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and subject line Bug#318780: Rotation Problem
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From: Benjamin Mesing <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: libjpeg-progs: [jpegtran] pixelshift on rotation
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Date: Sun, 17 Jul 2005 18:55:49 +0200
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Package: libjpeg-progs
Version: 6b-10
Severity: normal
Hello,
when using jpgtran from gqview to rotate my photos, it sometimes happens that
some lines from the top of the image are inserted at the bottom (wrapped
around).
This happens only sometimes but reproducable - I suspect it has to do with
the aspect ratio and the orientation.
E.g. it happens for x > y rotating ccw.
The same thing happens somtimes with a left to right shift.
Greetings Ben
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ii libjpeg62 6b-10 The Independent JPEG Group's JPEG
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Date: Sun, 31 Jul 2005 00:28:47 +0200
To: Benjamin Mesing <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
Subject: Re: Bug#318780: Rotation Problem
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From: Bill Allombert <[EMAIL PROTECTED]>
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On Fri, Jul 29, 2005 at 06:31:13PM +0200, Benjamin Mesing wrote:
> I was so annoyed by this problem, that I took a look into the jpegtran
> sources on my own. However the comments found there lead me to believe,
> that this is due to a limitation of the jpeg format. I have also found a
> hint to this in the man pages. However I would suggest to write down
> that rotation can cause image "shifts" at the description of the rotate
> option. Currently it is quite hidden and very technical.
Hello Benjamin,
Did you receive my email send to this bug report with the explanation ?
It was supposed to tell you just that. You can look it up here:
http://bugs.debian.org/318780.
> I would suggest to tag the bug "won't fix" or close it (if won't fix
> bugs are not archived this would prevent others from reporting the same
> issue).
This documented feature is reported as a bug about once by year.
That lead me to implement the -perfect option (so you can work-around it
more easily)
I am closing this bug because "won't fix" assume the bug can be fixed
(but will not) which is not the case here.
Thanks for using Debian!
--
Bill. <[EMAIL PROTECTED]>
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