I was reading on the wikipedia page for Chroma Subsampling that you could have some out of gamut color issues: https://en.wikipedia.org/wiki/Chroma_subsampling.
How big of a problem is this?
jsc723
I'm wondering why the right bottom one is called 4:2:0 representation instead of 4:1:1
emilyzhong
Given that 4:2:2 representation always stores Cb and Cr at half resolution in the same direction, if one continues to save as JPEG, will any artifacts related to this occur?
youtuyy
For the question above, it is 4:2:0 instead of 4:1:1 because the three numbers J:a:b refer to the following(according to wikipedia):
J: horizontal sampling reference (width of the conceptual region). Usually, 4.
a: number of chrominance samples (Cr, Cb) in the first row of J pixels.
b: number of changes of chrominance samples (Cr, Cb) between first and second row of J pixels.
I was reading on the wikipedia page for Chroma Subsampling that you could have some out of gamut color issues: https://en.wikipedia.org/wiki/Chroma_subsampling.
How big of a problem is this?
I'm wondering why the right bottom one is called 4:2:0 representation instead of 4:1:1
Given that 4:2:2 representation always stores Cb and Cr at half resolution in the same direction, if one continues to save as JPEG, will any artifacts related to this occur?
For the question above, it is 4:2:0 instead of 4:1:1 because the three numbers J:a:b refer to the following(according to wikipedia): J: horizontal sampling reference (width of the conceptual region). Usually, 4. a: number of chrominance samples (Cr, Cb) in the first row of J pixels. b: number of changes of chrominance samples (Cr, Cb) between first and second row of J pixels.