Applying effects to figures

Applying effects to figures

[Vyatcheslav Yatskovsky]

Hello,

I just thinkig... Is there a way to apply an effect to inserted images? 
Say, I need to make a shadow around all of screenshots included, and it 
is too laborous to apply the shadow to them in an editor just in order 
to have screenshots changed in next document version. Is think there is 
a lot of circumstances when some automatic effect can be needed.

Best,
Vyatcheslav
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Re: Applying effects to figures

[Peter Rolf]

Vyatcheslav Yatskovsky schrieb:
> Hello,
> 
> I just thinkig... Is there a way to apply an effect to inserted images?

sure, but...

> Say, I need to make a shadow around all of screenshots included, and it
> is too laborous to apply the shadow to them in an editor just in order
> to have screenshots changed in next document version. Is think there is
> a lot of circumstances when some automatic effect can be needed.
> 

you should ask yourself, if there is not a simpler way to do so. see

http://www.imagemagick.org/Usage/convolve/#shadow_montage


best wishes, peter


> Best,
> Vyatcheslav
> ___________________________________________________________________________________
> 
> If your question is of interest to others as well, please add an entry
> to the Wiki!
> 
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
> 
> 

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Re: Applying effects to figures

[Henning Hraban Ramm]

Am 2009-05-25 um 21:05 schrieb Vyatcheslav Yatskovsky:

> I just thinkig... Is there a way to apply an effect to inserted  
> images? Say, I need to make a shadow around all of screenshots  
> included, and it is too laborous to apply the shadow to them in an  
> editor just in order to have screenshots changed in next document  
> version. Is think there is a lot of circumstances when some  
> automatic effect can be needed.

ImageMagick does support such effects; probably you could update and  
enhance or at least get inspiration from the degrade module:
http://modules.contextgarden.net/t-degrade


Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

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Re: Applying effects to figures

[Peter Münster]

On Mon, 25 May 2009, Henning Hraban Ramm wrote:

> ImageMagick does support such effects; probably you could update and enhance
> or at least get inspiration from the degrade module:
> http://modules.contextgarden.net/t-degrade

And of course, today you should use rather lua than bash scripting!
To use ImageMagick, there is always os.execute(...).
Cheers, Peter

-- 
Contact information: http://pmrb.free.fr/contact/

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Re: Applying effects to figures

[Wolfgang Schuster]

Am 25.05.2009 um 21:05 schrieb Vyatcheslav Yatskovsky:

> Hello,
>
> I just thinkig... Is there a way to apply an effect to inserted  
> images? Say, I need to make a shadow around all of screenshots  
> included, and it is too laborous to apply the shadow to them in an  
> editor just in order to have screenshots changed in next document  
> version. Is think there is a lot of circumstances when some  
> automatic effect can be needed.

\startuseMPgraphic{shadow}
fill OverlayBox shifted (5pt,-5pt) withcolor .7white ;
setbounds currentpicture to OverlayBox ;
\stopuseMPgraphic

\defineoverlay[shadow][\useMPgraphic{shadow}]

\starttext

\externalfigure[mill][background=shadow]

\blank

\setupexternalfigures[background=shadow]

\externalfigure[hacker]

\stoptext

Wolfgang

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