Thank you.

Regarding transparency (clipping I fully am convinced that is doable, just wondering how), I looked at that but

    {\starttransparent[tnormal]\externalfigure[cow.pdf][width=9cm]\stoptransparent}

makes the entire PDF transparent, not just one colour inside that PDF.

Gerben Wierda (LinkedInMastodon)
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On 30 Jul 2024, at 01:03, Bruce Horrocks <ntg@scorecrow.com> wrote:



On 29 Jul 2024, at 21:59, Gerben Wierda <gerben.wierda@rna.nl> wrote:

I have a large PDF with mostly vector and a bit of pixel graphics. It is in two colours only (the pixels are either one colour or the other, no dithering). I want to create a new PDF of a segment of the larger PDF (bottom left corner), where vector is maximally preserved, and where one colour is replaced by 100% transparency.

I was wondering if that is doable by using LMTX instead of trying to do this with some GUI app.

I would start with \clip & \setupclipping to obtain the segment, and \definetransparency to set one of the colours to be transparent.
<https://wiki.contextgarden.net/Transparency>


Bruce Horrocks
Hampshire, UK

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