How to edit photos on camera...

I want to be able to edit a photo that is on my camera and be able to
save it back to the memory card and have the camera be able to display
it. I tried copying the file to my computer, editing it, saving it in
Photoshop as a JPG and putting it back on my camera but my camera says
it can't display the file. I know the file has to be in the exact
format that the original was but how can I find out what that is? How
can I store it correctly in Photoshop so my camera can display the
image?
I have a Casio Exilim EX-S100 if that helps.
Thanks.

Some cameras can do this others can't. My Nikon 995 would crash if I
put images on the card, my Sony F828 will show just about anything. I
am not sure what all the camera looks at when it is deciding what it
can and can not show but I know for the 995 if did any edits to the
photo it would not show.

If you do find out how to do it let us know.

Scott

wrote in message
oups.com...
I want to be able to edit a photo that is on my camera and be able to
save it back to the memory card and have the camera be able to display
it. I tried copying the file to my computer, editing it, saving it in
Photoshop as a JPG and putting it back on my camera but my camera says
it can't display the file. I know the file has to be in the exact
format that the original was but how can I find out what that is? How
can I store it correctly in Photoshop so my camera can display the
image?
I have a Casio Exilim EX-S100 if that helps.
Thanks.

I think the camera writes a file to the card with the images on it. When
you simply copy an image to the card using other software it's there, but
the camera doesn't recognize it unless it was originally produced by the
camera -- I think that's the problem.

tried copying the file to my computer, editing it, saving it in
Photoshop as a JPG and putting it back on my camera but my camera says
it can't display the file.
Your camera contains a computer program, called firmware, which it uses to
compress images to jpeg and uncompress them. To keep cameras small and
cheap, they don't contain a lot of memory so the writers of the firmware
have to keep their code small. To do this, they sometimes have to cut
corners.

The jpg file specification has all sorts of optional bits, and allows you to
lay out the jpg file in a variety of ways. Well written computer software
will cater for all eventualities but camera firmware may not be able to do
so because of the aforementioned lack of space.

As a result, the camera's firmware code is frequently written so that it
only understands the "flavour" of jpg layout which it, the camera, can
produce.

Keith