A psychophysical experiment has been conducted to test the threshold of color difference in displayed images under different viewing conditions. Four ISO SCID 400 images N2, N3, N5 and N7 were used as test images, whose colors were altered in lightness, chroma and hue attributes systematically to form the test image pairs with the original ones. The average color difference in all image pairs r...

The most commonly used method for formally assessing grapheme-colour synaesthesia (i.e., experiencing colours in response to letter and/or number stimuli) involves selecting colours from a large colour palette on several occasions and measuring consistency of the colours selected. However, the ability to diagnose synaesthesia using this method depends on several factors that have not been direc...

BACKGROUND AND OBJECTIVE A cross-polarized diffuse reflectance (CDR) color imaging system was developed for quantitative evaluation of port wine stain (PWS) response to laser therapy. To obtain calibrated Commission International de l'Eclairage (CIE) color space images from RGB (red, green, and blue) images, it was necessary to derive an optimized conversion matrix specific to our imaging syste...

Color correction describes the transformation process between device RGB values and CIEXYZ resp. CIELab values. In every metamer color reproduction system this is the first color transformation after image acquisition. In general, this mapping is not unique since the spectral sensitivities of most of the devices do not satisfy the Luther condition and because the acquisition and viewing light s...

Tone reproduction is now widely used in the field of HDR imaging and image enhancement, especially to provide the proper luminance, so that captured images give the same sensation as the real scene. As a result, a high contrast and naturalness of colors can be obtained. In recent studies on tone reproduction with the objective of reproducing natural looking colors in digital images, an integrat...