pixma MG5350 scan problem in linux

[brice83]

hello, 

i recently buy a pixma MG5350, i've install it in windows with product CD and in linux with the drivers provide in canon website.

when i scan an image in linux, there is a gray taint and i don't know how to get a white background when the original paper is white. you can see what i mean in this images:

any way to correct this in linux? i'm in opensuse and use scangearmp to scan. i also try in archlinux with scangearmp and xsane, and got the same result.