Re: JPEG versus TIFF
- From: noone@xxxxxxxx (Hunt)
- Date: 24 Jul 2005 23:05:34 GMT
In article <sRTEe.5467$dM3.2949@trnddc04>, bigislandhilo@xxxxxxxxxxx says...
>
>I have dozens and dozens of images I have created in JPEG format using PS7.
>I sell small prints and greeting cards at a local market. The prints are
>usually no bigger than 8X10, and printed on a inkjet printer.
>
>I've had no problem with the results I get, but I have heard that it is
>better to save images in a TIFF format. Originally, I do a lot of editing
>of the first image applying filters, layers, actions, etc. Will I maintain
>better detail if I work in TIFF format? Since most of the original images
>are JPEG should I convert them to TIFF before I start editing?
>
>I do notice that if I re-open a closed JPEG image that has a lot of white
>background that I often get lots of "ghost like colored pixels" in the white
>area.
>
>Also would there be any value in converting all the images I currently have
>into a TIFF format?
>
>I something of a creature of habit, but I'm wondering if I should change my
>whole approach to working with images in PS7.
>
>A lot to ask for, but any advice would be appreciated.
>
>Thanks, Gene
Gene,
As you state, your workflow methods seem to be working well. However, as you
also state, when JPG'ing a JPG, you get artifacts.
If you shoot in JPG format, I'd recommend saving the file in PSD, when you
first open it to edit it. When you then Flatten (any Layers) and re Save_As
JPG, you will gain some artifacts and loose some data, however, that will be
as bad as it gets, if you always go back to the PSD, edit some more, then
Save_As JPG. It will be the same as doing that the first time, except with the
edited changes.
Now, as your business progresses, you might want to consider shooting in TIFF,
or RAW, doing your edits first THEN saving to JPG, or supplying your printer
with a TIFF image, maybe with LZW compression. Another possibility in this
workflow situation would be to Open the RAW in Adobe's DNG converter, save it
as a DNG, then either Open that, or go back to your RAW and Open in PS. There
has been some discussion lately on the various camera mfgr's RAW formats. DNG
may some day be the answer to that.
Hunt
.
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