#10: How can I tell if a PNG has transparency?
Solved!on February 06, 2009, 12:22 AM UTC — from 
kevin ( 1,977 views )
kevin ( 1,977 views )
I have a PNG, and I want to know if the background (or any regions) are transparent.
Use the command-line tools from ImageMagick
- ivan on April 15, 2009, 06:18 PM UTC
If you have the ImageMagick package installed (available for UNIX/MacOSX/Windows), the 'identify' command-line tool can dump information on a given file if it's of a format supported by ImageMagick.
To dump transparency information about a file use the following command:
"identify -format %A <filename>"
This will return a simple "True" or "False" depending on whether the image has a transparency layer or not.
To dump transparency information about a file use the following command:
"identify -format %A <filename>"
This will return a simple "True" or "False" depending on whether the image has a transparency layer or not.
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More image properties
http://www.imagemagick.org/script/escape.php - found by ivan on April 15, 2009, 06:20 PM UTC
List of properties that 'identify' can dump from an image.
ImageMagick's 'identify' command
http://www.imagemagick.org/Usage/basics/#identify - found by ivan on April 15, 2009, 06:19 PM UTC
ImageMagick's 'identify' command-line basics.