The machinery of colour vision

  title={The machinery of colour vision},
  author={Samuel G. Solomon and Peter Lennie},
  journal={Nature Reviews Neuroscience},
Some fundamental principles of colour vision, deduced from perceptual studies, have been understood for a long time. Physiological studies have confirmed the existence of three classes of cone photoreceptors, and of colour-opponent neurons that compare the signals from cones, but modern work has drawn attention to unexpected complexities of early organization: the proportions of cones of different types vary widely among individuals, without great effect on colour vision; the arrangement of… 

Evolution of colour vision in mammals

  • G. H. Jacobs
  • Biology, Environmental Science
    Philosophical Transactions of the Royal Society B: Biological Sciences
  • 2009
The evolution of colour vision among the mammals is viewed, viewing that process in the context of relevant biological mechanisms, of variations in mammalian colour vision, and of the utility of color vision.

Randomly weighted receptor inputs can explain the large diversity of colour-coding neurons in the bee visual system

The results support the idea that the insect nervous system might adopt partially random wiring of neurons for colour processing, and reproduce the physiological spectral tuning curves of the 22 neurons that have been described so far.

The time-course of colour vision.

It is found that perfect constancy is not achieved instantaneously after an illuminant chromaticity shift and that constancy of colour appearance judgements increases over several seconds, and it is argued that these differences reveal the adaptation response of central colour mechanisms.

Colour: an algorithmic approach

A paradigm of colour as functional information of an artificial computational visual system is proposed, a simplified artificial colour sensor processing system is presented and parallels are drawn between how this system processes information and how the humanvisual system is known to process information.

Neural mechanisms of chromatic and achromatic vision

A model for neural processing of color and brightness/ lightness information that starts in the cone receptors and continues in the opponent cells of the retina, LGN, and visual cortex is described and a way in which the brain might combine inputs from the geniculate to obtain correlates of chromatic and achromatic color vision and of brightness/lightness perception is suggested.

Primate color vision: A comparative perspective

Investigations focused on naturally occurring variations in color vision in a wide range of nonhuman primate species have proven to be particularly valuable and are yielding valuable insights into the evolution of color vision.

Physiology of Color Vision in Primates

  • R. Shapley
  • Biology
    Oxford Research Encyclopedia of Neuroscience
  • 2019
Color perception in macaque monkeys and humans depends on the visually evoked activity in three cone photoreceptors and on neuronal post-processing of cone signals, which are subdivided into classes of single-opponent cells and double-opp opponent cells.

The elementary of spatial and color vision in the human retina.

The results are consistent with the idea that the nervous system encodes high-resolution achromatic information and lower-resolution color signals in separate pathways that emerge as early as the first synapse.

The elementary representation of spatial and color vision in the human retina

The results are consistent with the idea that the nervous system encodes high-resolution achromatic information and lower-resolution color signals in separate pathways that emerge as early as the first synapse.

A neuronal circuit for colour vision based on rod–cone opponency

A genetically identified type of mouse retinal ganglion cell called JAMB, found to have colour-opponent responses, OFF to ultraviolet (UV) light and ON to green light, is found, and the rod signal in this circuit is antagonistic to that from cones.



Mechanisms of color vision.

The provision of color constancy and the ability to segment scenes are perhaps the foremost concerns of chromatic mechanisms, and recent psychophysical work bearing on these problems offers physiologists clearer guidance on what to seek with their electrodes.

Parallel visual pathways: A review

The arrangement of the three cone classes in the living human eye

Adaptive optics and retinal densitometry are combined to obtain the first images of the arrangement of S, M and L cones in the living human eye, allowing the sharpest images ever taken of the living retina.

The spatial arrangement of cones in the primate fovea

Direct microspectrophotometric measurements of patches of foveal retina from Old World monkeys are made, and it is reported here that the distribu tion of long- and middle-wave cones is locally random.

The coding of uniform colour figures in monkey visual cortex

The results from V2 were similar to those from upper‐layer V1, indicating that cortical processing does not strive to separate form and colour information, and the frequency of oriented colour cells and their ability to code edge polarity indicate that these cells play a major role in the representation of surface colour.