JPEG PoCs

images/jpg/README.md

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+# JPEG PoCs
+- `small.jpg` smallest valid JPG (no Application chunk)
+ - `small-invalid.jpg` same file w/o End of Image (invalid structure).
+- `20scans.jpg`: a JPEG made of 20 scans with JPEGTran to keep all scans under 64Kb (size = 847kb, 1944x2508px, q=100%) ([original PNG for reference](20scans_std.png)).
+ - scan definitions:
+  ```
+  0: 0-0, 0, 0;
+  0: 1-1, 0, 0;
+  0: 2-6, 0, 0;
+  0: 7-10, 0, 0;
+  0: 11-13, 0, 0;
+  0: 14-20, 0, 0;
+  0: 21-26, 0, 0;
+  0: 27-32, 0, 0;
+  0: 33-40, 0, 0;
+  0: 41-48, 0, 0;
+  0: 49-54, 0, 0;
+  0: 55-63, 0, 0;
+  # blue
+  1: 0-0, 0, 0;
+  1: 1-16, 0, 0;
+  1: 17-32, 0, 0;
+  1: 33-63, 0, 0;
+  # red
+  2: 0-0, 0, 0;
+  2: 1-16, 0, 0;
+  2: 17-32, 0, 0;
+  2: 33-63, 0, 0;
+  ```
+- `lossless.jpg`: a JPEG abused to store data losslessly (grayscale, 100%, with data padded and replicated 8 times).

images/jpg/jpg.sha256

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+6bc94128962177a0ab9017ba5cd90468969b58755bc19a1af9ec4f3370b77f32 *20scans.jpg
+07d95073f996441f694961d5916be21183a2e2deeb925eee2577655c523374bf *lossless.jpg
+0b8d8b5f15046343fd32f451df93acc2bdd9e6373be478b968e4cad6b6647351 *small.jpg
+b013a5e17c012d4f7fb66d56e7fabc31f0598f6a8b960387cbdace6351b231af *small-invalid.jpg
+b91e0c691e40f5bd2205d6330c5b9103f313ad3e6d31ec6e0dfe2dbc1a4734dd *20scans_std.png