Post any defects you find in the released or beta versions of the ImageMagick software here. Include the ImageMagick version, OS, and any command-line required to reproduce the problem. Got a patch for a bug? Post it here.
_DK_
Posts: 5 Joined: 2012-07-23T09:28:26-07:00Authentication code: 15
Post
by _DK_ 2012-07-26T04:25:07-07:00
Hi,
I have a tiff file in phososhop with 4 channels (RGBA), once it's converted all the channels are mixed and I can only see 3 channels (RGB and A is gone).
I tried different options and even the one that is supposed to force alpha still doesn't work:
ImageMagick-6.7.8-6\convert.exe test-alpha.tif -resize 512x512 -type TrueColorMatte -alpha On alpha-512.tif
ImageMagick-6.7.8-6\convert.exe test-alpha.tif -resize 128x128 alpha-128.tif
Here's the original and converted image:
http://narod.ru/disk/57731551001.6bb800 ... k.zip.html
Could you please give any hints? thanks!
I provided a bit more info here:
https://www.imagemagick.org/discourse-s ... 052#p88052
fmw42
Posts: 25562 Joined: 2007-07-02T17:14:51-07:00Authentication code: 1152Location: Sunnyvale, California, USA
Post
by fmw42 2012-07-26T09:56:42-07:00
Sorry, all I can say is that when I tried it on my Mac in IM 6.7.8.6 Q16, the alpha channel was in the output image as seen in PS CS. Sorry I only have that old version.
_DK_
Posts: 5 Joined: 2012-07-23T09:28:26-07:00Authentication code: 15
Post
by _DK_ 2012-07-27T02:53:10-07:00
Can you please try opening the attached image in your PS version. It would be great if you could tell me whether it shows an alpha channel in it on your computer and PS version.
fmw42
Posts: 25562 Joined: 2007-07-02T17:14:51-07:00Authentication code: 1152Location: Sunnyvale, California, USA
Post
by fmw42 2012-07-27T09:42:05-07:00
IM 6.7.8.6 Q16 Mac OSX Snow Leopardidentify -verbose test-alpha.tif Alpha: In PS CS I see an alpha channel. identify -verbose alpha-128.tif Alpha: In PS CS, I also see an alpha channel.
