[ wxwindows-Bugs-1593708 ] Incorrect TIFF image height using Group3 Fax compression

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Bugs item #1593708, was opened at 2006-11-09 15:35
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Category: wxImage
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: geskerr (geskerrett)
Assigned to: Nobody/Anonymous (nobody)
Summary: Incorrect TIFF image height using Group3 Fax compression

Initial Comment:
wxWidgets doesn't correctly display an image from a 
TIFF file with the correct dimensions if the 
image/file is using Group3 fax compression.

I found this explaination on the "graphicsmagick" 
website;
"""
Note that FAX machines use non-square pixels which 
are 1.5 times wider than they are tall but computer 
displays use square pixels so FAX images may appear 
to be narrow unless they are explicitly resized using 
a resize specification of "150x100%".
"""

In my wxpython program, if I rescale the image to 
twice the height reported by wxImage, then it is 
displayed correctly.

Note that TIFF files with Group4 compression are 
perform correctly.

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