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lightning

On July 23, 2019, the most spectacular lightning storm that I've ever seen rolled through Spokane. I managed to capture 15 minutes' worth of video. Rather than pick out the most striking stills manually, I took the opportunity to acquaint myself with OpenCV, and wrote some code that automatically extracts frames whose brightness exceeds a given threshold. (Well, more precisely, it extracts a frame if the proportion of the frame's pixels that fall within prescribed regional and brightness bounds exceeds a given threshold.)

For the 10-second, potentially seizure-inducing result of this endeavor, check out data/flashes.mp4. ⚡

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