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Convert PDF with color image to Monochrome image |
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Ingo
Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524 |
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Posted: 15 Nov 19 at 8:10PM |
Hi John,
few years toolate but... ;-) Here's an older thread dealing with a similar issue. QuickPDF can do at least a little bit: http://www.quickpdf.org/forum/forum_posts.asp?TID=2088&KW=monochrome&title=convert-pdf-to-bmb-with-monochrome-color |
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Cheers,
Ingo |
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tfrost
Senior Member Joined: 06 Sep 10 Location: UK Status: Offline Points: 437 |
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In my experience, dithering color to monochrome is best done with a specialist graphics library. You may have to choose the dithering algorithm to suit the type of image you start with. Obviously, the availability of good graphics libraries depends on what programming language you are using.
If you start with DARenderPageToStream you can create a color bitmap with the correct resolution and scaling. Then use your graphics library to convert this to monochrome. Finally, if your destination happens to be 200dpi fax, convert your monochrome bitmap to a TIF with the appropriate fax encoding. |
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John_Hagglof
Beginner Joined: 16 Oct 14 Location: Sverige Status: Offline Points: 2 |
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Hello,
I need to:
Convert PDF with color image or greyscale to Monochrome image. Resample down to 300/200 dpi. I have Debenu Quick PDF Library 11 Best regards John
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