File format for editting?

RM
Posted By
robison_m
Apr 26, 2004
Views
228
Replies
3
Status
Closed
Newbie here. I can do basic things like lighten up a picture and resize it and crop it and a dozen other simple procedures.

Here is my question. I have a JPG photo. I want to work on it, performing several tweaks like I mentioned above, and then upload it to dotphoto and get prints. Should I convert the JPG to Photoshop format PSD before I do all those changes, and then crank it back to a JPG before I upload to dotphoto? I’m concerned that making multiple changes to a compressed format like a JPG will produce a poorer image with each successive tweak because of the compression routine. On the other hand, I am concerned that converting my JPG to PSD and then recon- verting it back to a JPG might also degrade the quality of the picture.

Because of bandwidth and the amount of pictures I need to upload to dotphoto, it’s probably best to assume that I do need to upload a format to dotphoto with some degree of com- pression.

Thank you, Michael

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N
nomail
Apr 26, 2004
Zspider wrote:

Newbie here. I can do basic things like lighten up a picture and resize it and crop it and a dozen other simple procedures.
Here is my question. I have a JPG photo. I want to work on it, performing several tweaks like I mentioned above, and then upload it to dotphoto and get prints. Should I convert the JPG to Photoshop format PSD before I do all those changes, and then crank it back to a JPG before I upload to dotphoto? I’m concerned that making multiple changes to a compressed format like a JPG will produce a poorer image with each successive tweak because of the compression routine. On the other hand, I am concerned that converting my JPG to PSD and then recon- verting it back to a JPG might also degrade the quality of the picture.

If you do all the tweaks at once, there is no difference. However, if you do some tweaks, save the image, do some more tweaks the next day, and so on, you definitely need to save the image in a format that is not compressed (or not compressed ‘lossy’). PSD is good, TIFF is also good (and LZW compression is not lossy)

Because of bandwidth and the amount of pictures I need to upload to dotphoto, it’s probably best to assume that I do need to upload a format to dotphoto with some degree of com- pression.

Yes, services like that always demand JPEG. They simply do not accept any other format.


Johan W. Elzenga johan<<at>>johanfoto.nl Editor / Photographer http://www.johanfoto.nl/
L
lkrz
Apr 26, 2004
Here is my question. I have a JPG photo. I want to work on it, performing several tweaks like I mentioned above, and then upload it to dotphoto and get prints. Should I convert the JPG to Photoshop format PSD before I do all those changes, and then crank it back to a JPG before I upload to dotphoto?

Make the changes you want and save as .psd.
Then save a copy as a .jpg to send to dotphoto. In Photoshop, just check the "save a copy" box.
Keep the .psd file as the master. It also makes it easier to see what photos you’ve changed and which ones you haven’t.
There are prewritten photoshop actions to batch save as .psd as well as batch save copies as .jpg. At least I think there are. If not, easy enough to write one.

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-xiray-
Apr 29, 2004
On 26 Apr 2004 18:38:02 GMT, (LauraK) wrote:

Make the changes you want and save as .psd.

IF you use the good habit of saving interim copies as you work, I’d modify that as follows:

Open original JPG
Immediately save as a PSD
Work on the PSD
Save final PSD and then save another copy as a JPG with a different file name.

That way if you ever want to go back to the original and start over you can and if you ever want to do further work on the PSD you can.

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