On 08/18/2012 02:08 PM, Tim Dickson wrote:
I am trying to load single pages from multipage tiffs, convert them to monochrome (dithered), flatten the image, then save them as single monochrome, ccitt group4 tiffs. - all through scripts.

The multipage tiffs contain pages in grayscale and colour which were created using the old style (problematic) jpeg compression option.

I have tried other tools, such as libtiff (modified with a patch to handle the old jpeg compression), and the latest version of imagemajick. Unfortunately they cannot correctly convert the files, whereas gimp can, but only one page of the multi-page tiff at a time (gimp crashes if I load a 5page document (as separate images) then convert each image to monochrome,flatten and save in one session)
Are you using a developmental version (2.9 --)? If not, the crash itself warrants a bug report.

the scripting function for loading tiffs
file-tiff-load
does not expose the options to load individual pages, or to select loading as images or as layers, which the visual file load/import does.

does anyone have any suggestions as to how I can achieve this using a script.?
manually is not a problem, but too time consuming for large (eg. 200page) tiffs.
thanks, tim
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