Re: Black generation in cmyk output

[Hans Hagen <pragma@wxs.nl>]

Piotr Kopszak wrote:
> On Wed, Dec 01, 2004 at 05:52:09PM +0100, Hans Hagen wrote:
> 
>>Henning Hraban Ramm wrote:
>>
>>>Am 01.12.2004 um 15:19 schrieb Piotr Kopszak:
>>>
>>>
>>>>Sorry for imprecise question. I meant black generation in rgb images
>>>>in JPG format included in document. If it's not possible to control
>>>>the amount of black in that case I'd like to use cmyk JPG images, but
>>>>will they be left untouched by the colour conversion mechanism?
>>>
>>>
>>>AFAIK ConTeXt doesn't touch pixel images at all - that would be a rather 
>>>complicated task, perhaps using little_cms or GIMP libraries or the like...
>>
>>indeed, however, you may expect some manipulations without touching the 
>>bitmap, like runtime turning gray scales into spot colors and duotones; i 
>>have something running here for half a year now but i recently moved the 
>>code into the kernel
>>
>>Hans
> 
> 
> Right, but what exactly happens with included rgb bitmaps 
> when I use: 
> 
> \setupcolors[state=start,cmyk=yes,rgb=no] 
> 
> Will they be left in rgb? 

bitmaps will not be touched by context, so they will stay rgb (i'm currently 
cleaning up some figure postprocessign code, so meybe that end up in the 
distribution)

Hans

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