Daniel Meier Posted April 20, 2017 Share Posted April 20, 2017 Sometimes I get these weird noisy artefacts when trieng to qualify a certain color: Do you know if that is due to the footage (this example show a Canon DSLR h.264 8Bit 4:2:0 Clip)? Or is it the mediocre qualification (maybe I should refine my matte with "clean black", "clean white", etc.)? Link to comment Share on other sites More sharing options...
Matt Thomas Posted April 20, 2017 Share Posted April 20, 2017 I believe it's just because you are trying to stretch the 8bit information too thin and results in some funky artifacts. Sometimes I've gotten lucky by tweaking the matte a million different ways, but mostly I avoid using that qualifier with 8bit footage. Link to comment Share on other sites More sharing options...
Premium Member Tyler Purcell Posted April 20, 2017 Premium Member Share Posted April 20, 2017 Yea, it's lack of data. You're selecting a color to qualify, but there isn't enough differentiation between it and another color (luminance) within the scene. It may not be a bit depth issue, it maybe only coincidence. I see this all the time when two colors are so closely matched. To fix this, I generally start by softening the qualifier and adjusting the white/blacks of it. If that doesn't work, you need to make a power window matte around the door frame that travels with it and then isolate the color within that matte, vs the rest of the shot. Link to comment Share on other sites More sharing options...
Daniel Meier Posted April 20, 2017 Author Share Posted April 20, 2017 Thanks Tyler and Matt. Link to comment Share on other sites More sharing options...
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