Thread View: adobe.postscript.programming
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Started by Beno�t_Schaaf
Thu, 11 Jan 2007 11:31
setoverprint - raster images
Author: Beno�t_Schaaf
Date: Thu, 11 Jan 2007 11:31
Date: Thu, 11 Jan 2007 11:31
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Hi, I have a question concerning the application of the setoverprint parameter to raster images. According to the Postscript Language definition does the setoverprint parameter has effect on the way raster image are typeset? To give some context to this question: we have an application which generates postscript containing raster images. Sometimes in the graphic state setoverprint is TRUE and sometimes setoverprint is FALSE when such a raster image is included. The postscript language reference doesn't seem to state whether the overprint parameter has influence on the raster image. Can a raster image overprint? Thanks, Beno�t
Re: setoverprint - raster images
Author: Alex_Cherepanov
Date: Fri, 12 Jan 2007 00:45
Date: Fri, 12 Jan 2007 00:45
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Beno�t_Schaaf@adobeforums.com wrote: > I have a question concerning the application of the setoverprint parameter to raster images. > ... we have an application which generates postscript containing raster images. > Sometimes in the graphic state setoverprint is TRUE and sometimes setoverprint is FALSE The effect of the overprint flag depends on the current color space and the colorants available on the device. The graphic operation that marks the raster memory is insignificant. CMYK image can overprint non-primary separations. An image in separation color space can overprint other separations including primary separations. DeviceN color space works as multiple separations. Regards, Alex Cherepanov
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