How do I stop iPhoto compressing my JPEG files?

I have been trying to rotate photos using iPhoto. When I then export them back to the same place on the hard disk, they are compressed to less than half the original file size, even though I have specified full size, and maximum file size. How can I prevent this? I don't want to lose quality.

The best way is to use the Contextual menu application PhotoTool CM to losslessly rotate the photos before importing into iPhoto. Or use Xee, a free image editor with lossless rotation capability.
If your camera has the auto rotate feature turn it off and then follow the suggestion above before importing. That will rid iPhoto of the modified version rotated to the correct orientation.
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto (iPhoto.Library for iPhoto 5 and earlier) database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.
I've created an Automator workflow application (requires Tiger or later), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. It's compatible with iPhoto 6 and 7 libraries and Tiger and Leopard. Just put the application in the Dock and click on it whenever you want to backup the dB file. iPhoto does not have to be closed to run the application, just idle. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.
Note: There's now an Automator backup application for iPhoto 5 that will work with Tiger or Leopard.
Message was edited by: Old Toad

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Yes, Lightroom V1.0 is DEFINATLY writing data to JPEG files.
I would VERY STRONGLY prefer sidecar files, as I do not want to ever modify the "as shot" files.
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1) When storing files, I immediately create a "modified" and "Original" image directory. (Yes, this effectively DOUBLES storage requirements).
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This seems to be working well for me. I have had to move some directories around, and have "reimported" the modified JPEGs into lightroom: Lightroom correctly (I think) maintained all the edits from my original pass at the files. I have not checked if the histories are lost. . .but that is not a big deal, as I only care about the end result.
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How do I stop mail compressing my photos?

How do I stop mail compressing my photos? I have set 'Actual Size' in Mail and still the photos are compressed to thumbnail size.
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The best way is to use the Contextual menu application PhotoTool CM to losslessly rotate the photos before importing into iPhoto. Or use Xee, a free image editor with lossless rotation capability.
If your camera has the auto rotate feature turn it off and then follow the suggestion above before importing. That will rid iPhoto of the modified version rotated to the correct orientation.
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto (iPhoto.Library for iPhoto 5 and earlier) database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.
I've created an Automator workflow application (requires Tiger or later), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. It's compatible with iPhoto 6 and 7 libraries and Tiger and Leopard. Just put the application in the Dock and click on it whenever you want to backup the dB file. iPhoto does not have to be closed to run the application, just idle. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.
Note: There's now an Automator backup application for iPhoto 5 that will work with Tiger or Leopard.
Message was edited by: Old Toad

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How do I stop iPhoto compressing my JPEG files?

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