Dave Sprinkle mused: > > John Francis wrote: > > > Dave Sprinkle mused: > > > >>Hi, > >> > >>I've been trying to work with a TIF file~650K, that is a blueprint > >>of 1 floor of our Physics building. 1 computer I'm trying to use is > >>a 1G AMD Athalon, with 768 mb ram, running XP Pro. I've been trying > >>to open the file with Windows Picture and Fax Viewer. The file does > >>open but extremely slowly, and it is imposible to do anything after > >>it is open. Eventually the program locks up and I have to give up. > >> > >>I also tried PSP 9 on another computer with the same luck. Am I missing > >>something? > > > > > > I'd assume a blueprint is probably a monochrome image. > > Even there, though, 650K bytes would be less than 6MP; > > that should be an easy fit into your machine. > > > > But it's probable that the TIFF file is compressed - > > if you've got a copy of tiffinfo (or can find one on > > the web, see what the actual image dimensions are. > > > > I'd bet it's really a lot larger than 2K x 3K or so; > > large enough that your machine has problems with it. > > Don't forget that your machine is going to want 32 > > bits for each pixel, even if the image file only has > > one bit/pixel. > > > > Thanks > I'm afraid you're right: W-16959 pixels x H-11392 pixels, > resolution HxV 400 dpi x 400 dpi, Bit depth 1. > Creation Software: Oi/GFS, writer v 00.06.02. > I guess this would indicate an uncompressed file > size > 200mb. What size windows system would handle > a file like this?
That's almost 200 megapixels; I'd bet it uses closer to 750MB (you probably need a bitmap that matches your screen depth), in addition to 200MB for a 1-byte-per-pixel image. I'd suggest a machine with 2GB of RAM to try and process it. Do you really need that much resolution? If not, you could easily write (or get someone to write) a quick utility to downsample the image.
