 BetterPhoto Member |
How does editing a picture too much wreck the f I have read that editing your photo too much can "wreck" the file. Can you explain that further, and if it is saved in a TIFF format can you edit that without this worry? Should all photos be saved in TIFF on computer and backup CD's?
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doug Nelson |
Actually, all edits in any format can deteriorate image quality. In TIF we would not see it at all, unless we REALLY blow it. In Photoshop you know you've blown it when the histogram looks like a hillbilly's snaggle teeth. Those gaps mean there's no image information for that level of brightness shown as a gap. This happens with too many changes in Levels and/or Curves. I had this happen when I was learning. I would save in TIF or in PSD when I want to preserve layers. You can do Levels, Curves, Color balance and other functions on Adjustment Layers, thus retaining the option of throwing the layers away and starting over, or adjusting the degree of change by tweaking only that layer. People swear by JPEG, saying that they do edits with no image deterioration. They may get away with it on some images.
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Jon Close |
TIFF saves all information, but as Doug pointed out there are edits/changes that can be made that cannot be reversed once saved. A different problem arises when saving as JPEG. This format does a data compression with information and detail lost with each SAVE command. So even if you make no edits at all, the image can deteriorate with each SAVE (nothing is lost if you simply CLOSE the file).
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