This week’s main content is about green screen compositing
We started by learning about a new colour format, HSV, which is different from RGB, and how to use hsv to process image information.
We learned about the nodes of the key and how they operate. And tried a few different methods for toning and key.
Afterwards we tried the complete process for practice.
Lumminance channels：
I think it is essentially a partitioning of the image into blocks by different colour channels.
The main nodes used are keyer and colourspace.
We can use them for simple masking and colour manipulation
For green screen:
This lesson is a brief introduction to the nodes that have been used. They are IBK, chromKeyer, keylight, Primatte, Ultimatte.
They have their own characteristics and in general I think that keylight is the most widely used node.
There were a lot of new theories and points of knowledge in this class, which at the time I thought they were simply colour mixing. But now after re-reading the class documents I have a better understanding of these nodes