2008.01.21 19:38 "[Tiff] How to clip an image with LibTiff", by

2008.01.24 12:14 "Re: [Tiff] Change single pixels in a tiled Tiff-image", by Andrey Kiselev

On Wed, Jan 23, 2008 at 09:18:06PM +0100, Timur Ametov wrote:

I have another question. Can (or how can) I change single pixels in a tiled TIFF-Image.

I have only one idea how can I do this:

  1. read a tile, where the pixel is, into buffer
  2. change the pixel
  3. rewrite tile

but maybe there are another solutions?

In case of uncompressed tile you can try to overwrite the pixel yourself using TileOffsets table to get the data disk layout. But do not forget that the tile can be compressed and you need to decompress it to get access to individual pixels.

Best regards,


Andrey V. Kiselev
ICQ# 26871517