This week, we used 3D tracking to make some changes to a scene in a video. I added flower textures on some walls, and changed the blue doors to be a green one. In this process, I found that not all tracking points could perfectly match the camera’s movement, so we needed to find the right tracking points to add materials.
The main content of this semester is how to use 3D tracking in nuke, which is a very important feature in nuke. We can create three dimensions for a scene in a flat image to track any area of the scene. 3D tracking can track cubes as well as planes. This function can create many tracking points and describe the structure of objects in the picture with tracking points. Through these points in the space, we can achieve a virtual camera with the same motion and other attributes. If we import the points in these Spaces and the calculated camera into the 3D software, we can create 3D objects, and the camera can be used for rendering. The rendered objects will be correctly matched in the original picture.