2006.11.01 15:47 "[Tiff] splitting G4 image without decompression", by Marvin Fresno

2006.11.01 16:02 "RE: [Tiff] splitting G4 image without decompression", by

Marvin wrote:

Is it possible to split a G4 image into several G4 subimages without decompressing?

Probably not. The vertical (2D) compression scheme relies on a previous line (an imaginary white line in the case of the first), so even if you could break the compressed data block into sub-blocks at line boundaries (already difficult/impossible), only the first sub-block would be able to use the imaginary white line above the image; the rest of the sub-blocks would be depending on the last line of the previous sub-block, which wouldn't be handled well by the standard decompression algorithm.