Image processors that I have used include: 1. Irfanview <http://www.irfanview.com/> 2. ImageMagick <http://www.imagemagick.org/script/index.php> *Very Important:* Make sure that you make copies of your originals! -R. On 2010-11-03 05:13, Rosemary Probert wrote: > Hi Ralph, > > Thank you for your reply. > > A further question: how do you reduce the resolution? I can't re-scan > the original and although I've hunted through PSP's "help" files I can't > see anything that seems to fit my problem. Most of the instructions > there are about setting the resolution on the printer. > > Although I just asked about one image I have several dozen that I want > to eventually upload to the site - all with a similar problem. So I > would like to find a generic solution if possible. > > Kind regards, > > Rosemary > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > On 02/11/2010 20:18, Ralph Taylor wrote: >> Rosemary asked about reducing the byte size of a 546kb image for displaying >> on her website. >> >> Others have given good suggestions. To summarize, there are only three ways >> to cut a raster image file's size: >> >> 1. Reduce the dimensions. A 8" by 8" image needs (other things being equal) >> four times as many bytes as a 4" by 4". This isn't done by specifying >> display size in the HTML page, but to the file itself with a >> graphics-editing program. The saving is proportional to the products of the >> before& after dimensions. >> >> 2. Reduce the resolution. Any resolution greater than, say, 100 pixels per >> inch is wasted; computer monitors can't display the extra pixels and many >> are limited to 72. The saving is proportional to the ratio of the before& >> after resolutions. >> >> 3. Convert to gray-scale, especially if the original is in monochrome (black >> & white). A typical color image requires 24 (or more) bits per pixel; gray >> scale requires 8 bits (1 byte), a saving of two-thirds or more on the file >> size. >> >> For documents, there is a non-image approach: Transcribe the document into >> text. This will produce the greatest savings of all. >> >> -rt_/) -- Regards, Rod Dav4is / P.O. Box 118 / Hyde Park, NY 12538 / USA Trustee and Webmaster Little Nine Partners Historical Society http://www.rootsweb.ancestry.com/~nylnphs/ Personal website: Genealogy, et Cetera: http://freepages.rootsweb.ancestry.com/~dav4is/