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Real-Time Temporal-Coherent Color Contrast Enhancement for Dichromats

Gustavo M. Machado, Manuel M. Oliveira
2010 Computer graphics forum (Print)  
Our approach can be efficiently implemented on GPUs, and we show that for typical image sizes it is up to two orders of magnitude faster than the current stateof-the-art technique.  ...  We present an automatic image-recoloring technique for enhancing color contrast for dichromats whose computational cost varies linearly with the number of input pixels.  ...  The "Dichromat" column shows the simulated perception of dichromats for the corresponding "Reference" image obtained using the approach of Machado et al. [MOF09] .  ... 
doi:10.1111/j.1467-8659.2009.01701.x fatcat:24ph344ggfhjjbe2yyodtgssom

An Efficient Naturalness-Preserving Image-Recoloring Method for Dichromats

G.R. Kuhn, M.M. Oliveira, L. Fernandes
2008 IEEE Transactions on Visualization and Computer Graphics  
While previous techniques approach this problem by potentially changing all colors of the original image, causing their results to look unnatural to color vision deficients, our approach preserves, as  ...  We present an efficient and automatic image-recoloring technique for dichromats that highlights important visual details that would otherwise be unnoticed by these individuals.  ...  The natural images (except Figure 4 , which is from [24] , and the green and red apples) are from [15] . The InfoVis images are from http://commons.wikimedia.org.  ... 
doi:10.1109/tvcg.2008.112 pmid:18989034 fatcat:jyvk53vyrfg7bex2kosaunqq4m

Optimizing colour for camouflage and visibility using deep learning: the effects of the environment and the observer's visual system

J. G. Fennell, L. Talas, R. J. Baddeley, I. C. Cuthill, N. E. Scott-Samuel
2019 Journal of the Royal Society Interface  
Here for the first time, using image processing techniques to embed targets into realistic environments together with psychophysics to estimate detectability and deep neural networks to interpolate between  ...  sampled colours, we propose a method to identify the optimal colour that either minimizes or maximizes visibility.  ...  We thank Jasmina Stevanov for her help with the image acquisition in Spain and two anonymous referees for their helpful suggestions that improved the manuscript.  ... 
doi:10.1098/rsif.2019.0183 pmid:31138092 pmcid:PMC6544896 fatcat:dcqeh5vymjdiri4usaefd7zjqe

Spectral Dichromatic Parameter Recovery from Two Views via Total Variation Hyper-priors [chapter]

Filippo Bergamasco, Andrea Torsello, Antonio Robles-Kelly
2017 Lecture Notes in Computer Science  
The approach is based on the minimization of an energy functional linking the dichromatic model to the image appearances and the flow between the images to the factorized reflectance component.  ...  In this paper, we propose an approach for the recovery of the dichromatic model from two hyperspectral or multispectral images, i.e., the joint estimation of illuminant, reflectance, and shading of each  ...  of the dichromatic parameters, relating the reflectance to the optical flow between multiple images.  ... 
doi:10.1007/978-3-319-54407-6_21 fatcat:dt5yddjkhrexfn4kkt76t6e6ki

Optimising the Choice of Colours of an Image Database for Dichromats [chapter]

Vassili Kovalev, Maria Petrou
2005 Lecture Notes in Computer Science  
and dichromats is minimised.  ...  Colour appears to gradually play more and more significant role in the modern digital world.  ...  One approach would have been to map all colours in such a way that they will appear as distinct as possible to a dichromat.  ... 
doi:10.1007/11510888_45 fatcat:kub5fx2x2ndydlxqmlvnezd7sm

Optimising colour for camouflage and visibility using deep learning: the effects of the environment and the observer's visual system [article]

J.G. Fennell, L. Talas, R.J. Baddeley, I.C. Cuthill, N.E. Scott-Samuel
2018 bioRxiv   pre-print
Here for the first time, using image processing techniques to embed targets into realistic environments together with psychophysics to estimate detectability and deep neural networks to interpolate between  ...  dichromats, typical for non-human mammals.  ...  Discussion Based on an approach using simple image synthesis, psychophysics, and deep neural networks for interpolation, we identified the optimal colours for camouflage and conspicuity, an approach not  ... 
doi:10.1101/428193 fatcat:nmca3ewpqjbdfd3jf7lecnlpni

Optimal design of photoreceptor mosaics: Why we do not see color at night

JEREMY R. MANNING, DAVID H. BRAINARD
2009 Visual Neuroscience  
The formulation evaluates each mosaic under the assumption that its output is processed to optimally estimate the image.  ...  We are able to demonstrate a set of assumptions under which the prevalent biological pattern represents optimal processing.  ...  Rieke, and two anonymous reviewers for useful comments on this work or pointers to relevant literature. Supported by NEI RO1 EY10016 and NIH RO1 MH61975.  ... 
doi:10.1017/s095252380808084x pmid:19193250 pmcid:PMC2671005 fatcat:jjpvdm7yjbd2lnmfppbyufgv2u

Key Color Priority Based Image Recoloring for Dichromats [chapter]

Chun-Rong Huang, Kuo-Chuan Chiu, Chu-Song Chen
2010 Lecture Notes in Computer Science  
In this paper, we present an image re-coloring algorithm for dichromats according to the key color priority.  ...  Moreover, our approach can preserve both the color contrast and naturalness efficiently and effectively according to the key color priority.  ...  [15] proposed a successful approach to simulate what dichromats see, it is a non-linear mapping function in CIEL*a*b* color space.  ... 
doi:10.1007/978-3-642-15696-0_59 fatcat:h373mfbj55awresfgtkwgxwify

Optimal Solution of the Dichromatic Model for Multispectral Photometric Invariance [chapter]

Cong Phuoc Huynh, Antonio Robles-Kelly
2008 Lecture Notes in Computer Science  
In this paper, we address the problem of photometric invariance in multispectral imaging making use of an optimisation approach based upon the dichromatic model.  ...  The algorithm is shown to be robust, and since the cost function is convex in nature, the resulting solution is globally optimal.  ...  Conclusions This paper has discussed an optimisation approach to the photometric invariance problem from a single multispectral image.  ... 
doi:10.1007/978-3-540-89689-0_42 fatcat:lwxm3d3hn5d73aw74r7c3jbp3y

A Probabilistic Approach to Spectral Unmixing [chapter]

Cong Phuoc Huynh, Antonio Robles-Kelly
2010 Lecture Notes in Computer Science  
In this paper, we present a statistical approach to spectral unmixing with unknown endmember spectra and unknown illuminant power spectrum.  ...  The method is formulated as a simultaneous process of illuminant power spectrum prediction and basis material reflectance decomposition via a statistical approach based upon deterministic annealing and  ...  [5] proposed an energy minimisation approach to estimating both the illumination and reflectance from images.  ... 
doi:10.1007/978-3-642-14980-1_33 fatcat:mjpzrz63pnh3jaxmglizoqdk4u

Temporal Color Consistency-Based Video Reproduction for Dichromats

Chun-Rong Huang, Kuo-Chuan Chiu, Chu-Song Chen
2011 IEEE transactions on multimedia  
Different from image re-coloring schemes, reproducing a video for dichromats requires maintaining temporal color consistency between frames, i.e., the same color in different frames should be re-colored  ...  to the identical new color.  ...  CONCLUSION We have proposed a novel video reproduction approach for dichromats. Compared with image-based re-coloring and Liu et al.'  ... 
doi:10.1109/tmm.2011.2135844 fatcat:ttmzwdjm7jaapm72hrp3lfcvvy

Supplementary Information from Optimizing colour for camouflage and visibility using deep learning: the effects of the environment and the observer's visual system

J. G. Fennell, L. Talas, R. J. Baddeley, I. C. Cuthill, N. E. Scott-Samuel
2019 Figshare  
Here for the first time, using image processing techniques to embed targets into realistic environments together with psychophysics to estimate detectability and deep neural networks to interpolate between  ...  sampled colours, we propose a method to identify the optimal colour that either minimizes or maximizes visibility.  ...  Pairwise post-hoc analysis revealed that in all conditions dichromat targets were harder to see than trichromat targets (Table S3) .  ... 
doi:10.6084/m9.figshare.8114105.v1 fatcat:i47qpwbl2jcbbbpy6vsbcfxixm

Specular Reflection Separation Using Dark Channel Prior

Hyeongwoo Kim, Hailin Jin, Sunil Hadap, Inso Kweon
2013 2013 IEEE Conference on Computer Vision and Pattern Recognition  
We present a novel method to separate specular reflection from a single image. Separating an image into diffuse and specular components is an ill-posed problem due to lack of observations.  ...  Existing methods rely on a specularfree image to detect and estimate specularity, which however may confuse diffuse pixels with the same hue but a different saturation value as specular pixels.  ...  To distinguish between diffuse and specular reflections from an observed image, most of approaches basically take into account the color information with the underlying dichromatic reflection model except  ... 
doi:10.1109/cvpr.2013.192 dblp:conf/cvpr/KimJHK13 fatcat:ybgdyvgqxvgnxcmrbkahdszepy

Color Image Enhancement for Dichromats by Additive Image Noise

Kakeru Wakimoto, Yasushi Kanazawa, Naoya Ohta
2013 IPSJ Transactions on Computer Vision and Applications  
Our method is applicable not only to artificial figures such as graphs but also to natural photographs. We show the effectiveness of our method by experiments.  ...  Our method compensates for the lost information along the degenerate direction in the color space with the amount of noise in the image.  ...  However, we can use the same approach for the dichromats of deuteranopes. Models of Additive Image Noise Generally, image noise does not depend on the position and/or values of a pixel in an image.  ... 
doi:10.2197/ipsjtcva.5.45 fatcat:k3lblsj5tva6jkn572vuyp45te

Adaptive color visualization for dichromats using a customized hierarchical palette

Carlos E. Rodríguez-Pardo, Gaurav Sharma, Reiner Eschbach, Gabriel G. Marcu, Alessandro Rizzi
2011 Color Imaging XVI: Displaying, Processing, Hardcopy, and Applications  
We apply our framework to situations involving viewers with common dichromatic color vision deficiencies, who face challenges in perceiving information presented in color images and graphics designed for  ...  As an illustration, we demonstrate the application of the methodology to Ishihara style images.  ...  CUSTOMIZED VISUALIZATION FOR DICHROMATS A customized visualization approach exploits individual user characteristics to create a representation that transmit as best as possible the information contained  ... 
doi:10.1117/12.872601 dblp:conf/clrimg/Rodriguez-Pardo11 fatcat:xh7bm3y7lfarbpzvnseu2obbqy
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