bugGNU Octave - Bugs: bug #42474, saving jpg images with imwrite...

 
 

bug #42474: saving jpg images with imwrite changes image

Submitted by:  Ian Journeaux <ijourneaux>
Submitted on:  Sat 31 May 2014 04:12:34 PM UTC  
 
Category: Octave FunctionSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Regression
Status: DuplicateAssigned to: None
Originator Name: ijourneaiuxOpen/Closed: Closed
Release: 3.8.1Operating System: Any

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Wed 04 Feb 2015 04:04:32 AM UTC, comment #3:

This bug is still present on the development branch. It doesn't seem to be restricted to operating system either. I just reproduced it on a Linux machine with a recent Mercurial tip.

I tested in 3.6.4 and it is a correct grayscale.

Rik <rik5>
Project Administrator
Mon 02 Jun 2014 03:16:54 PM UTC, comment #2:

I started building MXE-Octave on a local machine. The problem saving to jpg exists with a recent build (June 1) of Octave.

Ian Journeaux <ijourneaux>
Mon 02 Jun 2014 01:33:57 PM UTC, comment #1:

You mentioned on bug #41673 that it was working fine now?

Carnë Draug <carandraug>
Project Member
Sat 31 May 2014 04:12:34 PM UTC, original submission:

Saving to jpg format is incorrect. here is a quick way to reproduce the error.

a = repmat (uint8 (0:255), 100, 1);
imwrite (a, "test.jpg");
imwrite (a, "test.fif");

The jpg image is incorrect while the tif image is correct.

I should have reported this some time ago.

Ian Journeaux <ijourneaux>

 

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    Follow 5 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Wed 11 Feb 2015 05:37:27 PM UTCcarandraugStatusConfirmed=>Duplicate
      Open/ClosedOpen=>Closed
      Dependencies-=>Depends on bugs #41673
    Wed 04 Feb 2015 04:04:32 AM UTCrik5StatusNone=>Confirmed
      Operating SystemMicrosoft Windows=>Any

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