How to create jpeg files compatible with a sony
The jpeg files that GIMP creates are perfectly valid. I think
the basic problem is that you are trying to use a camera as a
storage device, which is not its intended purpose. There are
some cameras that, when you take a picture, create a digital
"watermark" that the camera can use to tell if the file has
been altered or corrupted. If the watermark does not match
the data -- which is bound to happen after editing in GIMP,
because GIMP does not know about watermarks -- then the
camera may treat the file as invalid and refuse to display it.
I should add that I'm going pretty far beyond my knowledge here.
While I'm reasonably confident that this sort of digital watermarking
does exist, I am only speculating that this accounts for your
problems -- particularly with the photo-printing service.
Best wishes,
-- Bill
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