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| Subject:
Poor halftoning
From: Christophe Cossement ####@####.#### Date: 9 Jan 2003 16:08:01 -0000 Message-Id: <3E1D9BA4.6050503@tournai.catho.be> Hello. I'm very happy to use the plustek driver for my HP scanjet 2200c. As is said in the man page, halftoning is poor. What are the dither tables that are needed? Who have to provide them? And is there a way to provide some help to that question? Christophe Cossement | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Subject:
Re: Poor halftoning
From: "Jaeger, Gerhard" ####@####.#### Date: 10 Jan 2003 17:29:20 -0000 Message-Id: <18X2qC-13k3xAC@fmrl06.sul.t-online.com> Hi, the halftoning is only used by the parport driver it has been removed for the USB devices, as halftonig can be done by GIMP or any other image manipulation program much better. Halftoning is in fact a binary image, that has been obtained from a gray-scale image by using a filter, which consists out of a 8x8 array (the dither table). The different values inside such an array vary and upon that variation the quality of the image differs.... - it's just image processing which can be done much better by any special program than by the backend itself. Cheers Gerhard On Thursday, 9. January 2003 16:56, Christophe Cossement wrote: > Hello. > I'm very happy to use the plustek driver for my HP scanjet 2200c. As is > said in the man page, halftoning is poor. What are the dither tables > that are needed? Who have to provide them? And is there a way to provide > some help to that question? > Christophe Cossement | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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