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.

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.

The Uses of Colour Vision: Ornamental, Practical, and Theoretical

Research in the psychology of colour demonstrates that colour vision is integral to a variety of visual processes, helping us to perform many types of visual tasks, and its implications for philosophical theories of colour are considered.



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.

An opponent-process theory of color vision.

Throughout some hundred years since the original formulation of the idea, a continued series of attempts has been made to find the proper transformation of the three measured colormixture curves that will bridge the gap and yield the unique spectral distribution curves of the desired physiological correlates of theThree postulated "fundamental" color sensations.

Temporal dynamics of chromatic tuning in macaque primary visual cortex

This work proposes that the sparse, S-opponent signal in the lateral geniculate nucleus is amplified in area V1, possibly through recurrent excitatory networks, and results in a delayed, sluggish cortical S-cone signal which is then integrated with L/M-opp opponent signals to rotate the lateralgeniculated nucleus chromatic axes.

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.

Chromatic sensitivity of ganglion cells in the peripheral primate retina

It is shown that most peripheral PC cells have red–green modulation sensitivity close to that of foveal PC cells, incompatible with the view that PC pathway cells in peripheral retina make indiscriminate connections with retinal circuits devoted to different spectral types of cone photoreceptors.

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.