Publication

On Adaptive Non-Linarity for Color Discrimination and Chromatic Adaptation

Sabine Süsstrunk
2002
Conference Papers

Abstract

Assuming that the photoreceptor response of the human visual system is adaptive and non-linear, we can derive mathematical properties that can account for both color discrimination and chromatic adaptation. This could be due to the photoreceptors’ response to illumination, which is non-linear and varies according to the adaptation state. Assuming the Naka-Rushton nonlinear function and an automatic gain control function, we can derive color discrimination and chromatic adaptation data. We extend the discussion to a three layer model of retinal color processing, and show how we could predict corresponding color data.

Official source

https://infoscience.epfl.ch/entities/publication/a3d191a7-9863-4331-a44c-421b1e5b1df8

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Sabine Süsstrunk
2002
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/a3d191a7-9863-4331-a44c-421b1e5b1df8

About this result

Related concepts (32)

Photoreceptor cell

A photoreceptor cell is a specialized type of neuroepithelial cell found in the retina that is capable of visual phototransduction. The great biological importance of photoreceptors is that they convert light (visible electromagnetic radiation) into signals that can stimulate biological processes. To be more specific, photoreceptor proteins in the cell absorb photons, triggering a change in the cell's membrane potential. There are currently three known types of photoreceptor cells in mammalian eyes: rods, cones, and intrinsically photosensitive retinal ganglion cells.

Adaptation (eye)

In visual physiology, adaptation is the ability of the retina of the eye to adjust to various levels of light. Natural night vision, or scotopic vision, is the ability to see under low-light conditions. In humans, rod cells are exclusively responsible for night vision as cone cells are only able to function at higher illumination levels. Night vision is of lower quality than day vision because it is limited in resolution and colors cannot be discerned; only shades of gray are seen.

Visual system

The visual system comprises the sensory organ (the eye) and parts of the central nervous system (the retina containing photoreceptor cells, the optic nerve, the optic tract and the visual cortex) which gives organisms the sense of sight (the ability to detect and process visible light) as well as enabling the formation of several non-image photo response functions. It detects and interprets information from the optical spectrum perceptible to that species to "build a representation" of the surrounding environment.

Related publications (5)

On Adaptive Non-Linarity for Color Discrimination and Chromatic Adaptation

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