This week we learned about nuke tracing, nuke is not a very good software for me to understand, I need to spend more time working on the use of nodes and what the different nodes do.
First we mask the face of the character, in this node of roto, you can draw the mask curve of the face of the character, and do a good job of grouping, in the list of Roto Paint properties panel for good grouping, in this node of Roto Paint, also contains a lot of pairs of shapes, you can use any of the tools to draw, adding convenience, by Adjusting the video progress bar, we masked the entire head and neck of the video.
Then we tracked the familiarity of the video, first we have to create the roto node, the stone column into from the box, and add tracker node, track the stone column, add tracking points, start tracking, if the tracking path shows normal and complete tracking, under the CameraTracking panel. under the Analysis option, click Solve to solve. The green point is the correct point, the red point is the wrong tracking point, then do the final operation in the Transform of tracker and roto to connect the translate and center values. Running the video at this point reveals that the tracking was successful, and then I tracked each of the remaining columns and iron pipes on the bridge.