At this time, there is no way to safely dump floating-point image formats without converting them to a lesser format and truncating valuable information.
http://www.graphics.cornell.edu/online/formats/rgbe/
That link has some code that can easily be adapted to the Ogre pixel formats with very little change.
RGBE File Support
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spacegaier
- OGRE Team Member
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Re: RGBE File Support
If you are in actual need of that feature, you might want to try to add it yourself and then submit a patch. Otherwise you will have to wait for someone to pick it up. I would also advice you to create a ticket on our tracker for that.
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