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Discussion in 'Digital Photography' started by lamina, Sep 8, 2006.
When importing images with iPhoto, does it compress them?
Nope, it leaves all your originals untouched. When you make any adjustments, it makes a copy and then performs the adjustments on the copy.
Yeah, and that edited copy is like twice compressed. Well, it's uncompressed, edited on, and then compressed again........erm, or something like that. Either way it's not good. Don't go back and make small edits too many times.
iPhoto uses some sort of black magic to compress the originals into the thumbnails. However the originals remain untouched when they are imported from your camera.
Yes and no.
All JPG files are compressed. iPhoto writes JPG files so therefore it writes compressed files. But iPhoto does nothing different then other programs that write JPG files. iPhoto can also work with formats that are not compressed. It can read RAW format images and write TIFF files.