jmann wrote:I'm not sure what the q-factor is.
- Code: Select all
-q value : JPEG/FPX/WIC/PDF quality (default : 85)
-subsampling value : Subsampling factor
0 : 2x2,1x1,1x1
1 : 2x1,1x1,1x1
2 : 1x1,1x1,1x1
jmann wrote:For the quality setting though ... what is the real difference from -q 85 as default at 2 MB to -q 96 at 6 MB.
jmann wrote:If related to an option in Photoshop when editing an image ... what would be related?
ImpulseAdventure (JPEG Chroma Subsampling » Photoshop Quality and subsampling) wrote:
As an aside, note that Photoshop CS2 uses different chroma subsampling levels depending on the Save JPEG Quality settings:
- Photoshop Save As Quality 0-6 - 2x2 Chroma Subsampling
- Photoshop Save As Quality 7-12 - 1x1 No Chroma Subsampling
- Photoshop Save For Web Quality 0-50 - 2x2 Chroma Subsampling
- Photoshop Save For Web Quality 51-100 - 1x1 No Chroma Subsampling
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