Software that would give me the resulting color depending

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Discussion Overview

The discussion revolves around the search for software that can calculate the resulting color based on the luminances of different colors, specifically in terms of their wavelengths and proportions. The scope includes conceptual understanding of color perception and the relationship between light and color representation.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant seeks software to determine the resulting color from specific proportions of red, green, and blue light.
  • Another participant suggests that luminance is a measure integrated over wavelengths and proposes that the term "radiance" may be more appropriate.
  • A different viewpoint argues that the question may be ill-posed, as color perception is influenced by non-linear responses to different wavelengths.
  • One participant recommends converting between color spaces, such as RGB to HSV, as a potential method for addressing the question.
  • Another participant emphasizes that the problem is more related to physics than programming, suggesting a shift in the inquiry's focus.

Areas of Agreement / Disagreement

Participants express differing views on the nature of the problem, with some focusing on the software aspect while others emphasize the underlying physics of color perception. No consensus is reached regarding the best approach to the question.

Contextual Notes

There are unresolved assumptions regarding the definitions of luminance and radiance, as well as the complexity of color perception. The discussion highlights the need for clarity in the relationship between light properties and perceived color.

penguin007
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(Sorry if this message isn't in the right place, I couldn't find any other)

Hi,
I'm looking for a software that would give me the resulting color depending on the luminances of other colors (for instance 30% of red (680 nm) + 59% of green (545nm) + 11%of blue (440 nm) gives a white color).

Thanks for the help.
 
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penguin007 said:
Hi,
I'm looking for a software that would give me the resulting color depending on the luminances of other colors (for instance 30% of red (680 nm) + 59% of green (545nm) + 11%of blue (440 nm) gives a white color).

Thanks for the help.

1) Luminance is a perceptual measure of light integrated over wavelength, it doesn't really make sense to talk about luminance in individual wavelengths because luminance is a quantity integrated over wavelength. I think the word you are looking for is radiance.

2) I believe the question is ill-posed because you assume that the perceived color is determined only by the proportion of radiant light in each wavelength...whereas I believe the perception of each wavelength is non-linear.

3) Anyway, I think your question may be best answered by simply converting between color spaces...such as, convert from RGB into HSV color space. Conversation equations are here,

http://en.wikipedia.org/wiki/HSL_and_HSV

By the way, this isn't really a software question as nobody is going to design a piece of software for such a basic calculation.
 


Thanks for this explanation but I still do not understand everything:
Supposing that we light up the same surface of an optical system (the eye) by two different monochromatic lights (each one characterized by a wavelength and intensity): Can we predict the color that will be perceived by the eye?
 


I believe that is possible, but it is not a programming problem so much as a physics problem. Try asking in the Physics areas.
 

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