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Journal articles on the topic 'CIE Lab color space'

Author: Grafiati

Published: 7 June 2025

Last updated: 16 July 2025

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1

Lozhkin, Leonid D., and Alexander A. Kuzmenko. "Investigation of CIE color spaces for differences in color differentiation thresholds in different regions of the color locus." Physics of Wave Processes and Radio Systems 24, no. 3 (2021): 107–10. http://dx.doi.org/10.18469/1810-3189.2021.24.3.107-110.

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The equidistance of the color space plays a significant role in determining the color difference in color transmission systems. Strictly equal contrasting color spaces can be considered only those color spaces in which equal changes in the visual perception of color are provided with an equal change in the color coordinates in this color space. Currently, the International Commission on Lighting (CIE) has adopted a number of color spaces called equal-contrast. The article presents the results of the study of color spaces adopted by CIE for equal contrast, i.e. on the differences in the thresho

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Tong, Li Ping, Bin Peng, and Yi Wei Fei. "The Color Recognition of Jet Fuel Silver Corrosion Images Based on Color Difference Formula." Advanced Materials Research 503-504 (April 2012): 1033–36. http://dx.doi.org/10.4028/www.scientific.net/amr.503-504.1033.

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This article introduces the basic theoretical knowledge of the multi-color space and its color difference formula. By research and experiment, it validates that HSV and CIE L * a * b * color space and its corresponding color difference formula, which are used in the color recognition of jet fuel silver corrosion image, and their results are mostly in accordance with the recognition results by the naked eyes. And it also proves the feasibility of these two methods for the color recognition of jet fuel silver corrosion. Silver strip corrosion experiment must be tested as one of jet fuel corrosio

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Male, Philippe. "Color Management System." Microscopy and Microanalysis 7, S2 (2001): 842–43. http://dx.doi.org/10.1017/s1431927600030282.

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Perception of color. in 1917, Alfred Munsell created a “notation of colors” based on the human perception of colors (Fig 1). The “tri stimuli” sensitivity of red, green and blue of the eye cones allows humans to live in an additive color space. Munsell showed that any color is defined by three components: 1-Hue, similar to different visible wavelengths. 2-Chromaticity or saturation, similar to concentration of dyes. 3-Value or brightness, representing black and white.Color Space and Gamut. Three conditions must be met to know the existence of an object, they are 1- An Illuminant (5000°K for ph

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Sari, Filiz, and Ali Burak Ulas. "Deep Learning Application in Detecting Glass Defects with Color Space Conversion and Adaptive Histogram Equalization." Traitement du Signal 39, no. 2 (2022): 731–36. http://dx.doi.org/10.18280/ts.390238.

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Manually detecting defects on the surfaces of glass products is a slow and time-consuming process in the quality control process, so computer-aided systems, including image processing and machine learning techniques are used to overcome this problem. In this study, scratch and bubble defects of the jar, photographed in the studio with a white matte background and a -60° peak angle, are investigated with the Yolo-V3 deep learning technique. Obtained performance is 94.65% for the raw data. Color space conversion (CSC) techniques, HSV and CIE-Lab Luv, are applied to the resulting images. V channe

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Luo, Yun Hui, and Mao Hai Lin. "Three-Dimensional Color Gamut Visualization of Digital Output Device Based on ICC Profile." Applied Mechanics and Materials 262 (December 2012): 36–39. http://dx.doi.org/10.4028/www.scientific.net/amm.262.36.

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As color gamut of digital output device greatly affects image appearance, accurate and effective gamut description for output device is intensively required for developing high-quality image reproduction technique based on gamut mapping. In this paper, we present a novel method to determine color gamut of output device by using a specific 3D reconstruction technology and device ICC profile. First, we populate the device color space by uniform sampling in the RGB 3-Dimensional space, and convert these sampling points to CMYK color space. Then, we work out the CIE LAB value of these points accor

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Xue, Yongan, Jinling Zhao, and Mingmei Zhang. "A Watershed-Segmentation-Based Improved Algorithm for Extracting Cultivated Land Boundaries." Remote Sensing 13, no. 5 (2021): 939. http://dx.doi.org/10.3390/rs13050939.

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To accurately extract cultivated land boundaries based on high-resolution remote sensing imagery, an improved watershed segmentation algorithm was proposed herein based on a combination of pre- and post-improvement procedures. Image contrast enhancement was used as the pre-improvement, while the color distance of the Commission Internationale de l´Eclairage (CIE) color space, including the Lab and Luv, was used as the regional similarity measure for region merging as the post-improvement. Furthermore, the area relative error criterion (δA), the pixel quantity error criterion (δP), and the cons

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Tarasov, D. A., and O. B. Milder. "Mathematics and practice of color space invariants by the example of determining the gray balance for a digital printing system." Computer Optics 44, no. 1 (2020): 117–26. http://dx.doi.org/10.18287/2412-6179-co-580.

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In modern printing, a large number of tasks are associated with the mutual transformation of color spaces. In particular, the most common pair of hardware-dependent color spaces is RGB and CMYK, the mutual transformation of colors in which is ambiguous, which creates significant problems in color reproduction. To solve this problem, we propose using color space invariants — gradation trajectories and gradation surfaces, which are analogs of gradation curves for initial colorants and their binary overlays, constructed in the absolute color space of the CIE Lab. Invariants are introduced on the

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Kuriki, Ichiro. "A Novel Method of Color Appearance Simulation Using Achromatic Point Locus With Lightness Dependence." i-Perception 9, no. 2 (2018): 204166951876173. http://dx.doi.org/10.1177/2041669518761731.

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The purpose of the present study is to propose a simple algorithm for color appearance simulation under a color illuminant. Achromatic point is a chromaticity of rays that appear neither red nor green, neither blue nor yellow under a given illuminant condition. Saturation and hue of surface colors are evaluated with respect to the achromatic point of the same lightness, while the achromatic point under a colored illuminant depends on the lightness tested. We previously found that this achromatic point locus can be simply approximated as a line with a parallel offset from the lightness axis of

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Guo, Ying, Jun Zhang, and Tao Mo. "Contribution of Green Jadeite-Jade’s Chroma Difference Based on CIE 1976 L*a*b* Uniform Color Space." Advanced Materials Research 177 (December 2010): 620–23. http://dx.doi.org/10.4028/www.scientific.net/amr.177.620.

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The correlations between lightness and chroma, lightness difference and color difference, chroma difference and color difference were studied to evaluate the impact of lightness on color. Based on color difference formula CIE LAB in the uniform color space CIE L*a*b* it is learnt that H*ab of jadeite jade green colors has made little contribution to E*ab. Given the fact that human eyes are relatively sensitive to the color perception of lightness difference and that lightness and chroma affect each other, lightness of jadeites has been divided into two groups: while the lightness of green is

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Kim, Hyun-Koo, Ju H. Park, and Ho-Youl Jung. "An Efficient Color Space for Deep-Learning Based Traffic Light Recognition." Journal of Advanced Transportation 2018 (December 6, 2018): 1–12. http://dx.doi.org/10.1155/2018/2365414.

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Traffic light recognition is an essential task for an advanced driving assistance system (ADAS) as well as for autonomous vehicles. Recently, deep-learning has become increasingly popular in vision-based object recognition owing to its high performance of classification. In this study, we investigate how to design a deep-learning based high-performance traffic light detection system. Two main components of the recognition system are investigated: the color space of the input video and the network model of deep learning. We apply six color spaces (RGB, normalized RGB, Ruta’s RYG, YCbCr, HSV, an

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Seo, Dae, Yong Kim, Yang Eo, and Wan Park. "Learning-Based Colorization of Grayscale Aerial Images Using Random Forest Regression." Applied Sciences 8, no. 8 (2018): 1269. http://dx.doi.org/10.3390/app8081269.

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Image colorization assigns colors to a grayscale image, which is an important yet difficult image-processing task encountered in various applications. In particular, grayscale aerial image colorization is a poorly posed problem that is affected by the sun elevation angle, seasons, sensor parameters, etc. Furthermore, since different colors may have the same intensity, it is difficult to solve this problem using traditional methods. This study proposes a novel method for the colorization of grayscale aerial images using random forest (RF) regression. The algorithm uses one grayscale image for i

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Zhang, Mengmeng, Rongrong Ni, and Yao Zhao. "A Blind Print-Recapture Robust Watermark Scheme by Calculating Self-Convolution." International Journal of Digital Crime and Forensics 11, no. 4 (2019): 28–49. http://dx.doi.org/10.4018/ijdcf.2019100103.

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A blind print-recapture robust watermark scheme is proposed. Watermark patterns are embedded into the space domain of a color image and can be detected from a print-recaptured version of the image without knowledge of the original image. The process of embedding invisible watermarks to convert RGB color images to CIE Lab color spaces and embed periodic watermarks in both color channels at the same time. Watermark extraction is achieved by calculating self-convolution and inverting the geometric transformation such as rotation and scale. Normalized correlation coefficients between the extracted

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Poynton, Charles, Robin Atkins, Jaclyn Pytlarz, and Dale Stolitzka. "18‐3: Computing Display Color Gamut Volume using Tetrahedra." SID Symposium Digest of Technical Papers 54, no. 1 (2023): 229–32. http://dx.doi.org/10.1002/sdtp.16532.

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We describes an approach to computation of display color gamut volume (sometimes called color volume). We describe two methods of partitioning color space into tetrahedra, and methods of aggregating the volume of tetrahedra. There some mathematical subtleties that need to be addressed to efficiently obtain the correct result. We discuss the constraints that guide a suitable choice of color space in which to perform the calculation. Our goal is to characterize the range of physical stimuli produced by a display. We want a perceptual measure of this volume, but we want the metric to cover the en

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Kim, Sung Joon, and Kyung Won Baek. "Application of color science in dentistry." Journal of Medicine and Life Science 7, no. 2 (2010): 7–12. http://dx.doi.org/10.22730/jmls.2010.7.2.7.

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The color and appearance of teeth and oral structures are a complex phenomenon, with many factors such as lighting conditions, translucency, opacity, light scattering, gloss and the human eye and brain influencing the overall perception of tooth color. In clinical practice and research, measurements of the color of natural tooth, gingiva, restorative craniofacial and dental materials are important and applicable to many field. The application of color science in dentistry has enabled the measurement of tooth color in an objective way, with the most common color space in current use being CIE L

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Chandrakanth, T., and B. Sandhya. "Analysis of SSIM based Quality Assessment across Color Channels of Images." International Journal of System Dynamics Applications 4, no. 3 (2015): 30–42. http://dx.doi.org/10.4018/ijsda.2015070102.

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Advances in imaging and computing hardware have led to an explosion in the use of color images in image processing, graphics and computer vision applications across various domains such as medical imaging, satellite imagery, document analysis and biometrics to name a few. However, these images are subjected to a wide variety of distortions during its acquisition, subsequent compression, transmission, processing and then reproduction, which degrade their visual quality. Hence objective quality assessment of color images has emerged as one of the essential operations in image processing. During

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Hyunjoo, Ahn, and Lee Sangwon. "The Impact of Color on 2D Motion Illusion Design -Focused on Color Elements and Proximity Model within the CIE Lab Color Space-." JOURNAL OF THE KOREAN SOCIETY DESIGN CULTURE 30, no. 3 (2024): 239–53. http://dx.doi.org/10.18208/ksdc.2024.30.3.239.

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Wiśniewska, Kornelia, Ewelina Kłosek-Wawrzyn, Radosław Lach, and Waldemar Pichór. "Influence of the Grain Size Distribution of the Limestone Additives on the Color Properties and Phase Composition of Sintered Ceramic Materials Based on Cream-Firing Clays." Materials 15, no. 7 (2022): 2694. http://dx.doi.org/10.3390/ma15072694.

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The study focused on determining color changes in materials made of cream-firing clays from the Opoczno region (Poland) due to the addition of calcium carbonate in the form of limestone. Moreover, the influence of the grain size distribution of this additive on the color properties of the materials and their phase composition was determined. Test samples were prepared using theplastic method and fired at four different temperatures: 1120, 1140, 1160 and 1180 °C. The color properties of the surface of ceramic materials were determined in CIE-Lab color space using a colorimeter. Quantitative pha

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Naik, Dayakar L., Hizb Ullah Sajid, Ravi Kiran, and Genda Chen. "Detection of Corrosion-Indicating Oxidation Product Colors in Steel Bridges under Varying Illuminations, Shadows, and Wetting Conditions." Metals 10, no. 11 (2020): 1439. http://dx.doi.org/10.3390/met10111439.

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Early detection of corrosion in steel bridges is essential for strategizing the mitigation of further corrosion damage. Although various image-based approaches are available in the literature for corrosion detection, most of these approaches are tested on images acquired under uniform natural daylight illuminations i.e., inherent variations in the ambient lighting conditions are ignored. Owing to the fact that varying natural daylight illuminations, shadows, water wetting, and oil wetting are unavoidable in real-world scenarios, it is important to devise a robust technique for corrosion identi

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Culic, Bogdan, Vasile Prejmerean, Cristina Gasparik, Carina Culic, Cristian Dragos, and Diana Dudea. "In Vitro Evaluation of New Dental Software for Shade Matching." Key Engineering Materials 587 (November 2013): 360–65. http://dx.doi.org/10.4028/www.scientific.net/kem.587.360.

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In this study we evaluate a new computer software developed for determining tooth color parameters obtained from digital images taken in a general practice working conditions. In order to evaluate the accuracy of the program, we used as samples dental shade tabs. The tabs were measured using a dental spectrophotometer, and then photographed and measured using our program (Toodent). L, a, b values of the CIE Lab color space were obtained. The results were also automatically expressed in dental shade tab code. The results analysis was made by comparing the L, a, b values obtained by the program,

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Du, Yang, and Ying Guo. "Study on the Chromogenic Mechanism of Violet-Red to Orange-Red Spinel." Crystals 13, no. 2 (2023): 339. http://dx.doi.org/10.3390/cryst13020339.

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In this paper, the chemical composition and spectroscopy of 38 violet-red to orange-red spinel samples were analyzed by energy dispersive X-ray fluorescence spectrometer and UV-visible spectrophotometer, based on CIE LAB color space, to explore the effects of different chromogenic ions on spinel color transition. The results show that the chroma C* is mainly controlled by the variation of color coordinates a*, and the hue angle h° is mainly controlled by the variation of color coordinates b*. Spinel can be divided into iron-bearing spinel and chromium–vanadium-bearing spinel according to their

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Liu, Ziming, Danpei Zhao, Zhenwei Shi, and Zhiguo Jiang. "Unsupervised Saliency Model with Color Markov Chain for Oil Tank Detection." Remote Sensing 11, no. 9 (2019): 1089. http://dx.doi.org/10.3390/rs11091089.

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Traditional oil tank detection methods often use geometric shape information. However, it is difficult to guarantee accurate detection under a variety of disturbance factors, especially various colors, scale differences, and the shadows caused by view angle and illumination. Therefore, we propose an unsupervised saliency model with Color Markov Chain (US-CMC) to deal with oil tank detection. To avoid the influence of shadows, we make use of the CIE Lab space to construct a Color Markov Chain and generate a bottom-up latent saliency map. Moreover, we build a circular feature map based on a radi

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SREELEKHA, G., and P. S. SATHIDEVI. "A WAVELET-BASED PERCEPTUAL IMAGE CODER INCORPORATING A NEW MODEL FOR COMPRESSION OF COLOR IMAGES." International Journal of Wavelets, Multiresolution and Information Processing 07, no. 05 (2009): 675–92. http://dx.doi.org/10.1142/s0219691309003197.

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A wavelet-based perceptual image coder for the compression of color images is proposed here in which the coding structure is coupled with Human Visual System models to produce high quality images. The major contribution is the development of a new model for the compression of the color components based on psychovisual experiments, which quantifies the optimum amount of compression that can be applied to the color components for a given rate. The model is developed for YCbCr color space and the perceptually uniform CIE Lab color space. A complete coding structure for the compression of color im

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Tang, Wei Xi, Ying Guo, and Li Xia Ma. "Influence of Fe²⁺ on the Color Appearance of Yellow-Green Peridot." Key Engineering Materials 492 (September 2011): 370–73. http://dx.doi.org/10.4028/www.scientific.net/kem.492.370.

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Twenty-eight yellow-green color of uniform, high clarity and similar thickness of 5 mm × 7 mm oval faceted peridots from Jiaohe Jilin province were examined by LA-ICP-MS and Color i5 to test their chemical compositions and L*, C* and ho. The correlations between Fe2+ and color parameters were analyzed, in order to establish the influence on the color appearance of Fe2+. The chemical formula of the twenty-eight peridots is (Mg1.84,Fe0.19)2.04[(Si0.982,Al0.001)0.983O4], which was calculated by oxygen atom. It reveals that 0.19 mol Fe2+ is concluded in one mol peridot, and Fe2+ is the colorant of

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Zainuddin, Bunyamin, Elkawakib Syam’un, Muhammad Azrai, and Yunus Musa. "Prediction of Normalized Difference Vegetation Index and Spad Chlorophyll Under High Maize Population Density." BIO Web of Conferences 158 (2025): 03001. https://doi.org/10.1051/bioconf/202515803001.

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The study investigates the relationship between the Normalized Difference Vegetation Index (NDVI), SPAD reading and visible color spectra under high maize population density. Utilizing machine learning techniques and RGB colorimeter data from the CIE Lab color space, predictive models for NDVI and SPAD values were developed. The study, conducted at the Bajeng Research Station in South Sulawesi, Indonesia, spanned from October 2023 to January 2024. The experiment involved 78 hybrid maize candidates and five commercial varieties cultivated at a high-density setting of 83,333 plants per hectare.

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Shi, Rui Zhi, Kai Bo Fan, Xiao Zhou, Kun Yang, and Han Zhong Shi. "Study on the Model of Chromaticity Closed-Loop Control for Print Online Detection." Applied Mechanics and Materials 262 (December 2012): 291–96. http://dx.doi.org/10.4028/www.scientific.net/amm.262.291.

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The print online detection technology contains wide range of content, for instance alignment inspection, defect detection and color detection, among them the color detection is the most difficult. In this paper, IGT printability tester is used to produce different ink film thickness samples of the yellow, magenta, cyan, black and map spot colors brown, blue, green, red, purple and other colors. Based on large number of experiment data collected, though mathematical modeling, data analysis, experimental validation and model updating, a closed-loop control model and techniques based on the chrom

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Wang, Xiujuan, Liang Mao, and Ji Wang. "Underwater fish image enhancement method based on color correction." Highlights in Science, Engineering and Technology 1 (June 14, 2022): 415–25. http://dx.doi.org/10.54097/hset.v1i.498.

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Due to the absorption and scattering of light propagation underwater, the captured underwater images often have problems such as color bias, low contrast and poor clarity, resulting in low accuracy of underwater fish identification. To address this problem, this paper proposes an underwater fish image enhancement method based on color correction to enhance the acquired fish images and improve the accuracy of fish target recognition. Firstly, color correction is achieved by stretching the L component and changing the a and b components of the CIE-Lab color space to improve image sharpness. Then

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Kusuma, Edi Jaya, Ika Pantiawati, and Sri Handayani. "Melanoma Classification based on Simulated Annealing Optimization in Neural Network." Knowledge Engineering and Data Science 4, no. 2 (2022): 97. http://dx.doi.org/10.17977/um018v4i22021p97-104.

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Technology development in image processing and artificial intelligence field leads to the high demand for smart systems, especially in the health sector. Cancer is one of the diseases that has the highest mortality cases around the world. Melanoma is one of the cancer types that appear caused by high exposure to UV light. The earliest the melanoma was identified, the higher the chance the patient can be recovered. Therefore, this study carries the melanoma detection based on BPNN optimized by a simulated annealing algorithm. This research utilizes PH2 dermoscopic image data which contains 200

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Du, Yuting, Tong Qiao, Ming Xu, and Ning Zheng. "Towards Face Presentation Attack Detection Based on Residual Color Texture Representation." Security and Communication Networks 2021 (March 15, 2021): 1–16. http://dx.doi.org/10.1155/2021/6652727.

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Most existing face authentication systems have limitations when facing the challenge raised by presentation attacks, which probably leads to some dangerous activities when using facial unlocking for smart device, facial access to control system, and face scan payment. Accordingly, as a security guarantee to prevent the face authentication from being attacked, the study of face presentation attack detection is developed in this community. In this work, a face presentation attack detector is designed based on residual color texture representation (RCTR). Existing methods lack of effective data p

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Aydın Atasoy, Nesrin, and İrem Kura. "CLASSIFICATION OF X-RAY AND CT IMAGES IN DIFFERENT COLOR SPACES USING ROBUST CNN." Mühendislik Bilimleri ve Tasarım Dergisi 12, no. 3 (2024): 505–16. http://dx.doi.org/10.21923/jesd.1415150.

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Since deep learning models have been successfully used in many fields, they have been used to identify sick and healthy people in X-ray or Computed Tomography (CT) chest radiology images. In this study, Covid-19 and pneumonia classification is performed on both X-ray and CT images using the robust Convolutional Neural Network (CNN). BGR, HSV, and CIE LAB color space transformations are applied to X-ray and CT images to show that the model performs a successful classification independent of dataset characteristics. The binary classification accuracy rates of Covid-19 and pneumonia for X-ray ima

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Al Hakeem, Zahraa, Haider Ismael, and Hawraa Abbas. "An Automatic System for Smoke Detection in Outdoor Areas." Kerbala Journal for Engineering Sciences 3, no. 1 (2023): 15–31. https://doi.org/10.63463/kjes1069.

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Early detection of fires plays a crucial role in minimizing their impact and preventing them from spreading. Every year, the repetition of fires results in the loss of human life, animal life, and plant life. Fire detection has become increasingly desirable and significant in surveillance systems, where traditional methods of detecting smoke relied on smoke sensors. Therefore, this method is ineffective in open and large buildings, and outdoor areas. As a result, this study suggests using computer vision systems to detect smoke in open spaces by using a static camera. To reduce the data size w

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Mohamed, Hassan, Kazuo Nadaoka, and Takashi Nakamura. "Automatic Semantic Segmentation of Benthic Habitats Using Images from Towed Underwater Camera in a Complex Shallow Water Environment." Remote Sensing 14, no. 8 (2022): 1818. http://dx.doi.org/10.3390/rs14081818.

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Underwater image segmentation is useful for benthic habitat mapping and monitoring; however, manual annotation is time-consuming and tedious. We propose automated segmentation of benthic habitats using unsupervised semantic algorithms. Four such algorithms––Fast and Robust Fuzzy C-Means (FR), Superpixel-Based Fast Fuzzy C-Means (FF), Otsu clustering (OS), and K-means segmentation (KM)––were tested for accuracy for segmentation. Further, YCbCr and the Commission Internationale de l’Éclairage (CIE) LAB color spaces were evaluated to correct variations in image illumination and shadow effects. Be

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Yang, Sungjun, Seungyong Shin, Heonji Ha, and Sangmoon Park. "Nonstoichiometric LaO0.65F1.7 Structure and Its Green Luminescence Property Doped with Bi3+ and Tb3+ Ions for Applying White UV LEDs." Materials 15, no. 12 (2022): 4222. http://dx.doi.org/10.3390/ma15124222.

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Red–green–blue phosphors excited by ultraviolet (UV) radiation for white light LEDs have received much attention to improve the efficiency, color rendering index (CRI), and chromatic stability. The spectral conversion of a rare-earth ion-doped nonstoichiometric LaO0.65F1.7 host was explored with structural analysis in this report. The nonstoichiometric structure of a LaO0.65F1.7 compound, synthesized by a solid-state reaction using La2O3 and excess NH4F precursors, was analyzed by synchrotron X-ray powder diffraction. The crystallized LaO0.65F1.7 host, which had a tetragonal space group of P4/

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Behera, Debendra, and Dr Neelam rout. "Image Pattern Analysis Using Hybrid Feature Descriptors for Content-Based Image Retrieval." INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 09, no. 07 (2025): 1–9. https://doi.org/10.55041/ijsrem51301.

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Content-Based Image Retrieval (CBIR) has emerged as a vital technique for efficient image indexing and retrieval in large-scale databases. Traditional approaches often rely on handcrafted features such as color, texture, and shape, which are limited in capturing high-level semantic information. On the other hand, deep learning-based descriptors have shown significant improvement in extracting abstract features but often require large datasets and computational resources. This paper proposes a hybrid CBIR framework that fuses deep learning-based RGB image features with texture-based descriptors

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Jung, Sang-Bin, and Ji-Yeon Jang. "Surface Color and Dyeing Amount of Natural Hair Dyeing Using Cochineal." Journal of the Korean Society of Cosmetology 30, no. 6 (2024): 1503–11. https://doi.org/10.52660/jksc.2024.30.6.1503.

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This study analyzed the effects of mordants (alum, red clay, and salt) and dyeing temperatures (20°C, 40°C, 50°C, 60°C) on the natural dyeing of hair using cochineal. Hair samples were dyed according to combinations of each mordant and dyeing temperature, and the colors were measured using the CIE Lab* color space. The dye uptake was quantified using the K/S value. The experimental results showed that compared to the raw samples, the L*value decreased and the a* value increased under all dyeing conditions, indicating a more vivid color. At 20°C with alum, the L*value was 70.01, the a* value wa

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Pechyen, Chiravoot, Calin Trif, Benya Cherdhirunkorn, Surachet Toommee, and Yardnapar Parcharoen. "Measurement of Ellman’s Essay Using a Smartphone Camera Coupled with an Image Processing Technique in CIE-LAB Color Space for the Detection of Two Pesticides in Water." Analytica 6, no. 1 (2025): 4. https://doi.org/10.3390/analytica6010004.

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In recent years, Thailand’s agriculture sector has seen a significant rise in pesticide usage due to its vital role in the economy and global food trade. However, the uncontrolled use of pesticides poses severe health and environmental risks. This research focuses on the detection of pesticide residues, particularly carbaryl and paraoxon-ethyl, which are prevalent due to their high efficacy in pest control but pose neurological health risks by inhibiting acetylcholinesterase (AChE) activity, potentially impacting human health. The developed method assesses pesticide concentration by measuring

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Aleinikov, A. F. "METHOD OF NON-INVASIVE DETERMINATION OF FUNGAL DISEASES OF COMMON GARDEN STRAWBERRY." Siberian Herald of Agricultural Science 48, no. 3 (2018): 71–83. http://dx.doi.org/10.26898/0370-8799-2018-3-10.

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The relevance of early undamaging diagnosis of fungal, viral and bacterial diseases of common garden strawberry is proved. External symptoms of fungal diseases are given. On the basis of literature data, the existing optical methods of early diagnostics of cultivated plants are analyzed. It is established that the methods of pixel calculation of the image in the space of color channels of red, green and blue colors are more preferable than other optical methods for detection of strawberry fungal diseases. This results from the fact that fungal diseases create specific color spots and their dis

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Indriatmoko, Indriatmoko, Dimas A. Hedianto, Sari Budi Moria, and Didik WH Tjahjo. "Coloration Characteristic and Population Genetic Analysis of Wild-Captured Giant Tiger Shrimp (Penaeus monodon) from Aceh Timur." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 23, no. 3 (2018): 123. http://dx.doi.org/10.14710/ik.ijms.23.3.123-130.

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Giant tiger shrimp (Penaeus monodon) has become a prime commodity in Indonesia which was produced by aquaculture and capture fisheries activities. Aceh Province, in this case mostly represented by Aceh Timur District, was well-known as the center of wild-captured-adult giant tiger shrimp. Several previous investigations had proved for its high-quality shrimp spawner in producing good eggs in quality and quantity under artificial spawning condition. Two main interesting points of wild giant tiger shrimp from Aceh Timur came from their coloration and population clusters. This report was aimed to

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Wiśniewska, Kornelia, Waldemar Pichór, and Ewelina Kłosek-Wawrzyn. "Influence of Firing Temperature on Phase Composition and Color Properties of Ceramic Tile Bodies." Materials 14, no. 21 (2021): 6380. http://dx.doi.org/10.3390/ma14216380.

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This study is focused on the behavior of the cream-firing clays from Opoczno region (Poland). The ceramic masses on which tests were carried out consisted of cream-firingBorkowice clay and dolomite in two different grain sizes as an additive that changes the color of ceramic materials. Test samples were prepared by plastic method and fired at range of 1100–1240 °C. Phase composition of theinvestigated materials was characterized by XRD method with quantitive analysis of the amorphous phase determined by the Retvield technique. Color properties of the surface of the obtained ceramic materials w

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Suryasari, Suryasari, Aminuddin Rizal, Sri Kusumastuti, and Taufiqqurrachman Taufiqqurrachman. "Illuminance Color Independent in Remote Photoplethysmography for Pulse Rate Variability and Respiration Rate Measurement." JOIV : International Journal on Informatics Visualization 7, no. 3 (2023): 920. http://dx.doi.org/10.30630/joiv.7.3.1176.

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Remote photoplethysmography (rPPG) is now becoming a new trend method to measure human physiological parameters. Especially due to it noncontact measurement which safe dan suitable to use in this new era condition. Pulse rate variability (PRV) and respiration rate (RR) included as parameters can be measured by using rPPG. PRV and RR are used to measure both physical and psychological wellness of the subject. However, current performance challenges in rPPG algorithm in measuring PRV and RR are illuminance invariant and motion. Especially in different light condition which represent real-life en

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Abu-Alruz, Khaled. "Quality of White-Brined Nabulsi Cheese Made with Different Proportions of Sheep’s and Cows’ Milk." Current Research in Nutrition and Food Science Journal 11, no. 1 (2023): 88–110. http://dx.doi.org/10.12944/crnfsj.11.1.6.

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Nabulsi cheese is the dominant white-brined cheese in Jordan and neighboring countries. Although this cheese is typically prepared using sheep’s milk, achieving large-scale production or attaining a specific quality involves the use of cows’ milk. Nabulsi cheese is kept in >18% brine for up to 1 year at room temperature (25 °C) and then soaked in water for desalting before eating. In this study, the effects of the milk type/combination used for production (100% sheep’s milk; 100% cows’ milk; 1:1, 3:1, or 1:3 sheep’s:cows’ milk mixture), desalting (salted vs. desalted cheese), and storage ti

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Masek, Anna, and Malgorzata Latos-Brozio. "The Effect of Substances of Plant Origin on the Thermal and Thermo-Oxidative Ageing of Aliphatic Polyesters (PLA, PHA)." Polymers 10, no. 11 (2018): 1252. http://dx.doi.org/10.3390/polym10111252.

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The stabilization efficiency of flavonoids (rutin and hesperidin) in polyester (polylactide (PLA) and polyhydroxyalkaonate (PHA)) composites under oxygen at high temperature was investigated. The polymer was homogenized with three antioxidants then processed by extrusion. The effects of stabilizers on the following physicochemical properties were investigated: melt flow, Vicat softening temperature, surface energy, and color change (Cie-Lab space). The aim of this study was to improve the stability of aliphatic polyesters by extending and controlling their lifetime. Differential Scanning Calor

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Pérez-Estébanez, M., R. Pastrana-Fábregas, J. Isasi-Marín, and R. Sáez-Puche. "Inorganic pigments based on fluorite-type oxynitrides." Journal of Materials Research 21, no. 6 (2006): 1427–33. http://dx.doi.org/10.1557/jmr.2006.0177.

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Zirconia oxynitride rare-earth-doped pigments were prepared by ammonolysis of the zirconium rare-earth oxides, previously synthesized using the citrate complexation/calcination route. Different coloration has been obtained, the intensity of which is a function of the nitrogen amount in the case of the oxynitrides; in the case of the oxides, both color and intensity depend on the doping amount of rare earth. The obtained phases, Zr(1−x)CexO2, Zr(1−x)RxO(2−x/2)□x/2, with R = Eu or Er and Zr(1−x)RxO(2−x/2−3/2y)Ny□x/2■y/2 (R = Ce, Eu, and Er), have been characterized by x-ray powder diffraction, s

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Koyama, Kento, Marin Tanaka, Byeong-Hyo Cho, Yusaku Yoshikawa, and Shige Koseki. "Predicting sensory evaluation of spinach freshness using machine learning model and digital images." PLOS ONE 16, no. 3 (2021): e0248769. http://dx.doi.org/10.1371/journal.pone.0248769.

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The visual perception of freshness is an important factor considered by consumers in the purchase of fruits and vegetables. However, panel testing when evaluating food products is time consuming and expensive. Herein, the ability of an image processing-based, nondestructive technique to classify spinach freshness was evaluated. Images of spinach leaves were taken using a smartphone camera after different storage periods. Twelve sensory panels ranked spinach freshness into one of four levels using these images. The rounded value of the average from all twelve panel evaluations was set as the tr

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Bou-Belda, Eva, Daniel López-Rodríguez, Bàrbara Micó-Vicent, and Marilés Bonet-Aracil. "Direct and Reactive Dyes Recovery in Textile Wastewater Using Calcinated Hydrotalcite." Materials Science Forum 1063 (June 10, 2022): 233–42. http://dx.doi.org/10.4028/p-31v71q.

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Growing environmental conservation concerns have led researchers to seek the means to treat and recover wastewater. The textile industry dumps vast quantities of wastewater from textile dyes. By means of clays, dye waste can be separated and reused for other industrial processes. Clay absorption varies depending on the type of dye employed because factors like the reactivity of the dye molecule and its size are very important during the absorption process. The absorption capacity of calcined hydrotalcite at several concentrations was compared in a 0.05 g • L-1 solution of four distinct dyes: D

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Dhaterwal, D., M. Matoria, A. Dalal, Surender Kumar, and Sonika Singh. "Synthesis and Structural Features of Tunable Emitting Single- Phased Eu3+/ Tb3+ Co- Doped LaAlO3 Nanophosphors." Журнал структурной химии 65, no. 8 (2024): 130877. http://dx.doi.org/10.26902/jsc_id130877.

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In the prevailing study, single- phased color- tunable La1-x-yEuxTbyAlO3 co- doped nanocrystalline phosphors have been synthesized via the most simplistic and low cost urea- aided solution combustion synthetic route. This was done by adjusting the doping concentration of Eu3+ (x = 0.01, 0.03, 0.05, 0.07 mol) and Tb3+ (y = 0.03 mol) ions in the LaAlO3 host lattice. The X- ray powder diffraction (XRD) and Rietveld refinement analysis confirmed the formation of single- phased La0.97-xAlO3: xEu3+/ 0.03Tb3+ (x = 0.07), co- doped nanophosphor at 800°C. The synthesized nanophosphors were crystallized

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Endah, Sukmawati Nur, Retno Kusumaningrum, and Helmie Arif Wibawa. "Color Space to Detect Skin Image: The Procedure and Implication." Scientific Journal of Informatics 4, no. 2 (2017): 143–49. http://dx.doi.org/10.15294/sji.v4i2.12013.

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Skin detection is one of the processes to detect the presence of pornographic elements in an image. The most suitable feature for skin detection is the color feature. To be able to represent the skin color properly, it is needed to be processed in the appropriate color space. This study examines some color spaces to determine the most appropriate color space in detecting skin color. The color spaces in this case are RGB, HSV, HSL, YIQ, YUV, YCbCr, YPbPr, YDbDr, CIE XYZ, CIE L*a*b*, CIE L*u* v*, and CIE L*ch. Based on the test results using 400 image data consisting of 200 skin images and 200 n

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Rasid Mamat, Abd, Fatma Susilawati Mohamed, Mohamad Afendee Mohamed, Norkhairani Mohd Rawi, and Mohd Isa Awang. "Silhouette index for determining optimal k-means clustering on images in different color models." International Journal of Engineering & Technology 7, no. 2.14 (2018): 105. http://dx.doi.org/10.14419/ijet.v7i2.14.11464.

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Clustering process is an essential part of the image processing. Its aim to group the data according to having the same attributes or similarities of the images. Consequently, determining the number of the optimum clusters or the best (well-clustered) for the image in different color models is very crucial. This is because the cluster validation is fundamental in the process of clustering and it reflects the split between clusters. In this study, the k-means algorithm was used on three colors model: CIE Lab, RGB and HSV and the clustering process made up to k clusters. Next, the Silhouette Ind

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Sun, Bangyong, Han Liu, Shisheng Zhou, and Wenli Li. "Evaluating the Performance of Polynomial Regression Method with Different Parameters during Color Characterization." Mathematical Problems in Engineering 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/418651.

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The polynomial regression method is employed to calculate the relationship of device color space and CIE color space for color characterization, and the performance of different expressions with specific parameters is evaluated. Firstly, the polynomial equation for color conversion is established and the computation of polynomial coefficients is analysed. And then different forms of polynomial equations are used to calculate the RGB and CMYK’s CIE color values, while the corresponding color errors are compared. At last, an optimal polynomial expression is obtained by analysing several related

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Sukram, Sukram, and Sutikno Sutikno. "Pengaruh Suhu Dan Waktu Tinggal Terhadap Kecenderungan Menguning Pada Proses Produksi Alumunium Fasad." JATI UNIK : Jurnal Ilmiah Teknik dan Manajemen Industri 2, no. 1 (2019): 64. http://dx.doi.org/10.30737/jatiunik.v2i2.330.

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Painting using paint powder is one of the techniques of protection against corrosion are evolving rapidly. Powder paints have aesthetic value approaching liquid paint as well as durability and relative utilization is better than liquid paint. The process of maturation of the paint powder that is only done with the process of warming at a certain temperature and a certain span of time. Standard maturation process known as maturation curve (curing folder). The difference in temperature and time against standard value ranges of risk occurrence of color change especially in white color (light). Th

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Zheng, Yuan Lin, Shi Sheng Zhou, Yong Hong Qi, and Lin Lin Zhang. "Performance of CIE LAB-Based Color Difference Formulae under Different Viewing Conditions." Advanced Materials Research 457-458 (January 2012): 1294–98. http://dx.doi.org/10.4028/www.scientific.net/amr.457-458.1294.

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In order to investigate the performance of color difference formulae under different viewing conditions 144 pairs of sample around 17 color centers were designed and printed, and then assessed visually under four different viewing condition. STRESS values between the visual color difference and calculated color difference by five CIELAB-based color difference formulae CIELAB, BFD, CMC, CIE94, CIEDE200 were calculated. The result shows that the formulae have the similar performance but CIE94 is the best in all viewing conditions and CIELAB and BFD are the worst. All the color difference formula

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