Legacy ImageMagick Discussions Archive

After an update to the version of image magick, I've come across an issue where PSD with transparency are incorrectly detected as having none, leading notably to a loss of any transparency when converting to another format supporting it such as PNG

Code: Select all

$ convert -version
Version: ImageMagick 6.8.9-0 Q8 x86_64 2014-04-30 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2014 ImageMagick Studio LLC
Features: DPC Modules OpenMP
$ convert test.psd[0] -format "width=%w height=%h transparent=%A colorspace=%[colorspace]" info:
width=1128 height=994 transparent=False colorspace=sRGB
$ identify -verbose test.psd[0]
Transparent color: black

Older version of image magick used to detect and handle it properly

Code: Select all

$ convert -version
Version: ImageMagick 6.7.7-10 2014-03-06 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2012 ImageMagick Studio LLC
Features: OpenMP
$ convert test.psd[0] -format "width=%w height=%h transparent=%A colorspace=%[colorspace]" info:
width=1128 height=994 transparent=True colorspace=sRGB
$ identify -verbose test.psd[0]
Transparent color: none

Two sample PSD exhibiting the issue (the image displayed is a PNG, to get the PSD please click "Download" at the top right):
http://sta.sh/01u41zwkjp8e
http://sta.sh/065xxj5jjnp

(additionally you can see the issue in question in those preview png, with the background as black instead of transparent)

Is this is a known issue, or is there any workaround ?

I have made some fixes to the PSD read last year but it seems I also broke something during my refactoring. I will submit a patch to our SVN repository later today and it should be available in ImageMagick 6.8.9-2 Beta by sometime tomorrow.

Thanks, the issue is fixed in latest source from beta

Hi there, and big thanks as always to the developers and community. I'm writing to check on the overall support of transparency in PSD/PSB/Adobe TIFFs.

Last I knew, IM did not support recognition of background transparency in these file types and multiple alpha channels were also not handled properly. Is this still the case? I see this thread and expect perhaps there has been some movement in this regard that I wasn't aware of.

Thank you for your time!
J

IM has only one alpha channel. If an input has more than one, others will be ignored.

I believe that IM now detects either background or alpha transparency. But I do not think it can handle multiple transparencies, yet.

IM 7 will support multiple transparecies, but I do not know if the PSD/TIFF reader can deal with it yet.

Legacy ImageMagick Discussions Archive

PSD transparency incorrectly detected and handled

PSD transparency incorrectly detected and handled

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