What would be a computationally inexpensive way of finding the night-mode of an image in canvas?
Doesn't have to superb just fast way to turn an image from visiually day to night.
Thanks a ton.
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2Your question is too vague. Can you please explain in further detail what you mean by "night mode"?– Peter O.Commented Mar 11, 2018 at 23:23
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1 Answer
You'd have to experiment with different exact levels and values, but I'd desaturate the color, then dim the image, more strongly on the R and G components than the B component so that the resulting image was slightly blue-tinted.
Do you know how to draw an image into a canvas, grab the pixels, loop through the pixels to manipulate them, then draw them back?
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I was thinking more of making the dimming layer and just layering it on top of the picture which I think should be faster and yes I do know that. But it's interesting I thought it was an already solved problem in image processing with a defined algorithm but I guess not. Thanks. Commented Mar 11, 2018 at 8:00