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Today's Topics:
1. Re: file extensions and when to use them (Patrick Shanahan)
2. Re: file extensions and when to use them (David Gowers)
3. Re: file extensions and when to use them (David Hodson)
4. Re: file extensions and when to use them (norman)
5. installing scripts (norman)
6. Re: installing scripts (Choi, JiHui)
7. Re: installing scripts (norman)
8. Re: installing scripts (Choi, JiHui)
--
Message: 1
Date: Fri, 21 Mar 2008 20:18:25 -0400
From: Patrick Shanahan [EMAIL PROTECTED]
Subject: Re: [Gimp-user] file extensions and when to use them
To: gimp-user@lists.XCF.Berkeley.EDU
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=us-ascii
* norman [EMAIL PROTECTED] [03-21-08 13:06]:
I usually shoot in RAW and convert with UFraw plugged in GIMP. Then I
have a choice of extensions to use for saving the file produced. I
presume that if I use .xcf there is no compression and if I use .jpg
there will be some compression. When working on the file I assume it is
best to save as .xcf and not to use .jpg until the picture is finalised.
I would like to know how the contents of the .jpg file so formed compare
with the contents of a .jpg saved directly on the camera.
The reason I ask is because I would like to use PTLens to remove CA but
it seems that the software will only work with .jpg.
*compression* is not the problem as such. lossey compression is
the problem, you *lose* some of the definition of your object/picture
when you *save* it as jpg. jpg is a lossey compression scheme.
If ptlens is your *only* choice, you have no choice except to perform
that operation as the last operation. You will still have a minimum
of two lossey saves.
The plugin version of PTlens supports TIF files (the standalone does
not!). I am using the plugin with GIMP 2.4.1 on windows xp with no problem.
Peter Taylor
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