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Journal articles on the topic 'Just Noticeable Difference (JND)'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 March 2023

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1

Zhang, Zhao, Xiwu Shang, Guoping Li, and Guozhong Wang. "Just Noticeable Difference Model for Images with Color Sensitivity." Sensors 23, no. 5 (2023): 2634. http://dx.doi.org/10.3390/s23052634.

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The just noticeable difference (JND) model reflects the visibility limitations of the human visual system (HVS), which plays an important role in perceptual image/video processing and is commonly applied to perceptual redundancy removal. However, existing JND models are usually constructed by treating the color components of three channels equally, and their estimation of the masking effect is inadequate. In this paper, we introduce visual saliency and color sensitivity modulation to improve the JND model. Firstly, we comprehensively combined contrast masking, pattern masking, and edge protect

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Tian, Tao, Hanli Wang, Sam Kwong, and C. C. Jay Kuo. "Perceptual Image Compression with Block-Level Just Noticeable Difference Prediction." ACM Transactions on Multimedia Computing, Communications, and Applications 16, no. 4 (2021): 1–15. http://dx.doi.org/10.1145/3408320.

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A block-level perceptual image compression framework is proposed in this work, including a block-level just noticeable difference (JND) prediction model and a preprocessing scheme. Specifically speaking, block-level JND values are first deduced by utilizing the OTSU method based on the variation of block-level structural similarity values between two adjacent picture-level JND values in the MCL-JCI dataset. After the JND value for each image block is generated, a convolutional neural network–based prediction model is designed to forecast block-level JND values for a given target image. Then, a

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Wang, Chunxing, Xiaoyue Han, Wenbo Wan, Jing Li, Jiande Sun, and Meiling Xu. "Visual Saliency Based Just Noticeable Difference Estimation in DWT Domain." Information 9, no. 7 (2018): 178. http://dx.doi.org/10.3390/info9070178.

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It has been known that human visual systems (HVSs) can be applied to describe the underlying masking properties for the image processing. In general, HVS can only perceive small changes in a scene when they are greater than the just noticeable distortion (JND) threshold. Recently, the cognitive resources of huma visual attention mechanisms are limited, which can not concentrate on all stimuli. To be specific, only more important stimuli will react from the mechanisms. When it comes to visual attention mechanisms, we need to introduce the visual saliency to model the human perception more accur

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Jacquot, L., J. Hidalgo, and G. Brand. "Just noticeable difference in olfaction is related to trigeminal component of odorants." Rhinology journal 48, no. 3 (2010): 281–84. http://dx.doi.org/10.4193/rhino09.200.

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Many studies have dealt with the interrelationships between both olfactory and trigeminal systems but a poorly explored question concerns the role of each system in the detection processes, especially in the just noticeable difference (JND). The aim of this study was to investigate variations in JNDs for three odorants in relation to their trigeminal component, i.e. low, middle, high. The results indicated that the higher the trigeminal component, the lower the JND, suggesting a better capacity to perceive intensity changes for pungent odorants than for relatively pure odorants.

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Bondžulić, Boban, Boban Pavlović, Nenad Stojanović, and Vladimir Petrović. "Picture-wise just noticeable difference prediction model for JPEG image quality assessment." Vojnotehnicki glasnik 70, no. 1 (2022): 62–86. http://dx.doi.org/10.5937/vojtehg70-34739.

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Introduction/purpose: The paper presents interesting research related to the performance analysis of the picture-wise just noticeable difference (JND) prediction model and its application in the quality assessment of images with JPEG compression. Methods: The performance analysis of the JND model was conducted in an indirect way by using the publicly available results of subject-rated image datasets with the separation of images into two classes (above and below the threshold of visible differences). In the performance analysis of the JND prediction model and image quality assessment, five ima

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Huang, Wanting, Lena L. N. Wong, and Fei Chen. "Just-Noticeable Differences of Fundamental Frequency Change in Mandarin-Speaking Children with Cochlear Implants." Brain Sciences 12, no. 4 (2022): 443. http://dx.doi.org/10.3390/brainsci12040443.

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Fundamental frequency (F0) provides the primary acoustic cue for lexical tone perception in tonal languages but remains poorly represented in cochlear implant (CI) systems. Currently, there is still a lack of understanding of sensitivity to F0 change in CI users who speak tonal languages. In the present study, just-noticeable differences (JNDs) of F0 contour and F0 level changes in Mandarin-speaking children with CIs were measured and compared with those in their age-matched normal-hearing (NH) peers. Results showed that children with CIs demonstrated significantly larger JND of F0 contour (JN

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Hu, Tingyu, Haibing Yin, Hongkui Wang, Ning Sheng, and Yafen Xing. "Pixel-Domain Just Noticeable Difference Modeling with Heterogeneous Color Features." Sensors 23, no. 4 (2023): 1788. http://dx.doi.org/10.3390/s23041788.

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With the rapidly emerging user-generated images, perception compression for color image is an inevitable mission. Whilst in existing just noticeable difference (JND) models, color-oriented features are not fully taken into account for coinciding with HVS perception characteristics, such as sensitivity, attention, and masking. To fully imitate the color perception process, we extract color-related feature parameters as local features, including color edge intensity and color complexity, as well as region-wise features, including color area proportion, color distribution position and color distr

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Lee, Haram, Beta Bayu Santika, Hyunin Jo, and Jinyong Jeon. "Just noticeable difference of sound pressure level of speech in open-plan office." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 1 (2021): 5166–69. http://dx.doi.org/10.3397/in-2021-2990.

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In this study, the general sound environment characteristics of open-plan office (OPO) were investigated, and just noticeable difference (JND) of sound pressure level of speech at a distance of 4 m (Lp,A,S,4m) suggested in ISO 3382-3 was suggested. First, in order to understand the sound environment characteristics of OPO, one minute sound sources recorded in 8 offices were collected and physical and psychological acoustic characteristics were analyzed. A total of 30 office workers were subject to subjective evaluation on 8 sound sources, and they were asked to respond to questionnaires relate

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Weir, P. L., A. M. Holmes, D. M. Andrews, W. J. Albert, N. R. Azar, and J. P. Callaghan. "Determination of the just noticeable difference (JND) in trunk posture perception." Theoretical Issues in Ergonomics Science 8, no. 3 (2007): 185–99. http://dx.doi.org/10.1080/14639220500232446.

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Zhou, Kai, Yunming Zhang, Jing Li, Yantong Zhan, and Wenbo Wan. "Spatial-Perceptual Embedding with Robust Just Noticeable Difference Model for Color Image Watermarking." Mathematics 8, no. 9 (2020): 1506. http://dx.doi.org/10.3390/math8091506.

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In the robust image watermarking framework, watermarks are usually embedded in the direct current (DC) coefficients in discrete cosine transform (DCT) domain, since the DC coefficients have a larger perceptual capacity than any alternating current (AC) coefficients. However, DC coefficients are also excluded from watermark embedding with the consideration of avoiding block artifacts in watermarked images. Studies on human vision suggest that perceptual characteristics can achieve better image fidelity. With this perspective, we propose a novel spatial–perceptual embedding for a color image wat

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Hidalgo, J., G. Chopard, J. Galmiche, L. Jacquot, and G. Brand. "Just noticeable difference in olfaction: a discriminative tool between healthy elderly and patients with cognitive disorders associated with dementia." Rhinology journal 49, no. 5 (2011): 513–18. http://dx.doi.org/10.4193/rhino11.013.

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Olfactory dysfunction appears to be one of the earliest signs of several age-related neurodegenerative disorders, including Alzheimer`s disease (AD) or Parkinson`s disease (PD). To rate performance and olfactory deficits in patients with cognitive disorders, various olfactory tasks have been used such as odor detection, discrimination, recognition memory, identification and naming but no study has been focused on just noticeable difference (JND), a sensitive tool of detection. The aim of this study was to investigate and compare variations in JNDs in healthy elderly and in patients with cognit

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Cho, Chang K., Hak Min Lee, Myung Hwan Yun, and Myun W. Lee. "Development of a temperature control procedure for a room air-conditioner using the concept of just noticeable difference (JND) on thermal sensation." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 40, no. 9 (1996): 473–77. http://dx.doi.org/10.1177/154193129604000901.

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Temperature control for an air-conditioner is an ergonomic design variable. Ergonomic studies on the thermal sensations in room environment are relatively few while many studies are available for the thermal sensations in extremely warm/cold conditions. The objective of this study was to find out factors which affect the cutaneous thermal sensations and so to propose new cooling control procedure using the JND(just noticeable difference) values of cutaneous thermal sensation for the design of an air-conditioner. The JNDs of cutaneous thermal sensation corresponding to the skin, room temperatur

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Kimura, Noriko, Akira Ichinose, and Satoshi Suzuki. "Measurement of Just Noticeable Difference in Pedal Pressure during High-speed Driving." IEEJ Transactions on Electronics, Information and Systems 135, no. 4 (2015): 351–55. http://dx.doi.org/10.1541/ieejeiss.135.351.

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Yang, Haining, Lu Liu, Hui Tang, et al. "Relationship of Just Noticeable Difference (JND) in Black Level and White Level With Image Content." Journal of Display Technology 10, no. 6 (2014): 470–77. http://dx.doi.org/10.1109/jdt.2014.2302585.

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Xu, Qiang, M. Ronnier Luo, and Dragan Sekulovski. "Investigation of Spatial Chromatic Contrast around 5 Colour Centres." London Imaging Meeting 2020, no. 1 (2020): 1–4. http://dx.doi.org/10.2352/issn.2694-118x.2020.lim-31.

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The goal of this research work is to generate high quality chromatic contrast sensitivity (CCS) data over a large range, especially at low spatial frequencies surrounding 5 colour centres, e.g.white, red, yellow, green and blue. An experiment was carried out using forced-choice stair-case method to investigate the visible colour difference thresholds in different colour changing directions at different spatial frequencies. The just noticeable difference (JND) ellipses at different spatial frequencies were used to represent the data.

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Caswell-Midwinter, Benjamin, and William M. Whitmer. "Discrimination of Gain Increments in Speech-Shaped Noises." Trends in Hearing 23 (January 2019): 233121651882022. http://dx.doi.org/10.1177/2331216518820220.

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Frequency-dependent gain adjustments are routine in hearing-aid fittings, whether in matching to real-ear targets or fine-tuning to patient feedback. Patient feedback may be unreliable and fittings inefficient if adjustments are not discriminable. To examine what gain adjustments are discriminable, we measured the just-noticeable differences (JNDs) for level increments in speech-shaped noises processed with prescription gains. JNDs were measured in the better ears of 38 participants with hearing impairment using a fixed-level, same-different task. JNDs were measured for increments at six indiv

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Wang, Zhe, Trung-Hieu Tran, Ponnanna Kelettira Muthappa, and Sven Simon. "A JND-Based Pixel-Domain Algorithm and Hardware Architecture for Perceptual Image Coding." Journal of Imaging 5, no. 5 (2019): 50. http://dx.doi.org/10.3390/jimaging5050050.

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This paper presents a hardware efficient pixel-domain just-noticeable difference (JND) model and its hardware architecture implemented on an FPGA. This JND model architecture is further proposed to be part of a low complexity pixel-domain perceptual image coding architecture, which is based on downsampling and predictive coding. The downsampling is performed adaptively on the input image based on regions-of-interest (ROIs) identified by measuring the downsampling distortions against the visibility thresholds given by the JND model. The coding error at any pixel location can be guaranteed to be

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Rahne, Torsten, Lars Böhme, and Gerrit Götze. "Influence of Implantable Hearing Aids and Neuroprosthesison Music Perception." Scientific World Journal 2012 (2012): 1–7. http://dx.doi.org/10.1100/2012/404590.

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The identification and discrimination of timbre are essential features of music perception. One dominating parameter within the multidimensional timbre space is the spectral shape of complex sounds. As hearing loss interferes with the perception and enjoyment of music, we approach the individual timbre discrimination skills in individuals with severe to profound hearing loss using a cochlear implant (CI) and normal hearing individuals using a bone-anchored hearing aid (Baha). With a recent developed behavioral test relying on synthetically sounds forming a spectral continuum, the timbre differ

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TAMURA, T., T. SATOH, T. UCHIDA, and T. FURUHATA. "Quantitative Evaluation of Luminance Nonuniformity "Mura" in LCDs Based on Just Noticeable Difference (JND) Contrast at Various Background Luminances." IEICE Transactions on Electronics E89-C, no. 10 (2006): 1435–40. http://dx.doi.org/10.1093/ietele/e89-c.10.1435.

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H K, Bhagya, and Keshaveni N. "Contrast Enhancement Technique using Discrete Wavelet Transform with Just Noticeable Difference Model for 3D Stereoscopic Degraded Video." International Journal of Innovative Technology and Exploring Engineering 10, no. 3 (2021): 7–13. http://dx.doi.org/10.35940/ijitee.c8343.0110321.

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The Video Technologies for Medical, cultural, and social activities prefer 3D visual data rendering and processing. So 3D videos are captured by any capturing devices, like the digital cameras are not acceptable all the time due to the lack of capturing devices or indecent illumination or due to poor weather surroundings like Low light, rain, fog, mist, etc. reduces the contrast, thus the videos get degraded. 3D video contrast enhancement technique is an essential process for upgrading the quality and information content in the videos. The proposed work employs a discrete wavelet transform bas

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Tzu, Fu-Ming, and Jung-Hua Chou. "Optical Detection of Green Emission for Non-Uniformity Film in Flat Panel Displays." Crystals 8, no. 11 (2018): 421. http://dx.doi.org/10.3390/cryst8110421.

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Among colours, the green colour has the most sensitivity in human vision so that green colour defects on displays can be effortlessly perceived by a photopic eye with the most intensity in the wavelength 555 nm of the spectrum. With the market moving forward to high resolution, displays can have resolutions of 10 million pixels. Therefore, the method of detecting the appearance of the panel using ultra-high resolutions in TFT-LCD is important. The machine vision associated with transmission chromaticity spectrometer that quantises the defects are explored, such as blackening and whitening. The

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Durlach, N. I., B. G. Shinn-Cunningham, and R. M. Held. "Supernormal Auditory LocalizationI. General Background." Presence: Teleoperators and Virtual Environments 2, no. 2 (1993): 89–103. http://dx.doi.org/10.1162/pres.1993.2.2.89.

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In this series of papers, we consider human auditory localization and how its deficiencies can be reduced by appropriate processing and coding of acoustical signals in teleoperator and virtual-environment systems. Attention is given to how localization cues can be altered to improve the just-noticeable-difference (JND) in spatial position and to phenomena related to the use of such altered localization cues for the identification of spatial position. Unlike most current studies of synthetic auditory localization, our study includes consideration of distance as well as direction. In this first

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Xu, Qiang, Guihua Cui, Muhammad Safdar, Lihao Xu, Ming Ronnier Luo, and Baiyue Zhao. "Assessing Colour Differences under a Wide Range of Luminance Levels Using Surface and Display Colours." Color and Imaging Conference 2019, no. 1 (2019): 355–59. http://dx.doi.org/10.2352/issn.2169-2629.2019.27.64.

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Two experimental data sets were accumulated for evaluating colour differences under a wide range of luminance levels using the printed colours in a spectrum tuneable viewing cabinet and self-luminous colours on a display respectively. For the surface mode experiment, pairs of samples were assessed at 9 phases ranged from 0.25 to 1128 cd/m2. For the luminous mode experiment, it was conducted in 6 phases ranged from 0.25 to 279 cd/m2. There were 140 and 42 pairs of samples judged by 20 observers using a sixcategory scales for each phase. The results were used to establish the just noticeable dif

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Nguyen, Tuan Duc, and Dung Huu Le. "A secure image steganography based on JND model." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 2 (2020): 2088. http://dx.doi.org/10.11591/ijece.v10i2.pp2088-2096.

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Minimizing distortion produced by embedding process is very important to improve the security of hidden message and maintain the high visual quality of stego images. To achieve these objectives, an effective strategy is to perform pixel selection which is well-known as a channel selection rule. In this approach, a pixel associated with the smallest image degradation is chosen to carry secret bits. From these facts, in this paper, a new secure channel selection rule for digital images in spatial domain is designed and proposed. In this new approach, the modified matrix embedding method is utili

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Huang, Shih Miao, and Jui Chang Lin. "Effects of Light Wavelengths on the Performance of Color Absolute Judgments." Key Engineering Materials 364-366 (December 2007): 942–48. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.942.

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Optically, humans can discriminate between colors as close as 2nm in wavelength in relative judgment task. However, there is little research to discuss color differences for absolute color judgments in which the comparison is held in memory. Therefore, the intent of this study was to explore effects of wavelengths on the Just Noticeable Difference (JND) of absolute judgments in our perceptual world. A color identification task was utilized to investigate the JND of wavelengths. In the experiment, the Standard Stimulus Color (SSC) and the Comparison Stimulus Color (CSC) were successively presen

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Qu, Jiasheng, Wei Song, Xiangchun Liu, Lizhi Zhao, and Xiaobing Zhao. "A Novel Improved Reversible Visible Image Watermarking Algorithm Based on Grad-CAM and JND." Security and Communication Networks 2021 (January 25, 2021): 1–17. http://dx.doi.org/10.1155/2021/6652897.

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With the rapid access convenience of content brought by 5G technology, the integrity protection of content becomes more important. The reversible visible watermarking algorithm has attracted more attention due to its effective content protection. In this paper, a novel improved reversible visible image watermarking scheme based on gradient-weighted class activation mapping (Grad-CAM) and the just noticeable difference (JND) model has been presented. The proposed region of interest (ROI) selection strategy is used to locate the main protected body of images for watermark embedding. Divide the w

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Lee, Hak Min, Chang K. Cho, Myung Hwan Yun, and Myun W. Lee. "Development of a temperature control procedure for a room air-conditioner using the concept of just noticeable difference (JND) in thermal sensation." International Journal of Industrial Ergonomics 22, no. 3 (1998): 207–16. http://dx.doi.org/10.1016/s0169-8141(97)00009-7.

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Fukuda, Shunya, Shingo Kagami, and Koichi Hashimoto. "Evaluation of Perceptual Difference in Dynamic Projection Mapping with and without Movement of the Target Surface." Journal of Robotics and Mechatronics 34, no. 5 (2022): 1141–51. http://dx.doi.org/10.20965/jrm.2022.p1141.

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High-frame-rate visual feedback has been proven effective for projection mapping on quickly moving targets. However, the quantitative conditions of frame rates have not been elucidated. In particular, considering that the human dynamic visual acuity generally declines as the moving target velocity increases, it may be argued that the tracking accuracy required for projection mapping on moving targets can be lower than that required for fixed targets. To examine the above-mentioned conditions of frame rates, this study compares them based on two types of projection mapping systems having equiva

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HE, LIHUO, WEN LU, XINBO GAO, DACHENG TAO, and XUELONG LI. "A NOVEL METRIC BASED ON MCA FOR IMAGE QUALITY." International Journal of Wavelets, Multiresolution and Information Processing 09, no. 05 (2011): 743–57. http://dx.doi.org/10.1142/s0219691311004298.

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Considering that the Human Visual System (HVS) has different perceptual characteristics for different morphological components, a novel image quality metric is proposed by incorporating Morphological Component Analysis (MCA) and HVS, which is capable of assessing the image with different kinds of distortion. Firstly, reference and distorted images are decomposed into linearly combined texture and cartoon components by MCA respectively. Then these components are turned into perceptual features by Just Noticeable Difference (JND) which integrates masking features, luminance adaptation and Contra

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Jiang, W., S. Chen, X. Wang, Q. Huang, H. Shi, and Y. Man. "REMOTE SENSING IMAGE QUALITY ASSESSMENT EXPERIMENT WITH POST-PROCESSING." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3 (April 30, 2018): 665–68. http://dx.doi.org/10.5194/isprs-archives-xlii-3-665-2018.

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This paper briefly describes the post-processing influence assessment experiment, the experiment includes three steps: the physical simulation, image processing, and image quality assessment. The physical simulation models sampled imaging system in laboratory, the imaging system parameters are tested, the digital image serving as image processing input are produced by this imaging system with the same imaging system parameters. The gathered optical sampled images with the tested imaging parameters are processed by 3 digital image processes, including calibration pre-processing, lossy compressi

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Kraus, Nina, Dawn Burton Koch, Therese J. McGee, Trent G. Nicol, and Jenna Cunningham. "Speech-Sound Discrimination in School-Age Children." Journal of Speech, Language, and Hearing Research 42, no. 5 (1999): 1042–60. http://dx.doi.org/10.1044/jslhr.4205.1042.

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This study measured behavioral speech-sound discrimination and a neurophysiologic correlate of discrimination in normal school-age children (ages 6 to 15) to determine if developmental effects exist. Just noticeable differences (JNDs) and mismatch responses (MMNs) were assessed for synthetic syllables that differed in third-formant onset frequency (/da-ga/) and formant transition duration (/ba-wa/). These stimuli were selected because children with learning problems often find it difficult to discriminate rapid spectrotemporal changes like /da-ga/, whereas the ability to distinguish /ba-wa/ is

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Adelstein, B. D., E. M. Burns, S. R. Ellis, and M. I. Hill. "Latency Discrimination Mechanisms in Virtual Environments: Velocity and Displacement Error Factors." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 49, no. 26 (2005): 2221–25. http://dx.doi.org/10.1177/154193120504902601.

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Latency (time delay) in head-tracked virtual environments (VEs) is well known to disturb users' sense of presence as well as hinder performance in manipulation tasks. We have determined in previous studies that observers cannot rely solely on direct temporal detection of time delay. They, at least in part, perceive the consequent visual “slip” of the VE scene from its expected spatially stable location. By employing an occlusion technique, the present experiment enabled comparison of the influence of visual image displacement and velocity errors on observer discrimination of VE system latency

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Jacquet, Wolfgang, Roberto G. Cleymaet, and Peter Bottenberg. "Grey value contrast sensitivity of dental practitioners in function of luminance and age." Dentomaxillofacial Radiology 48, no. 6 (2019): 20180398. http://dx.doi.org/10.1259/dmfr.20180398.

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Objectives:Grey value perception is important in viewing and interpreting X-ray images. It is possible that ageing decreases the number of gray values that a person can distinguish. This hypothesis was tested in a group of dental practitioners from students to experienced dentists using a 12-bit grey scale.Methods and materials:A custom-made computer software was used based on the principle of the “just noticeable difference” (JND). Observers were shown a picture of an outer square with increasing grey value in which a smaller square of different grey value popped up in changing positions. As

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Alleysson, D., and J. Hérault. "Photoreceptor Nonlinearities Can Account for the MacAdam Ellipses." Perception 26, no. 1_suppl (1997): 68. http://dx.doi.org/10.1068/v970036.

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Colour perception is known to be nonlinear, as highlighted by D L MacAdam (1942 Journal of the Optical Society of America32 247). He showed that the just noticeable difference (JND) between two colours is not constant and depends nonuniformly on the values of these two colours: under constant illumination, the constant-JND loci, drawn in the xy colour space around various centres, appear as ellipses of different orientations and eccentricities. Though this phenomenon encompasses the whole perception chain, from receptors to higher levels, we show that it can be accounted for mainly by the nonl

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Khabbaz, Faezeh Heydari, Andrew Goldenberg, and James Drake. "Force Discrimination Ability of the Human Hand near Absolute Threshold for the Design of Force Feedback Systems in Teleoperations." Presence: Teleoperators and Virtual Environments 25, no. 1 (2016): 47–60. http://dx.doi.org/10.1162/pres_a_00245.

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Force discrimination ability is an important surgical skill for micro or minimally invasive surgeries. This article analyzes the force perception of the human hand for lowintensity stimuli. Psychophysical experiments were conducted to measure just noticeable differences (JNDs) at four reference forces below 1 N. Reference forces are chosen to be in the range of forces in minimally invasive surgery that do not follow Weber's law. The force discrimination ability of two groups of subjects, surgeons and non-surgeons, is compared. Results demonstrate a superior ability of surgeons in discriminatin

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Zanker, Johannes M. "Does Motion Perception Follow Weber's Law?" Perception 24, no. 4 (1995): 363–72. http://dx.doi.org/10.1068/p240363.

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The subjective strength of a percept often depends on the stimulus intensity in a nonlinear way. Such coding is often reflected by the observation that the just-noticeable difference between two stimulus intensities (JND) is proportional to the absolute stimulus intensity. This behaviour, which is usually referred to as Weber's Law, can be interpreted as a compressive nonlinearity extending the operating range of a sensory system. When the noise superimposed on a motion stimulus is increased along a logarithmic scale (in order to provide linear steps in subjective difference) in motion-coheren

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Dantas, Sérgio Roberto Andrade, Fulvio Vittorino, and Kai Loh. "The effectiveness of TiO2 additions to mortar to maintain initial conditions in terms of its reflectance to solar radiation." Ambiente Construído 17, no. 3 (2017): 39–56. http://dx.doi.org/10.1590/s1678-86212017000300161.

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Abstract Contact of facades with degradation agents and direct incidence of ultraviolet radiation on external coatings make them more opaque over time, affecting their colour and reflectance characteristics. This study evaluated the effect of adding different TiO2 contents to mortars applied in concrete substrates in order to verify the reflectance maintenance on surfaces after exposure over time. Mortar with different concentrations of TiO2 (1%, 5%, 10%) were produced in relation to the total dry premix, added as a powder and compared to unpainted mortar without TiO2 (type "A") and painted mo

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Groenen, Paul, Thom Crul, Ben Maassen, and Wim van Bon. "Perception of Voicing Cues by Children With Early Otitis Media With and Without Language Impairment." Journal of Speech, Language, and Hearing Research 39, no. 1 (1996): 43–54. http://dx.doi.org/10.1044/jshr.3901.43.

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Research on the relationship between early otitis media with effusion (OME), language impairment, and central auditory processing has been equivocal. Identification and discrimination tasks provide us with a sensitive method of assessing speech perception on both an auditory and a phonetic level. The present study examined identification and discrimination of initial bilabial stop consonants differing in voicing by 9-year-old children with a history of severe OME. The groups studied were controlled for language impairment. The ability of these children to perceive major and minor voicing cues

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Koch, Dawn Burton, Therese J. McGee, Ann R. Bradlow, and Nina Kraus. "Acoustic-Phonetic Approach toward Understanding Neural Processes and Speech Perception." Journal of the American Academy of Audiology 10, no. 06 (1999): 304–18. http://dx.doi.org/10.1055/s-0042-1748502.

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AbstractThis review paper describes an “acoustic-phonetic” experimental approach aimed at understanding normal and abnormal speech perception processes from both a behavioral and an electrophysiologic perspective. First, we consider the relevant acoustic characteristics of speech and identify a set of acoustic-phonetic classes that represent the parameters most important for making an acoustic signal sound like speech. Second, we review what is known about the neurophysiologic representation of acoustic-phonetic speech parameters in animal and human subjects. Third, we describe how an acoustic

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Qi, Wenfa, Yuxin Liu, Sirui Guo, Xiang Wang, and Zongming Guo. "An Adaptive Visible Watermark Embedding Method based on Region Selection." Security and Communication Networks 2021 (March 3, 2021): 1–11. http://dx.doi.org/10.1155/2021/6693343.

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Aiming at the problem that the robustness, visibility, and transparency of the existing visible watermarking technologies are difficult to achieve a balance, this paper proposes an adaptive embedding method for visible watermarking. Firstly, the salient region of the host image is detected based on superpixel detection. Secondly, the flat region with relatively low complexity is selected as the embedding region in the nonsalient region of the host image. Then, the watermarking strength is adaptively calculated by considering the gray distribution and image texture complexity of the embedding r

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Morriss, Robert H., and William P. Dunlap. "Joint Effects of Chroma and Value on Spatial Balance of Color Pairs." Empirical Studies of the Arts 6, no. 2 (1988): 117–26. http://dx.doi.org/10.2190/46m2-30kp-ca57-arqv.

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Previous research has shown that for two areas of color to appear spatially balanced, small areas of high chroma (saturation) balance larger areas of low chroma. For colors of different value (lightness), subjects prefer a narrow band of either the light or the dark color, avoiding equal areas when values differ. Theories of color balance [1,2] treat both value and chroma; therefore, the purpose of the present research was to study spatial balance of stimuli that varied in both aspects. Value and chroma were varied in equal Munsell steps (Experiment 1), and in approximately equal perceptual un

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Bo, Elena, Louena Shtrepi, David Pelegrín Garcia, Giulio Barbato, Francesco Aletta, and Arianna Astolfi. "The Accuracy of Predicted Acoustical Parameters in Ancient Open-Air Theatres: A Case Study in Syracusae." Applied Sciences 8, no. 8 (2018): 1393. http://dx.doi.org/10.3390/app8081393.

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Nowadays, ancient open-air theatres are often re-adapted as performance spaces for the additional historical value they can offer to the spectators’ experience. Therefore, there has been an increasing interest in the modelling and simulation of the acoustics of such spaces. These open-air performance facilities pose several methodological challenges to researchers and practitioners when it comes to precisely measure and predict acoustical parameters. Therefore this work investigates the accuracy of predicted acoustical parameters, that is, the Reverberation Time (T20), Clarity (C80) and Sound

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LU, ZHONGKANG, and ZHERU CHI. "COMPUTATIONAL VISUAL SENSITIVITY MODELS — A REVIEW." International Journal of Information Acquisition 01, no. 04 (2004): 357–69. http://dx.doi.org/10.1142/s0219878904000331.

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The Human Visual Systems (HVSs) is imperfect and contains highly selective visual acquisition sensors. Not all useful information presented to human eyes can be perceived. Generally, a technique to determine whether a signal can be perceived and how well it can be perceived is called human visual sensitivity analysis. More than one hundred years of psychophysical research on HVSs has revealed that human visual sensitivity is not only determined by local characteristics of visual contents (luminance, contrast orientation, spatial and temporal frequency), but also global modulatory factors (visu

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Anderson, Ryan, Yi Shen, and William P. Shofner. "Pitch-timbre interactions as measured in discrimination and the frequency-following response." Journal of the Acoustical Society of America 151, no. 4 (2022): A258—A259. http://dx.doi.org/10.1121/10.0011255.

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Perceptual interactions between pitch and timbre have been demonstrated repeatedly using discrimination tasks in psychoacoustics. The current study investigates whether the pitch-timbre interaction is reflected in neural signatures of pitch encoding in the brainstem. Listeners discriminated the pitch of harmonic tone complexes with low- or high-spectral centroids (SC) in a yes/no task. Fundamental frequency (F0) varied by one just noticeable difference (JND), while SC could be varied by two- or five- JNDs. Discrimination performance increased when both F0 and SC were higher as opposed to when

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Krueger, Lester E. "Reconciling Fechner and Stevens: Toward a unified psychophysical law." Behavioral and Brain Sciences 12, no. 2 (1989): 251–67. http://dx.doi.org/10.1017/s0140525x0004855x.

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AbstractHow does subjective magnitude, S. increase as physical magnitude or intensity, I, increases? Direct ratings (magnitude scales; partition or category scales) can be fitted by the power function, S = aIb, in which S equals I raised to a power or exponent, b, and multiplied by a measure constant, a. The exponent is typically about twice as large for the magnitude scale (Stevens) as for the corresponding partition or category scale, but the higher exponent may be explained by the overly expansive way people use numbers in making magnitude estimations. The partition or category scale and th

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Ross, Helen, and Nicholas Wade. "Fechner's Elusive Parallel Law." Seeing and Perceiving 23, no. 4 (2010): 335–48. http://dx.doi.org/10.1163/187847510x523973.

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AbstractWeber's Law states that the differential threshold or just-noticeable-difference (jnd) is proportional to the physical intensity of the stimulus. Fechner built up his logarithmic law of sensation intensity from Weber's Law and the assumption that all jnds are subjectively equal. He thought it important that the Parallel Law should also hold. The Parallel Law states that, when perceived stimulus intensity is changed by something other than physical intensity (such as adaptation), Weber's Law continues to hold: discrimination should be unchanged provided the perceived values of the two s

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Wu, Han Yan, Yan Wei Li, Jean Ne Chen, and Wien Hong. "Reversible Data Hiding Considering Shifting Direction and Human Visual Sensitivity." Advanced Engineering Forum 6-7 (September 2012): 422–27. http://dx.doi.org/10.4028/www.scientific.net/aef.6-7.422.

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In view of the technique “A New Histogram Modification Based Reversible Data Hiding Algorithm Considering the Human Visual System” by Jung et al., some modifications have been made on the parts of the causal window and the pixel overflow/underflow in present study. In Jung et al.’s method, the number of reference pixel was obtained based on a causal window so that the prediction value, the just noticeable difference (JND) and others can be determined. However, the causal window used in Jung et al.’s method may reduce the prediction accuracy. In this paper, the modifications on two parts are pr

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de Mesquita, Bruno Ribeiro, C. Ferreira, and Divanizia do Nascimento Souza. "Quality Control of Display Devices for Medical Radiodiagnosis Employing the Standard TG18, GSDF and JND." Open Medical Devices Journal 6, no. 1 (2018): 21–32. http://dx.doi.org/10.2174/1875181401806010021.

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Introduction: This work presents a study on the procedures for evaluating the quality of imaging display devices in radiology, considering the characteristic luminance curve obtained experimentally versus the Just Noticeable Difference (JND) and the lifetime of digital display devices. Materials & Methods: The evaluations were done using image patterns published by the American Association of Physicists in Medicine on Digital Imaging and Communication in Medicine (DICOM) and the Grayscale Standard Display Function (GSDF), viewed in DICOM software, with various shades of gray. A digital lux

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Cabbage, Kathryn, Thomas Carrell, Melannee Ipsen, and Elaine R. Hitchcock. "The perception of synthetic speech versus natural speech stimuli in adult listeners." Journal of the Acoustical Society of America 151, no. 4 (2022): A263. http://dx.doi.org/10.1121/10.0011279.

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The majority of speech perception research investigates interpersonal perception through presentation of two types of stimuli: synthetic speech and/or natural speech. Synthetically created speech stimuli allows for precisely controlled manipulation of individual acoustic variables, but can sound unnatural calling into questions its ecological validity. Alternatively, natural speech preserves the full complement of redundant acoustic cues yet limits control of specific acoustic parameters. In this study, we investigate speech discrimination comparing perception of specified acoustic parameters

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Lu, Jian, Yuru Zou, Chaoying Yang, and Lijing Wang. "A Robust Fractal Color Image Watermarking Algorithm." Mathematical Problems in Engineering 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/638174.

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One of the main objectives of watermarking is to achieve a better tradeoff between robustness and high visual quality of a host image. In recent years, there has been a significant development in gray-level image watermarking using fractal-based method. This paper presents a human visual system (HVS) based fractal watermarking method for color images. In the proposed method, a color pixel is considered as a 3-D vector inRGBspace. And a general form of 3 × 3 matrix is utilized as the scaling operator. Meanwhile, the luminance offset vector is substituted by the range block mean vector. Then an

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