JPEG Metadata Reference Information - home

Format of Photoshop IRB resource 0x0406 - JPEG Quality

Quality 2 bytes 0xFFFD = Quality 1 (Low)
0xFFFE = Quality 2 (Low)
0xFFFF = Quality 3 (Low)
0x0000 = Quality 4 (Low)
0x0001 = Quality 5 (Medium)
0x0002 = Quality 6 (Medium)
0x0003 = Quality 7 (Medium)
0x0004 = Quality 8 (High)
0x0005 = Quality 9 (High)
0x0006 = Quality 10 (Maximum)
0x0007 = Quality 11 (Maximum)
0x0008 = Quality 12 (Maximum)
Format 2 bytes 0x0000 = Standard Format
0x0001 = Optimised Format
0x0101 = Progressive Format
Progressive Scans 2 bytes 0x0001 = 3 Scans
0x0002 = 4 Scans
0x0003 = 5 Scans
- 1 byte Always seems to be 0x01


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