JPEG file save and the rate of loss in PSE

When working with jpeg files in the editor of PES, PES runs an automatic internal file 'Save' after each adjustment, (levels, color, etc.)?  I always thought that the file will not be saved until the user makes a manual backup once the editing is complete.

If automatic 'saved' internal is performed after each adjustment on a jpeg file. then the image degradation may be accelerated beyond what we could expect, that is, each saving a jpeg file reduces the quality of the image.  If these automatic judgments are made, so I assume that is the only way to edit files in psd format, then save the final psd file to a jpeg format to save disk space.

Bob Ward wrote:

When working with jpeg files in the editor of PES, PES runs an automatic internal file 'Save' after each adjustment, (levels, color, etc.)?  I always thought that the file will not be saved until the user makes a manual backup once the editing is complete.

Yes.

If automatic 'saved' internal is performed after each adjustment on a jpeg file. then the image degradation may be accelerated beyond what we could expect, that is, each saving a jpeg file reduces the quality of the image.  If these automatic judgments are made, so I assume that is the only way to edit files in psd format, then save the final psd file to a jpeg format to save disk space.

No, the format "in memory" is not saved on the disc, unless you manually choose to "save under".

If you periodically save a jpeg version (by overwriting the older), without closing the file, changes to jpeg compression are not cumulative. The version "in memory" is kept. It's not as if you save it in jpeg format, close and reopen, in which case compression double jpeg would have occurred.

If you want periodic stops in a long of an image editing session, it is best to save as psd, because saving layers, selections... It is also best if you work in 16-bit. If you save as a jpeg, the jpeg compression will be done only once, there will be no cumulative loss of quality.

Tags: Photoshop

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