> As you said I tried by setting quality for info object before write to file.
> But when I open that new image in photo shop it allways shows saved as 12.
> But I want to save the file as 10. I tried with different values for quality
> between 1 to 100.
>
I think Eric is right that jpeg compression rate is between 1-99(IJG) and
can be set via ImageInfo interface in JMagick. You may try different
quality values, compare different outputed images and will see the
difference. Another way is using convert and identify commands to compare
images with different quality values, as suggested by Bob.
Photoshop seems use totally different way for quality measurement. The
following link give some valuable information about jpeg compression.
http://www.photo.net/learn/jpeg/Jin
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