On Fri, 14 Sep 2012, Troy Henderson wrote:
I put together this little utility for converting a color EPS/PDF/SVG to
grayscale.
http://www.tlhiv.org/grayscale/
Selecting "invert" swaps colors from white to black and black to white.
So, using a black/white graphic on a transparent background should
transform it to a white/black graphic on a transparent background.
Testing is certainly necessary.
Interesting. At some stage I might revive the webfilter branch of the
filler module so that such services can be accessed from within ConTeXt.
See the following post for details:
http://randomdeterminism.wordpress.com/2010/08/12/using-filters-outside-the-box/
In case anyone is interested, this blog post was talking about code
available at
https://raw.github.com/adityam/filter/web/t-filter.tex
https://raw.github.com/adityam/filter/web/t-filter.lua
At some stage I decided to delete these features from the filter module
and move it to a separate module. The code is available at
https://github.com/adityam/context-webfilter
but I haven't used it for about 2 years, and given all the changes in the
internal namespace, I doubt it will run without modifications.
Nonetheless, the idea is that a user can use such services using:
\definewebfilter[grayscaleimage]
[prefix={http://www.tlhiv.org/grayscale},
method=POST,
... some other options ....
]
and then use
\grayscaleimage{local-image.eps}
This will call the web-service and cache the result.
Aditya
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