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From "Ric Emery (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IMAGING-186) Add sCAL support to PNG reading and writing
Date Sat, 09 Jul 2016 00:49:11 GMT
Ric Emery created IMAGING-186:
---------------------------------

             Summary: Add sCAL support to PNG reading and writing
                 Key: IMAGING-186
                 URL: https://issues.apache.org/jira/browse/IMAGING-186
             Project: Commons Imaging
          Issue Type: Improvement
          Components: Format: PNG
            Reporter: Ric Emery
            Priority: Minor


It would be nice if the optional PNG - Physical Scale - sCAL chunk could be read and written.


http://www.libpng.org/pub/png/book/chapter11.html#png.ch11.div.9

For my use case, the pHYs chunk is not a good alternative. the pHYs x and y values are ints
which lose necessary precision.

I have a patch (with junits) ready for your review if you are interested.

Thanks



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