|AWARE [SYSTEMS]||Imaging expertise for the Delphi developer|
|TIFF and LibTiff Mailing List Archive|
LibTiff Mailing List
2006.11.01 16:02 "Re: splitting G4 image without decompression", by Bernie Pallek
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.