How fast is it？Is there any paper about the algorithm of this tool?

njzhangyifei / keyframe

keyframe: a simple tool for selecting keyframes from SfM (structure from motion) videos

MIT License

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How fast is it？Is there any paper about the algorithm of this tool? #2

Open linmqing opened 6 years ago

linmqing commented 6 years ago

Hi, Yifei Zhang

I read the documentation, and noticed you said "Fast but may be inaccurate as no geometrical estimation of the scene is done in the process". I wonder how fast this tool to select key frames?

If I want to learn more about the selection algorithm of this tool, is there any reference paper I can read?

Thanks for your help.

Manqing Lin

njzhangyifei commented 6 years ago

It’s just optical flow. I integrated the average movement vector of feature points throughout frames. The result vector is an approximate measure of how far camera has moved.

This tool helps eliminate some redundant frames from your video and makes your reconstruction run faster. (Say you have a 60fps video and you don’t really want run photoscan on all frames)