In trying to convert some jp2 files to jpg, I've discovered that no matter what I do (animate, display, convert format or scale, etc) my images have dark areas where bright areas used to be. In other words, if I view these files (jp2) in Preview, they look great, but if I view them or modify them with ImageMagick, the brightest pixels wrap around and become dark.
Any thoughts what might be going on here? I'm not very knowledgeable in the subject, so any pointers would be appreciated.
wrapping in jpeg2000 images
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anthony
- Posts: 8883
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Re: wrapping in jpeg2000 images
Are you processing the image in some way. Can you give a url to a SMALL example image, the command, and the resulting image? Also IM version number, and the JPEG2000 library version number. This should be supplied to the 'bugs' forum.
IM should not be doing what you describe, and if it is doing this (which sounds like a -solarize type effect) then it needs to be fixed ASAP.
IM should not be doing what you describe, and if it is doing this (which sounds like a -solarize type effect) then it needs to be fixed ASAP.
Anthony Thyssen -- Webmaster for ImageMagick Example Pages
https://imagemagick.org/Usage/
https://imagemagick.org/Usage/
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Naasty
Re: wrapping in jpeg2000 images
I'm not processing the image. Just using display to view it.
Version: ImageMagick 6.4.1 06/03/08 Q1
Not sure what the jpeg2000 library version is. How do I get that?
OS is OS X 10.5.4
Here's a link to the image. Password to view is jpeg2000
http://www.4shared.com/dir/8468217/7a6c8b31/shared.html
Version: ImageMagick 6.4.1 06/03/08 Q1
Not sure what the jpeg2000 library version is. How do I get that?
OS is OS X 10.5.4
Here's a link to the image. Password to view is jpeg2000
http://www.4shared.com/dir/8468217/7a6c8b31/shared.html