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maybe a simple cv.resize() / cv.absdiff() will already do the job,

however, there is a decent cnn based method here , have a look

(it probably already does everything you wanted)

assuming, you're using opencv.js (we cannot help you with native node bindings), maybe a simple cv.resize() / cv.absdiff() will already do the job,

however, there is a decent cnn based method here , have a look

(it probably already does everything you wanted) wanted)

assuming, you're using opencv.js (we cannot help you with native node bindings), maybe a simple cv.resize() / cv.absdiff() / cv.sum() will already do the job,

however, there is a decent cnn based method here , have a look

(it probably already does everything you wanted)