Hi,
I have a tiff image which was saved with Photoshop with the settings listed below (I would attach it, but my internet connection now is so bad that it fails to send the mail if I do it!!). Pix_image silently fails to read it (or maybe it reads it as an all-white image, but i think it's the former, since pix_info returns -1 as width and height); however I can see it correctly in Image Viewer (the default image viewer in Ubuntu) and in GIMP. If I open it in GIMP and save it again into tiff, pix_image reads it correctly. However GIMP doesn't offer as many settings as Photoshop.
Does anybody know which of these settings is not supported by pix_image (if any)? (do you know any kind of "tiff inspector" for Ubuntu?)
Here are the settings:
Image compression: LZW Pixel Order: Interleaved (RGBRGB) Byte order: IBM PC Save Image Pyramid (checkbox): no Save Transparency (checkbox): no Layer Compression: RLE
I guess these are the default values in Photoshop (I don't have it, I was sent a screenshot of the settings they saved the image with).
Thanks m.
Maybe the compression is the problem?
On Mon, Mar 14, 2011 at 6:42 PM, Matteo Sisti Sette < matteosistisette@gmail.com> wrote:
Hi,
I have a tiff image which was saved with Photoshop with the settings listed below (I would attach it, but my internet connection now is so bad that it fails to send the mail if I do it!!). Pix_image silently fails to read it (or maybe it reads it as an all-white image, but i think it's the former, since pix_info returns -1 as width and height); however I can see it correctly in Image Viewer (the default image viewer in Ubuntu) and in GIMP. If I open it in GIMP and save it again into tiff, pix_image reads it correctly. However GIMP doesn't offer as many settings as Photoshop.
Does anybody know which of these settings is not supported by pix_image (if any)? (do you know any kind of "tiff inspector" for Ubuntu?)
Here are the settings:
Image compression: LZW Pixel Order: Interleaved (RGBRGB) Byte order: IBM PC Save Image Pyramid (checkbox): no Save Transparency (checkbox): no Layer Compression: RLE
I guess these are the default values in Photoshop (I don't have it, I was sent a screenshot of the settings they saved the image with).
Thanks m.
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On 03/15/2011 10:08 PM, chris clepper wrote:
Maybe the compression is the problem?
I don't think so. I also use LZW from Gimp (almost the only setting I can change in Gimp) and it gives no problem.
Unless of course Photoshop's way of compressing using LZW is different from Gimp's way, I don't even know if that is possible.
Have you remove all options when you save your TIFF in LZW with Photoshop ?(For info : I never use LZW compression when I save in TIFF) ++
Jack
Le mardi 15 mars 2011 à 23:08 +0100, Matteo Sisti Sette a écrit :
On 03/15/2011 10:08 PM, chris clepper wrote:
Maybe the compression is the problem?
I don't think so. I also use LZW from Gimp (almost the only setting I can change in Gimp) and it gives no problem.
Unless of course Photoshop's way of compressing using LZW is different from Gimp's way, I don't even know if that is possible.
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On 03/16/2011 01:17 AM, Jack wrote:
Have you remove all options when you save your TIFF in LZW with Photoshop ?
I can't remove options, I can only change their values. If you mean uncheck all checkboxes, the only two checkbox options are "Save Image Pyramid" and "Save Transparency" and they are already both disabled. I have also tried enabling Save Transparency with no luck; also tried enabling Save Image Pyramid also with no luck.
I have tried with no compression. Nothing changes (from Gimp both no compression and ZLW do work).
There are 192 possible combinations of settings, I can't possibly try all combinations. I've tried the most obvious things, such as discarding all layers, merging layers prior to saving, changing the byte order and the pixel order, but not all possible combinations of these.
Now I can attach one of the problematic images. Hopefully somebody may help me to identify what's wrong in it.
GIMP opens it without issues (though it loses the alpha channel for some reason), and when I save it again from GIMP, pix_images opens it.
However GIMP doesn't have as many options as Photoshop so I cannot know which are the settings in photoshops that corresponds to how GIMP saves the tiff.
thanks m.
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Charles Goyard -
chris clepper -
Jack -
Matteo Sisti Sette