Visual System: what signals the Millions of Colors

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SUMMARY

The discussion centers on the mechanisms of color recognition in the visual system, specifically addressing the roles of retinal cells and cortical areas such as V4 and the inferior temporal cortex (IT). It is established that rods, previously thought to only process light and dark stimuli, also contribute to color perception. The conversation references the work of S. Zeki and L. Marini, highlighting three cortical stages of color processing in the human brain. Additionally, the conversion of RGB pixel values (256,256,256) to the activation of rods and cones is a key point of inquiry.

PREREQUISITES
  • Understanding of retinal cell functions in color perception
  • Familiarity with the roles of V4 and IT in the visual cortex
  • Knowledge of the RGB color model and its application in digital imaging
  • Awareness of the latest research on rod function in color processing
NEXT STEPS
  • Research the role of V4 in color processing and its neural pathways
  • Explore the implications of S. Zeki and L. Marini's findings on color perception
  • Investigate methods for converting RGB values to physiological responses in rods and cones
  • Study the integration of rod and cone signals in visual processing
USEFUL FOR

Neuroscientists, vision researchers, and anyone interested in the intricacies of color perception and visual processing in the human brain.

neurocomp2003
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Where in the visual system does one begin to recognize the millions of Colors in the visual spectrum? Do the retinal cells differentiate between them?
Or are generic signals carried to the Color Zones(??V4??/IT) where they are differentiated?

How would one convert (256,256,256) pixel colors to on/off rods and cones?
 
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neurocomp2003 said:
Where in the visual system does one begin to recognize the millions of Colors in the visual spectrum? Do the retinal cells differentiate between them?
Or are generic signals carried to the Color Zones(??V4??/IT) where they are differentiated?

How would one convert (256,256,256) pixel colors to on/off rods and cones?

You're right to include the rods with cones when discussing colour processing and recognition in the brain because, just recently, rods were shown to discern colour while also processing black and white (light and dark) stimulus.

There are three cortical stages of colour processing in the human brain (S Zeki, L Marini)

http://brain.oxfordjournals.org/cgi/reprint/121/9/1669.pdf
 

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