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Dithering Algorithm for convert 24bit RGB image to 4bit CMYK image ?

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minhcom

Posted: Friday, July 08, 2005 12:09:00 AM

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Joined: 7/8/2005
Posts: 2
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Hi everybody,

I'm from Viet Nam, now i'm a developer. In my project, I use DIB to store my bitmap. This Bitmap is 24 bit CMYK. But I want to Dithering this Bitmap to 4bit CMYK. I don't know any dithering algorithm for this task.

Any body can help me?

Thanks much!

Andrew

Posted: Friday, July 08, 2005 4:50:00 AM

Rank: Advanced Member
Groups: Administration , Member

Joined: 8/2/2003
Posts: 708
Points: 105

Hello Minhcom,

Are you sure you are working with CMYK bitmaps? CMYK has 4 color channels, so it usually occupies 32 bits. Anyway, GDI does not support any CMYK pixel formats (at least officially).

If you mean RGB, you can do it with Graphics Mill.

P.S. Note, Graphics Processor is discontinued product. You should use Graphics Mill instead (unless you have a lot of legacy code with Graphics Processor).

P.P.S. If you have any questions regarding Graphics Mill, please post a message to Graphics Mill forum.

Sincerely yours,
Andrew Simontsev from Aurigma Team

minhcom

Posted: Friday, July 08, 2005 9:18:00 PM

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Joined: 7/8/2005
Posts: 2
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Hello Andrew,

Sorry about my type. My bitmap is 24bit RGB. So I want dither it to 4bit CMYK image.

Thanks again! :P

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