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>> Who knows an aplication for clean up images after scanning process? I >am >> scanning from old books into PDF files at 300 dpi, but the OCR is not >good >> because the images are bad quality. > >Sorry, but you are scanning MUCH too low a resolution - 600 or 900 is the >minimum. With all due respect, 300 dpi is NOT "MUCH too low". Resolution is an application-dependant issue. There is no "correct" resolution for anything. 300 dpi is just fine for the vast majority of scanning needs. It delivers adequate OCR results, and the text is highly readable on-screen and in-print. I would not go lower than that, for sure. Many high-speed scanner can scan at a MAXIMUM of 300 dpi. 600 dpi is traditionally the minimum resolution that archivists accept. It's also highly desirable if the page contains very small print, math, equations, and so on. However, the file-size at 600 dpi is dramatically larger than with 300 dpi scans (assuming conventional compression). For most applications, the increase in image-quality isn't worth the file-size. As to the original question - ScanFix is a typical application for batch image-cleanup. It's made by TMSSequioa. http://www.tmssequoia.com/ If you just need ad-hoc cleanup of a few pages, the simple Imaging utility in Windows does just fine. Yeah, you can pay a lot - but only do it if you have industrial-scale needs. The real solution to poor-quality images, however, is good quality scanning. Do good work on the front end, and everything else goes a LOT easier downstream. Duff Johnson Document Solutions, Inc. www.document-solutions.com To change your subscription: http://www.pdfzone.com/discussions/lists-pdf.html
