Color images provide large information for human visual perception compared to grayscale images. Color image enhancement methods enhance the visual data to increase the clarity of the color image. It increases human perception of information. Different color image contrast enhancement methods are used to increase the contrast of the color images. The Retinex algorithms enhance the color images ...

Studies of covert spatial attention have largely used motion, orientation, and contrast stimuli as these features are fundamental components of vision. The feature dimension of color is also fundamental to visual perception, particularly for catarrhine primates, and yet very little is known about the effects of spatial attention on color perception. Here we present results using novel dynamic c...

We examined whether perception of color saturation and lightness depends on the three-dimensional (3D) shape surface gloss surfaces rendered to have different hues. In Experiment 1, we parametrically varied specular roughness predominantly planar with mesoscopic relief heights. The orientation was relative light source observer. Observers matched perceived chroma (effectively saturation) using ...