Saliency – Based Color Accessibility
Saliency – Based color accessibility
Saliency-based color accessibility,Perception of color varies markedly between individuals because of differential expression of photopigments in retinal cones. However, it has been difficult to quantify the individual cognitive variation in colored scene and to predict its complex impacts on the behaviors. Moreover, saliency-guided image manipulations sufficiently compensated for individual differences in saliency.
This visual saliency approach allows for quantification of information extracted from complex visual scenes
The exclusivity of subjective experience partly depends on individual differences in sensory perception.
For example, congenital differences in the expression of color-sensitive photopigments alter individual’s perception of complex visual scenes.
Thus, differences with regard to visual perception exist among individuals. A majority of humans are trichromatic, i.e., different colors are encoded by the population-activity of long-wavelength (L)-, middle-wavelength (M)-, and short-wavelength (S)-sensitive cones.Observers lacking one class of photopigments are deficient in their ability to discriminate colors; i.e., they are blind to the difference between a certain pair of colors, such as red or green.This divergence in color vision is a major consequence of genetic polymorphisms.
This can be interpreted as the distance between for the two saliency maps, measured from observer Oi to observer Oj . Note that the above measure takes zero value only if P(r|Oi;I)=P(r|Oj;I) for every r . We proposed a new approach for quantifying and presenting interobserver differences in perceptual experience because of individual variations in spectral sensitivity. The two psychophysical experiments showed the plausibility of the proposed approach. These experiments revealed a strong statistical relationship between saliency loss or gain and the subjective judgment of saliency.