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Logo black or white depending on background brightness
Hi.
I want an expression to make a logo become black or white depending on the background brightness (dark=white logo, bright=black logo).
I guess that one could use “sample image” in some sort of a way. Please enlighten me.
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2 Replies
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One way would be to have a light logo with an opacity expression like this:
bg = thisComp.layer(“background”);
rgb = bg.sampleImage([bg.width,bg.height]/2,[bg.width,bg.height]/2);
hsl = rgbToHsl(rgb);
if (hsl[2] > .5) 0 else 100and an expression like this on the dark logo:
bg = thisComp.layer(“background”);
rgb = bg.sampleImage([bg.width,bg.height]/2,[bg.width,bg.height]/2);
hsl = rgbToHsl(rgb);
if (hsl[2] > .5) 100 else 0Or you could use a similar concept to control the fill color of a single logo like this:
bg = thisComp.layer(“background”);
rgb = bg.sampleImage([bg.width,bg.height]/2,[bg.width,bg.height]/2);
hsl = rgbToHsl(rgb);
if (hsl[2] > .5) [0,0,0,1] else [1,1,1,1]Dan
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That did the trick. Thanks a lot.
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