problem with -resize, grey square appears on picture

[heligert]

Hi,

When resizing photoes using

Code: Select all

/usr/bin/convert 26623.jpg -quality 80 -resize 650x450 test.jpg

on the command line, sometimes (!), a strage grey square appears in the lower part of the image, as if the image wasn't fully created. In, I guess, 90% of all cases, the resizing works as expected.

Any idea what could be the problem?

Thanks in advance,

hg

[fmw42]

what version of IM are you using? if old, try upgrading.

post a link to one of your images and others can take a look

[heligert]

Hi,

This is an example image: http://www.flickr.com/photos/86282986@N00/4166709805/,
imagemagick is running on a managed server, not sure about the version ...

[Bonzo]

We need your original image so it can be tested.

Upload and run this code to display your version:

Code: Select all

<?php
echo "<pre>";
system("convert -version");  
echo "</pre>";
?> 

[heligert]

OK, thx... here the version info:

Version: ImageMagick 6.2.4 07/28/09 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2005 ImageMagick Studio LLC

the original image can be downloaded at: http://www.flickr.com/photos/86282986@N00/4167541144/

I'd like to repeat that the mentioned error doesn't appear always ... just sometimes
the resizing seems to stop before finishing off completely...

Thanks in advance for your help, guys!

hg

[Bonzo]

It converts OK for me but that does not tell us a lot; as you say it looks as though the process stops part way through.

Your version of IM is old - 2005 version.

Try adding modifying the command to:

Code: Select all

/usr/bin/convert -size 650x450 26623.jpg -quality 80 -resize 650x450 test.jpg

It should speed up the process.

[fmw42]

I had no problem with this image using IM 6.5.8-4 Q16 Mac OSX Tiger.

convert testimage.jpg -resize 650x450 -quality 80 testimage2.jpg


If Bonzo's suggestion does not work, try putting -quality last as above. But I suspect your IM is old and buggy or you have some corrupt images. Version 6.2.4 is over 300 versions old. You really need to upgrade it.