When I using still images to make a video, the result landmark coordinates are still changing

Question

When I using still images to make a video, the result landmark coordinates are still changing

oUp2Uo opened this issue 2 years ago · comments

Hello, I tried to use still images to make a video, the result landmark coordinates are still changing (not stable).
(using video 1920x1080)
Is this correct?

And one more thing, I found it seems that left iris result landmark is not as correct as right one.
I am not sure about this point, and I will take more tests.

Thanks.

pntt3011 · Answer 1 · Tue Nov 15 2022 17:39:51 GMT+0800 (China Standard Time)

Hi, the unstable results, even from still images, are expectable. There are some issues about it in Mediapipe's repo, like this one.

You can use the mean of the last N outputs or exponential moving average as a workaround.
I hope this will help.

oUp2Uo · Answer 2 · Wed Nov 16 2022 10:00:58 GMT+0800 (China Standard Time)

Thanks for your reply.

Btw, do you have any idea about the difference of left and right iris result landmark?

pntt3011 · Answer 3 · Wed Nov 16 2022 22:56:07 GMT+0800 (China Standard Time)

Both eyes use the same model to detect so in theory, there should be no signicantly different between their outputs. Mediapipe paper also does not mention anything about the model should be used on left or right eye.