This week Mr. Gonzalo gave us three ways to remove tracking points. Overall the methods of removing tracking points all involve creating new patches that have been cleared and then overwritten onto the original video.

The first method is to use RotoPaint for erasing. This approach is suitable for videos that are relatively short and have fewer dots. This method is similar to the imitation stamp in PS. Select a piece that has no tracking points. Then overlay the area with tracking points.

The second method is PREMULT & UNPREMULT FOR PAINT, which overwrites the original video by making one small patch after another. This method is suitable for good tracking as well as more obvious tracking points. I think this method is better to use.

The third method is Markers removal – advanced – CLONE AND VECTORS. this method analyzes the pixel information around the tracking point. The raw data of the vector is then transferred to other nodes for use through the VectorDistort node. Although this method can track and eliminate the pixel points quickly. But I found that when I used this method for my homework. Some of the video dots can be eliminated. Some dots are not cleared in the second half of the video. And the video has distortion in the second half. I think this may be due to the fact that the face movement in the video is relatively large, resulting in a calculation error.

Home work

I tried three approaches for this assignment. But for the first method this video is too long. For the third method, the shape of the video was distorted. Finally I used the second method to make it. This video is still hard to track no matter how I change the contrast or color. So the tracking is basically frame by frame. But the final overall result is still very good.