[sane-devel] canon lide 200 sane-backends-1.0.27 --res=300 issue

Robert A. Schmied uwppp at flash.net
Mon May 14 21:08:18 BST 2018

aloha saners (and xsaners)

with both scanimage and xsane there appears to be an issue
with --resolution=300 for my canon canoscan lide 200.

with --resolution=300 --depth=8 and [ --mode=gray | --mode=line ]
the scan works ok.

however, with --resolution=300 --depth=8 --mode=color
the pixels are stretched in the +y direction and the scan
stops at about y_pixel 3294 (about 1/2 of sheet at  y-length 142 mm).

if i run a scan with 16 bit depth in --mode=gray the y pixel
stretching starts at y-length 82 mm.

very limited testing with --res=600 and higher does not show this
problem for any -y values.

if there is anything i can do to help the genesys backend
maintainers identify and resolve this issue contact me either
directly r a s \x40 a c m \x2e o r g or via the sane-devel mail list.

my platform is solaris 10 update 8, sparc iii bigendian.
sane is configured to use the kernel usb ugen driver with
the sun version of libusb ( #define HAVE_LIBUSB_LEGACY 1 ).

     $     sane-find-scanner 
found USB scanner (vendor=0x04a9 [Canon], product=0x1905 [CanoScan], chip=GL847) at libusb:/dev/usb:4a9.1905/0

     $     scanimage -T
reported no failures

     $     scanimage -T --resolution=300 --depth=8 --mode=color
reported no failures



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