Craig Bower wrote: > "Paul Schlyter" <pausch@NOSPAMsaaf.se> wrote in message > MPG.1d2a715abb76dea39896cc@news.individual.net">news:MPG.1d2a715abb76dea39896cc@news.individual.net... > >>Yes: never store the images as JPG when small detail is >>important. Instead choose a file format with non-destructive >>compression, such as GIF, PNG or TIFF. To cut down the size >>of the image file as much as possible, instead try to minimize >>the number of colors in the image. These images are frequently >>black-and-white, so scan them in as such - or convert the image >>after the scan from "color" to "greyscale". Next, cut down the >>number of grey levels as much as possible. 16 grey levels usually >>works fine here (each pixel will then only occupy 4 bits of data >>in uncompressed form). Even just 2 grey levels may work (i.e. just black >>and white, no shades of gray) - if so, the size of the image is really >>minimized, since each pixel will then occupy only one single bit in >>uncompressed form. A 2 gray level b&w image, saved as a GIF file, can >>be considerably smaller than a JPG file at the same resolution - this >>may allow you to scan the image at still higher resolution, without >>the GIF file getting larger than the JPG file at the original resolution. > > > Hi Paul, > > I gave 'er a go, and really minimized a lot of the filesizes accordingly! > > Thank you for the pointers! - I'm currently going with 4-bit color, > greyscale where no color exists. And the filesizes are incredibly > smaller, yet still look decent enough to be readable! - The Graphics > Tablet manual came down in size from 17 odd MB to about 6 MB > just by converting to GIF, greyscale, 4 bpp! > > Thanks again, > Craig > > What about OCR'ing the text and keeping the graphic parts at 4 bits that would reduce the size drasticly. Thanks, Mark Frischknecht
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