In this paper we address the problem of understanding the cortical processing of color information. Unravelling the cortical representation of color is a difficult task, as the neural pathways for color processing have not been fully mapped, and there are few computational modelling efforts devoted to color. Hence, we first present a conjecture for an ideal target color map based on principles ...

Purpose The measurement of achromatic sensitivity has been an important tool for monitoring subtle changes in vision as the result of disease or response to therapy. In this study, we aimed to provide a normative data set for achromatic and chromatic contrast sensitivity functions within a common cone contrast space using an abbreviated measurement approach suitable for clinical practice. In ad...

This review summarizes recent work relevant to receptive field structure of cells of the parvocellular (PC) and (MC) magnocellular pathways in the primate. In the PC-pathway, recent data suggest that different color- and cone-opponent ganglion cells make up specific anatomical classes with specific cone connectivities and bipolar cell input. For example, blue-on ganglion cells have been identif...

This study investigates the contribution of color vision to global motion. We present evidence demonstrating that performance on a global motion task attains similar levels for both types of chromatic (L/M-cone opponent and S-cone opponent) and luminance stimuli at suprathreshold contrasts. We show, however, that the motion thresholds for isoluminant chromatic stimuli are luminance based, on th...

A longstanding and unresolved question is how observers construct a discrete set of color categories to partition and label the continuous variations in light spectra, and how these categories might reflect the neural representation of color. We explored the properties of color naming and its relationship to color appearance by analyzing individual differences in color-naming and hue-scaling pa...

Human being can perceive natural scenes very well under various illumination conditions. Partial reasons are due to the contrast enhancement of center/surround networks and opponent analysis on the human retina. In this paper, we propose an image enhancement model to simulate the color processes in the human retina. Specifically, there are two center/surround layers, bipolar/horizontal and gang...

We optimize the noise shaping behavior of color error diffusion by designing an optimized error lter based on a proposed noise shaping model for color error di usion and a generalized linear spatially-invariant model of the human visual system. Our approach allows the error lter to have matrix-valued coe cients and di use quantization error across channels in an opponent color representation. T...