Legacy ImageMagick Discussions Archive

Hi, I have a series of large images (14000x14000+) which I need to resize and convert to 256 colours, however when converting these using -resize <width>x<height> -dither None -colors 256 I find that the colours don't quite match at the tile borders. I would like to generate a colormap across all th...

This is a strange one. I experienced the problem with the latest dynamic Q16 version but I replaced it with the Q16 static standalone version and they resize just as quickly the other tools. Seems there may be something different about the way the 2 handle large files?

Hi, I'm using ImageMagick to convert some large TIFs (14000x14000) to smaller sizes - 8000x8000, 4000x4000 and 2000x2000, in GIMP and Photoshop this takes seconds but ImageMagick takes hours. My command line is: convert "<path>\<to>\<input>" -resize 2000x2000 "<path>\<to>\<output>&quo...

Thanks, I did try it that way round but it didn't make any difference to the output unfortunately.

Hi, I'm working on replacing a GIMP-based script with ImageMagick and I'm having some problems with image conversion. The process is required to take an input TIF image and convert to a PCX image tile. The tile appears to export OK but does not look correct when loaded by the application it's being ...

Thanks, I've been reading through that and adjusting memory limits etc but it still takes a very long time (10 mins+) to open the file whereas something like GIMP can open it and start processing in < 10 secs. Not sure if this is expected or if I'm doing something wrong.

I have a file which is around 100000 x 100000 pixels, I would like to crop into smaller images which I'm doing with: convert input.jpg -crop 100x100 +repage output_%d.jpg This is working but it takes a very long time and a huge amount of memory to open the file. Is there a way to do this without ope...