James, Thanks for the info. I had intended 1 bit per pixel. But your advise is appeciated.
I have yet to get the tools in place to let me do all this image manipulations. Thanks Kevin On 10/10/05, James Gray <[EMAIL PROTECTED]> 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 > ------------------------------------------------------- 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
