The concept of color space has come to be an unquestioned threedimensional representation of color stimuli, or color appearance, intended to simplify the relationships among physically measurable attributes of light, mathematical formulae, and human sensations and perceptions. The notion of three-dimensional mathematical spaces as adjuncts for color is often helpful, but perhaps also misleading...

A new image appearance model, designated as iCAM06, has been developed for the applications of high-dynamic-range (HDR) image rendering and color image appearance prediction. The iCAM06 model, based on the iCAM framework, incorporates the spatial processing models in the human visual system for contrast enhancement, photoreceptor light adaptation functions that enhance local details in highligh...