[magick-users] very wierd convert problem

[Anthony Thyssen]

"Christina Williams" on  wrote...
| Hi all,
| 
| I am observing a difference in the convert function between version 5 and
| version 6 of IM. On one computer with version 5.3.8, raw 8 bit images are
| converted to grayscale 8 bit pngs, but on computers with version 6 (I've
| tried 6.3.0 and 6.2.8), the same images are being converted to 24 bit RGB
| images, even after I specify -depth 8 gray. Here is the command I'm using
| 
| convert -size 1023x1023 -depth 8 gray:filename.raw filename.png
| 
See IM Examples,  Basics...
   http://www.imagemagick.org/Usage/basics/
It contains the basic differences between IM v5 and IM v6.

try outputing to   PNG8:filename.png
for a 8 bit pallette image.

| I was able to force it into making a grayscale by adding -type GrayScale,
| but I'm not convinced that I dont lose information by doing this, and I'd
| prefer to convert the image correctly.
| 
The  -type GrayScale   would also help in this regard.

See  http://www.imagemagick.org/Usage/basics/#type

  Anthony Thyssen ( System Programmer )    <A.Thyssen at griffith.edu.au>
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    Man may come, and man may go, but the earth abides.  -- "The Earth Abides"
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     Anthony's Home is his Castle     http://www.cit.gu.edu.au/~anthony/