Scanning in black and white, not grayscale, seems to work very well as well. By changing the contrast, etc., you can make things more readable than with and the files are smaller.
I am a fan of rebates for computer parts and the sales slips are often so light that it is very hard to see them unless I change the contrast to -15 or -20, and scan with B+W at 300 DPI. This is also the preferred scan for Optical Character Recognition, which is a way that could be used to get the text of the consult letters received right into VistA while keeping the scanned image only for BU and the signature, etc. On Monday 10 October 2005 11:44 am, James Gray wrote: Since no one has apparently discussed these issues on this topic I will point some things out. Kevin, By BW do you mean gray scale (8 bits per pixel) or bitmapped (1 bit per pixel)? I assume you mean gray scale. You can very good documents this way. First scan a document at 300 dpi or higher, then increase the contrast of the image, then apply a good unsharp mask to the document. Then you can reduce the resolution down to 150 dpi. If you take these steps you will end up with documents that are *MORE* readable than documents scanned at 300 dpi and left that way. The steps could be automated so that it works well. Also jpeg compression can give you documents that are 10% of the size of the uncompressed image with little loss in such "images". Jim Gray ----- Original Message ----- From: "Nancy Anthracite" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, September 28, 2005 9:53 AM Subject: Re: [Hardhats-members] Imaging Disk requirements? > The OCR programs I have used require 300 dpi, and I suspect that might be > something that should be considered for the future as it may be that not > only > typed but hand written notes could be loaded right into the database in a > compact fashion and the scanned images archived for backup purposes only. > > On Wednesday 28 September 2005 08:49 am, Mike Schrom wrote: > I think fax scans are lower about 150 dpi, but still, usually, readable. > That's a factor of four smaller file size, but even at 300, your figures > yield about 25,000 charts per terabyte. That's four 250 gig hard drives > at about $50 each (on sale). > > Mike > > Kevin Toppenberg wrote: >> As I get close to completing a document imaging system that uses >> standard VistA Imaging code, I have wondered what use of the system >> will do to my disk space. >> >> Does anyone know what typical scanning resolution is (300 dpi?), and >> how much disk space this would take in BW, compressed as JPG file? I >> am guessing about 150k per image (image size 8.5x11 inches). If I did >> my math right, that would be about 6,600 images per gigabyte. Many of >> my charts have about 200 pages in them, so this would be about 25 >> complete charts per gigabyte. >> >> I am asking this because I am not planning on implementing the >> background processor that archives images off of the magnetic disks >> into an optical jutebox. It seems that disk drives are growing in >> size fast these days. >> >> Any thoughts? >> >> Thanks >> Kevin >> >> >> ------------------------------------------------------- >> This SF.Net email is sponsored by: >> Power Architecture Resource Center: Free content, downloads, discussions, >> and more. http://solutions.newsforge.com/ibmarch.tmpl >> _______________________________________________ >> Hardhats-members mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/hardhats-members > > ------------------------------------------------------- > This SF.Net email is sponsored by: > Power Architecture Resource Center: Free content, downloads, discussions, > and more. http://solutions.newsforge.com/ibmarch.tmpl > _______________________________________________ > Hardhats-members mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/hardhats-members > > -- > Nancy Anthracite > > > ------------------------------------------------------- > This SF.Net email is sponsored by: > Power Architecture Resource Center: Free content, downloads, discussions, > and more. http://solutions.newsforge.com/ibmarch.tmpl > _______________________________________________ > Hardhats-members mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/hardhats-members ------------------------------------------------------- This SF.Net email is sponsored by: Power Architecture Resource Center: Free content, downloads, discussions, and more. http://solutions.newsforge.com/ibmarch.tmpl _______________________________________________ Hardhats-members mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/hardhats-members -- Nancy Anthracite ------------------------------------------------------- This SF.Net email is sponsored by: Power Architecture Resource Center: Free content, downloads, discussions, and more. http://solutions.newsforge.com/ibmarch.tmpl _______________________________________________ Hardhats-members mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/hardhats-members
