how to edit tiffs without zuking up the alpha

2000-06-16 Thread Dave Morse
Hi, I've got tiffs created in Photoshop that I need to crop using Gimp. They have alpha. If I open the up in Gimp, use the crop tool, then resave, the next time I open them I discover that only the alpha-mask has been saved in place of the rgb data. before save:

Re: how to edit tiffs without zuking up the alpha

2000-06-16 Thread Jonathan E. Paton
I tried downloading the two files to play with them. The second file 'after.tiff' is fine, but opening 'before.tiff' using the gimp gives errors - about unknown data segments. This is probably because Photoshop is using a newer(or non-standard) file format than the GIMP. The file itself was

Re: how to edit tiffs without zuking up the alpha

2000-06-16 Thread Jonathan E. Paton
Your aim was to use the GIMP to crop the pictures, but did you try anything else? I tried some color related operations (color compose) and it returned "Compose: Image is not a gray image (bbp=3)". The bbp bit means bits per pixel (I think), and don't know if this has any real bearing on