This week we have learned a few important nodes, IBK COLOR, IBK GIZMO, KEYLIGHT, PRIMATTE, ADDMIX, LIGHTWRAP, which play a very important role in clearing the green screen.
The chromKeyer tends to work better with more evenly lit
screens that are more of a saturated color.
NUKE’s CHROMA KEYER is that it takes full advantage of any
GPU device you have in your system.
IBK stands for Image Based Keyer
It operate with a subtractive or difference
methodology.
It is one of the best keyers in NUKE for getting detail out
of fine hair and severely motion blurred edges
First I did a noise reduction on the green screen scene, then I used keylight and selected the background green to erase the background, held shift, absorbed the colour and processed it, I turned on the Alpha channel to check that the white and black areas were clean and completely separated, then I made some changes to the Screen matte values.
Next I colour corrected the background video, to make the background colour look clearer I reduced the saturation value to zero, the other channels I fine-tuned to fit more closely with the foreground, after which I merged the two nodes together. After the Roto, I added a blur node to blur the edges. Then I set keyframes where the microphone appears and merged them together. And then, I tracked the background video and the foreground character so that the background was following the camera movement. I created a tracker node to make it follow the background. The tracking was done. Finally, the colour grading was done to make the video visually more colour fitting