[Image-SIG] Re: Problems with TIFFs from Corel Draw?

[Fredrik Lundh]

kevin at cazabon.com wrote:

> Has anyone had problems opening TIFF images from Corel Draw (version 10 at
> least, if not others) using PIL?  A user of one of my programs is having
> issues, and the test image results in the following error when you try to
> Image.open(file):
>
> IOError:  cannot identify image file
>
> The magic number looks ok, Photoshop opens it ok, but PIL doesn't like it.
>
> I've posted a copy of the sample file that has problems at:
> http://www.cazabon.com/images/testCorel.tif

the file is said to have 999 extra layers, which is a bit more than PIL
can handle...

running with Image.DEBUG = 1 results in this output:

tag: NewSubfileType (254) - type: long (4) - value: (0,)
tag: ImageWidth (256) - type: long (4) - value: (100,)
tag: ImageLength (257) - type: long (4) - value: (100,)
tag: BitsPerSample (258) - type: short (3) - value: (8, 8, 8, 8)
tag: Compression (259) - type: short (3) - value: (1,)
tag: PhotometricInterpretation (262) - type: short (3) - value: (2,)
tag: ImageDescription (270) - type: ascii (2) - value:
tag: StripOffsets (273) - type: long (4) - value: (32, 8032, 16032, 24032, 32032)
tag: Orientation (274) - type: short (3) - value: (1,)
tag: SamplesPerPixel (277) - type: short (3) - value: (4,)
tag: RowsPerStrip (278) - type: long (4) - value: (20,)
tag: StripByteCounts (279) - type: long (4) - value: (8000, 8000, 8000, 8000, 8000)
tag: XResolution (282) - type: rational (5) - value: ((10629921, 100000),)
tag: YResolution (283) - type: rational (5) - value: ((10629921, 100000),)
tag: ResolutionUnit (296) - type: short (3) - value: (3,)
tag: ExtraSamples (338) - type: short (3) - value: (999,)
tag: unknown (34016) - type: ascii (2) - value:
tag: unknown (34017) - type: ascii (2) - value:
tag: unknown (34018) - type: ascii (2) - value:
tag: unknown (34019) - type: short (3) - value: (0,)
tag: unknown (34020) - type: short (3) - value: (8,)
tag: unknown (34021) - type: short (3) - value: (16,)
tag: unknown (34022) - type: byte (1) - value: ()
tag: unknown (34023) - type: byte (1) - value: (0,)
tag: unknown (34024) - type: byte (1) - value: (0,)
tag: unknown (34025) - type: byte (1) - value: ()
tag: unknown (34026) - type: byte (1) - value: ()
tag: unknown (34027) - type: byte (1) - value: (0, 0)
tag: unknown (34028) - type: byte (1) - value: (0,)
tag: unknown (34029) - type: ascii (2) - value:
tag: unknown (34030) - type: long (4) - value: (0,)
*** Summary ***
- compression: raw
- photometric_interpretation: 2
- planar_configuration: 1
- fill_order: 1
- size: (100, 100)
format key: (2, 1, 1, (8, 8, 8, 8), (999,))
- unsupported format

I'll look at this when I find the time (but don't let that stop you from
digging into the code).

</F>