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Max, You are right about halftones. Typically, one thinks of halftones being an image of different sized dots used in commercial printing. The dots are either black or white and are created, usually, from a greyscale image. However, it took me only two seconds (of processing time), to compress the aforementioned PDF file using Acrobat. Rich -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Maxim Khesin Sent: Wednesday, January 07, 2004 9:49 AM To: [EMAIL PROTECTED] Subject: Re: [PDF-Basics] scanned imports too big PDF-Basics is a service provided by PDFzone.com | http://www.pdfzone.com/ __________________________________________________________________ Hi Richard, > We may be getting a bit confused, here. Some of us may be :) > Black and white is one-bit; halftone (or grayscale which is one and > the same > term) is 8-bits. If they can scan with one-bit, file sizes will be > much less than 8-bits. The original post says they are making halftones. No. Halftone with error diffusion is an algorithm of converting a color space to bitonal, which is done by practically all the scanners. Try http://www.google.com/search?sourceid=mozclient&ie=utf-8&oe=utf-8&q=halftone +error+diffusion So the actual image Bob is dealing with is bitonal. I ran Acrobat with optimizer on a few halftone CAD drawings from my database. It produces compression rates similar to PDF compressor, but runs almost 5 times slower, which may be significant to the customer. Acrobat is a great program, but if all you want is conversion from image and/or PDF compression, PDFCompressor Desktop is a reasonable choice. <start_plug> In addition PDFCompressor Professional is fully programmable (via command-line or API) and has better OCR and directory-walking than Acrobat. It is also significantly faster, which is an ROI on hardware costs and does not have server licensing limitations like Acrobat. </end_plug> max > Acrobat Advocate To change your subscription: http://www.pdfzone.com/discussions/lists-pdfbasics.html To change your subscription: http://www.pdfzone.com/discussions/lists-pdfbasics.html
