Interesting article except it is filled with significant errors.

First, “Luminosity” is light over time, used often in astronomy. For colorimetry as you are discussing, the correct term is luminance. But that’s just semantics, let’s consider the actual science, You stated:

These receptors are the “Cone Cells” which handle the chroma and the “Rod Cells” which handle the luminosity.

INCORRECT. Rod cells function at very low light levels ONLY, and their purpose is to provide “night vision” for when it is very dark. Rods are saturated at photopic (daylight) levels, and not used for sensing daylight luminance.

Cone cells are tuned to one of three bands of light wavelengths, short, medium, or long — we perceive those three bands as either blue, green, or red respectively. Those three cone types are responsible for photopic (daylight) vision, both color AND luminance.

The opponent color process takes the cone’s responses and maps them to three dimensions: Red/Green, Blue/Yellow, Black/White. These are sent over the optic nerve to the visual cortex which then processes the signals into the perceptions of color and contrast.

The reason the image of the car “pops” is because of contrast.

Lightness and contrast are context sensitive perceptions of differences in luminance, and luminance is a measure of luminous intensity of light.

Color, as in hue and saturation, is a context sensitive perception of a combination of (or a specific) light frequencies or wavelengths. The dominant wavelength is what we perceive as the hue. The distance from white is what we perceive as saturation.

The rest of your article is similarly incorrect, but I don’t have the time at the moment to provide a sentence by sentence correction — just the advice that you consider reviewing your article regarding color and perception. Wikipedia has ample and generally correct information on the subject.



Color-Obsessed Researcher, Investigative Journalist & Columnist, Hollywood Actor, Filmmaker, & 3x Emmy® Winner, and Itinerant Technology Evangelist