Programming problem RGB values in 1 value?
Hello everyone, I have a programming problem:
An image analysis program provides me with RGB values ([R, G, B])
as an array from 0 to 255 each.
However, I now have to convert these values into one that goes from 0 to 255.
For example, if I have the RGB value 255,0,0, that is in the single value: 0
if I have the RGB value 0,255,0 it is the value 85 and at 0,0,255 it is 170
and at 255 again 255,0,0
Does anyone have any idea how I can convert this?
(1 votes)
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The Colour to get, you can this answer to StackOverflow use. Only you need to multiply the result at the end with 42,66, not with 60, and add with a negative result 255 because the result should be between 0 and 255.
Ah, thank you I’ll try
Thanks, it worked!!!
If I understand correctly, you want to convert RGB to the HSV model, you just need h (hue).
https://de.wikipedia.org/wiki/HSV color space# Conversion_RGB_in_HSV/HSL
Yes, thank you, I didn’t know about it, but the values are slightly shifted:
RGB: [4,68,116] (Blue) = HSV: 206 != My program: 170
Is there a value to change that?
Probably because Hue is usually given as a value between 0 and 360, but you want a value between 0 and 255.
Does the HSV model not only have blue, black and white?