On Fri, Aug 17, 2012 at 1:37 PM, Philip Gwyn <philipgwyn at gmail.com> wrote: > On Fri, Aug 17, 2012 at 1:30 PM, m. allan noah <kitno455 at gmail.com> wrote: >> >> yes- but more likely that the driver does not send set_window if you >> don't change any of the params in it. you might need to power cycle >> the scanner each time. > > > But I do change the params for resolution, mode etc. Without a power cycle, > though. Will try that. > > BTW, I'm beginning to suspect that most of the scanner's features are in > fact implemented in the driver. For params like -t, -l, -x, -y this makes > sense because the entire page has to be feed through the scanner anyway. > > -Philip
It is fairly normal for low-end scanners to do many features in software. Given the price of the scanner in question, i would expect it to be a little smarter than that. The size of your pcap files should vary as you change the x/y values. I will also be more explicit- there is no reason to assume the canon proprietary sane driver fully exercises the capabilities of the machine. I would expect the windows driver to be more complete. allan -- "The truth is an offense, but not a sin"
