[Outdated] Sensing Subtle Changes in the Face - Optical Flow for Micro Expression Spotting
Автор: Marcus Wentz
Загружено: 2019-12-02
Просмотров: 40
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Input video is masked with 68 point facial landmark detector. We modified the shape array to exclude the first 17 entries showing the jawline [which can be very noisy]. Masking is also done because dense optical flow is very noisy with the raw video because faces are generally homogeneous.
We then pass this masked image to dense optical flow and store each brightness value in an array to keep track of frames with most amount of motion. We sum of the frames as bins of 10 for this 200 fps video. Apex frame occurs with largest change in optical flow bin brightness in the first half of the output video.
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