Hi, On Fri, May 17, 2002 at 10:40:54PM +0100, Major A wrote: > Hi, I'm trying to use xsane 0.86 with a Nikon LS-8000ED, which is a > medium-format scanner with a minimum practical preview resolution of > 1000dpi. This generates huge previews whatever I do.
Maybe the backend should provide a smaller resolution and so do the down-sampling itsself. E.g. It could use 100 dpi for preview mode. This also makes network-scanning much faster. > Now the problem > seems to be that I use xsane over an ssh tunnel, and it is exceedingly > slow this way (1 line per second!). Is it possible that xsane wastes > bandwidth when drawing the preview? I assume it doesn't down-sample > prior to displaying, I think that would be a good idea. It looks like xsane starts drawing whenever its buffer is full. If you use a higher resolution, the buffer is full very fast. But that's not the only problem. Memory consumption is very big. I can scan with the test backend with 1000 dpi without problems. But when I set the minimum resolution to 1000 dpi in test.conf, xsane needs 538 MB of memory when doing the preview. The image itsself is "only" 35 MB in size. Bye, Henning
