On Thu, 13 Sep 2012, pol stra wrote:
Off-topic for this mailing list, but on-topic for you: You can do this with Inkscape. * Install Inkscape: http://inkscape.org/download/?lang=en * Open the EPS in Inkscape Working white-on-white sucks, so * File > Document properties > click to the right of 'Background:', below the Default units dropdown * Choose something nice and pastel-coloured with alpha (opacity) set to non-zero. * Select the object * Object > Ungroup (Ctrl+Shift+G) to make Inkscape see the individual paths, instead of a single EPS object The single rectangle selecting the object has now turned into a heap of rectangles. * With the colours at the bottom, set the fill to be red with click and/or set the stroke to be red with Shift+click This will probably not have the desired effect because some of the constituent paths will have black fill+transparent stroke, and with others it will be the other way round. So you'll have to set fill/stroke individually. * Select paths in turn, and set their fill/stroke as appropriate. Their respective values are shown in the bottom left. If you select multiple paths and their fill/stroke is different, it will be shown as "mixed"; when multiple paths' fills/strokes are not mixed they are identical, and you can change them all at once. (Depending on ... file-related things ... you may need to use Path > Object to Path at some point, and possibly Path > Break Apart. But probably not.) Good luck! --SietseThanks Sietse I already tried the inskape way, but it’s too much work if you have many files to proced. But your answer gave me the idea to use imegemagick, so I found this trick: convert -background none -density 300 -negate a1.EPS bbb.png I do not know why, but the same command with an EPS output gives me a white background so I had use a png file. The result is good enough for me.
If you want to use eps images, why not just use a white background at ConTeXt end (as you had stated in your first message).
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