Processing Video Frames with Markers

Question

Drew 2013-6-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/80354-processing-video-frames-with-markers

I have a large number of long video files and I need to go through and record certain frames that have a specific marker in them. The marker is a red checker pattern, and I have a reference image. The problem I am running into is that in the video the matching marker is often motion blurred or the color is skewed by lighting. I am also running into significant processing time problems trying to iterate through each frame of these half-hour videos. Ideally processing these videos would be faster than sitting and watching them at 60 fps. Any tips?

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Muthu Annamalai 2013-6-26

Have you considered a thresholding/grayscaling (i.e. convert frame from RGB to dual tone, 256-level gray image) of the frames before you apply a matched-filter correlator? This should avoid the biasing due to lighting.

But again I'm not a image processing expert, and this is a little hand-wavy advice :D

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Nitin 2013-6-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/80354-processing-video-frames-with-markers#answer_90206

template matching could work.. you compare the template in your reference image with your other frames, you can check 'normxcorr2' and http://www.mathworks.com.au/matlabcentral/answers/28279