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Emyr in reply to @paradroid

Wouldn't it be better to do shape detection before comparing? That way clouds shouldn't matter.

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paradroid in reply to @Emyr

Actually I'm just using a summed luminance channel difference between consecutive frames, with noise reduction by ignoring per pixel differences under a specified limit. Very naive implementation but seems to work well enough. It's also very light on the cpu, ran fine even on Raspberry Pi.

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