Quick Photo Re-Sizing Question

slackula

I took a bunch of photos the other day with my digital camera. Many are vertical in orientation. For some reason, the auto-rotate feature in my camera did not work this time.



So I pulled them up in Preview in the Finder. I noticed that with the ones that I rotate to vertical in Preview, the photos seem to shrink. For instance, prior to opening one, I clicked on the Apple and the "i" buttons and the "Info" window notes that the image is 2.5MB on disk. After opening in Preview, I selected the simple ""Rotate Right" once from the "View" pull-down menu. I clicked on the "Save Changes" botton when closing the photo. Now when I click on the Apple and "i" buttons, the "Info" window indicates the image is 1.1 MB on disk.



I checked all the Preferences in Preview and de-selected all of the auto-resizing boxes but still seem to have the "shrinking photo problem."



What am I missing?



Thanks for all your help!!

ghost_user_name

The problem is that Preview sort of hides the JPEG compression settings. I assume you're using JPEG. Use "Export" instead of "Save As" and then be sure to click the Options button.



Important note: Preview does *not* do a lossless rotation on JPEG images. Each save or export will result in degeneration of quality and lost data. GraphicConverter can do lossless rotation.

slackula

Thanks, Brad!! You rock!!

sledgehammer

I've never really taken the time to investigate the issue, or even to care too much about it, but it seems like whenever I re-save JPEGs in GC, they get bigger. Any idea why?