Using JPEGSnoop 1.8.0 it is possible to examine files saved using IJG library compiled with JSAMPLE size of 12 bits.
Images compressed with Huffman coding can be shown, even though JPEGSnoop incorrectly defaults View -> Image Chan to RGB instead of Y. Sadly, the image display is corrupted -- it seems it is being decoded incorrectly.
However, 12-bit grayscale images compressed with arithmetic coding (which is now the default in IJG JPEG library v9) cannot be displayed at all.
I am attaching sample Huffman and arithmetic coded 12-bit gray JPEG images so you can take a look.
Finally, for the 001_huff image which displays as corrupted in JPEGSnoop, here is how it should look like when decoded correctly:
@ImpulseAdventure
Using
JPEGSnoop 1.8.0it is possible to examine files saved using IJG library compiled with JSAMPLE size of 12 bits.Images compressed with Huffman coding can be shown, even though JPEGSnoop incorrectly defaults
View -> Image ChantoRGBinstead ofY. Sadly, the image display is corrupted -- it seems it is being decoded incorrectly.However, 12-bit grayscale images compressed with arithmetic coding (which is now the default in IJG JPEG library v9) cannot be displayed at all.
I am attaching sample Huffman and arithmetic coded 12-bit gray JPEG images so you can take a look.
Finally, for the
001_huffimage which displays as corrupted in JPEGSnoop, here is how it should look like when decoded correctly: