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Index › Programming Questions & Help › Syntax Questions › PImage.mask() -- Why use Blue
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PImage.mask() -- Why use Blue? (Read 372 times)
flight404
PImage.mask() -- Why use Blue?
Apr 26th, 2006, 8:10pm  
Why does mask reference the blue instead of brightness?  Is this standard for image masks?  Does brightness actually do a bunch of calculation with R, G, and B so blue is faster?
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Robert Hodgin {flight404}&&
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fry
Re: PImage.mask() -- Why use Blue?
Reply #1 - Apr 27th, 2006, 3:19am  
just cuz it's cheap and easy and works well enough most of the time. if you want more accurate, use filter(GRAY) on the image first, which will do a proper luminance calculation. or if you want brightness, you can iterate through the pixels and take max(r, g, b). we should probably add that to the reference if it's not there already.
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