Re: [GM-help] A major performance issue

[David H. <har...@er...>]

Hi Bob,
Some time ago you suggested I should use the following commands to 
generate a tiff image "Watermarking".
My question:
The +matte option means to disable this the matte option. What is done 
internally to the image when this option is selected assuming I have an 
Image variable or a ImageInfo variable?

Bob Friesenhahn wrote:
> On Tue, 7 Jun 2005, David Harel wrote:
> 
>>
>> Didn't do any of those, I take it you're thinking on saving the 
>> composite image in none compression format and then do the stuff. If 
>> that is the case, please add the options you mention to the commands 
>> below cos I am not sure I fully understand how to use them.
> 
> 
> Prepare a bilevel image with transparent white background, avoiding 
> (broken) compression:
> 
>   gm convert -pointsize 72 -rotate 30 label:"kuku" +dither \
>     -type bilevel -transparent white -compress none muku.tif
> 
> Perform composition, avoid slow dithering to black/white, use Group4 
> compression, ensure that result does not include transparency:
> 
>   gm composite muku.tif big.tif +dither -compress Group4 +matte \
>     bit.wtm.tif
> 
> I tested the above commands and they work for me.
> 
> Bob
> ======================================
> Bob Friesenhahn
> bfr...@si..., http://www.simplesystems.org/users/bfriesen/
> GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
> 
> 

-- 
Thanks.

David Harel,

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