Computer Graphics with Photoshop

Author

Sony camera jpeg

Brandon

2004-12-27, 4:14 am

I have a Sony Cybershot 5.1mp camera. The images save as JPEG's on the
camera. When I pull these images into Photoshop for editing and then
save them, should I save as a JPEG? Do I lose clarity each time I do
this?

I save some as .PSD for further editing, but I want a common format for
viewing on computer, emailing or printing.

Thanks,
Brandon

bogus

2004-12-27, 12:14 pm

someone can correct me if I am wrong

Yes, you lose clarity everytime you resave a jpeg, Unless you set the
compression to none (100%).

JPEG format is a lossy compression. You set the amount of compression and
that determines how much information is lost.

It will be difficult to have one file that suits all you needs. Viewing on
monitor should be done at 72 pixels/inch whereas printing requires 200 to
300 ppi.

Brandon wrote:

> I have a Sony Cybershot 5.1mp camera. The images save as JPEG's on the
> camera. When I pull these images into Photoshop for editing and then
> save them, should I save as a JPEG? Do I lose clarity each time I do
> this?
>
> I save some as .PSD for further editing, but I want a common format for
> viewing on computer, emailing or printing.
>
> Thanks,
> Brandon
>

Tacit

2004-12-27, 7:14 pm

>Yes, you lose clarity everytime you resave a jpeg, Unless you set the
>compression to none (100%).

Even at maximum compression, there is still image degredation.

--
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Xalinai

2004-12-27, 7:14 pm

bogus wrote:

> someone can correct me if I am wrong
>
> Yes, you lose clarity everytime you resave a jpeg

Up to here you are correct.

> Unless you set the
> compression to none (100%).

This does not help. Even the compression level that create the largest
JPG files will use some compression and this means some degradation.

There are lossless JPG algorithms but the are almost unsupported by
viewers and the compression is a lot less than what you are used from
JPG.

> JPEG format is a lossy compression. You set the amount of compression
> and that determines how much information is lost.

Right again.

But then: The images have already been JPEGged by the camera. Keep the
original JPEGs and do with your edited images whatever you want - you
can re-create them from the original.

Saving the images as TIF only makes sense if you can get RAW files from
the camera.

Michael

Tacit

2004-12-30, 7:14 am