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wrong compression type reported for TIFF's #309

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PlugOne opened this issue Oct 18, 2016 · 1 comment
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wrong compression type reported for TIFF's #309

PlugOne opened this issue Oct 18, 2016 · 1 comment
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@PlugOne
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@PlugOne PlugOne commented Oct 18, 2016

Hi.

I'm using Wand (Mac 10.11.6. Wand(0.4.3), imagemagick(6.9.6-2) and dependencies installed through brew, pyenv running 3.5.2) to, among other things, verify the properties (colorspace, depth, compression, etc. ) of a huge batch of TIFF's. Wand is reporting that the compression type of some of the TIFF's is 'b44a,' which is far as I know is not supported by the TIFF format. Looking at the images using Imagemagick's identify (identify -format "%C" [path\to\tiff]) shows them as 'None' or uncompressed. EXIFTool as well as a hex dump of the files confirm that they are uncompressed. Testing it out a little, a TIFF using JPEG compression reports as 'JPEG2000' while a Group 4 encoded bitonal image reports as 'fax.'

Thanks for your help. And thanks for Wand.

@emcconville
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@emcconville emcconville commented Dec 13, 2018

Ah! Looks like COMPRESSION_TYPES was mapped to ImageMagick-7's CompressionType enumerators. Should be a simple fix.

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