Saving a TIF with Group4 Compression

Hi,

I'm currently trying to save a wx.Bitmap as a
Group4 compressed Tif. The attached script should work as far as I can see. All it does do is create a 0 byte file. I have had a few other effects where the file size is bigger but the contents aren't a correct tif.
I also tried using PIL which works fine but I can't get compression
to work.

I would be grateful for any input.

Adi

save-tif-error.py (1.11 KB)

Robin seems to be working on the problem:

http://lists.wxwidgets.org/cgi-bin/ezmlm-cgi?11:mss:39564:200505:pedejhdakcfkekmnofkn

I'm not sure that these links help much:

http://mail.python.org/pipermail/image-sig/1997-May/000271.html

and

It looks a bit old, maybe something has changed.
Did you ask on the PIL mailing list?

Harald Stürzebecher

···

2005/6/15, Adi Jörg Sieker <ml@adsworth.info>:

Hi,

I'm currently trying to save a wx.Bitmap as a
Group4 compressed Tif. The attached script should work as far as I can
see. All it does do is create a 0 byte file. I have had a few other
effects where the file size is bigger but the contents aren't a correct tif.
I also tried using PIL which works fine but I can't get compression
to work.

I would be grateful for any input.

Hi Harald,

Harald Stürzebecher wrote:

Hi,

I'm currently trying to save a wx.Bitmap as a
Group4 compressed Tif. The attached script should work as far as I can
see. All it does do is create a 0 byte file. I have had a few other
effects where the file size is bigger but the contents aren't a correct tif.
I also tried using PIL which works fine but I can't get compression
to work.

I would be grateful for any input.

Robin seems to be working on the problem:

http://lists.wxwidgets.org/cgi-bin/ezmlm-cgi?11:mss:39564:200505:pedejhdakcfkekmnofkn

Looks like he is working on something todo with saving Tiff with no compression. I hope it'll also fix my problem.

I'm not sure that these links help much:

[PYTHON IMAGE-SIG] Re: [PIL] How to write compressed TIFF images

and

ActiveState Community - Boosting coder and team productivity with ready-to-use open source languages and tools.

It looks a bit old, maybe something has changed.
Did you ask on the PIL mailing list?

No, I haven't will do that aswell though.

Thanks for the suggestions

Adi

···

2005/6/15, Adi Jörg Sieker <ml@adsworth.info>: