https://bugzilla.wikimedia.org/show_bug.cgi?id=17645

--- Comment #9 from Nemo_bis <[email protected]> 2012-10-17 17:49:55 UTC 
---
Tim, which of the JPEG SOF tags identify a non-interlaced image (good for us)?
http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/JPEG.html#SOF

0x0 = Baseline DCT, Huffman coding
0x1 = Extended sequential DCT, Huffman coding
0x2 = Progressive DCT, Huffman coding
0x3 = Lossless, Huffman coding
0x5 = Sequential DCT, differential Huffman coding
0x6 = Progressive DCT, differential Huffman coding
0x7 = Lossless, Differential Huffman coding
0x9 = Extended sequential DCT, arithmetic coding
0xa = Progressive DCT, arithmetic coding
0xb = Lossless, arithmetic coding
0xd = Sequential DCT, differential arithmetic coding
0xe = Progressive DCT, differential arithmetic coding
0xf = Lossless, differential arithmetic coding

('exiftool -fast2' is a couple orders of magnitude faster than 'identify
-verbose'.)

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