from grepping through the sources i am quite confident that simple-scan uses "--resolution" exclusively and ignores "--x-resolution" and "--y-resolution"
so if above commands work, we have the explanation.
ps: possibly you need:
--resolution-bind=no as in
scanimage --resolution-bind=no --x-resolution 600 --y-resolution 600 > si-600-600.pnm scanimage --resolution-bind=no --x-resolution 600 > si-600--.pnm scanimage --resolution-bind=no --y-resolution 600 > si---600.pnm
from grepping through the sources i am quite confident that simple-scan uses "--resolution" exclusively and ignores "--x-resolution" and "--y-resolution"
so if above commands work, we have the explanation.
ps: possibly you need:
--resolution- bind=no as in
scanimage --resolution- bind=no --x-resolution 600 --y-resolution 600 > si-600-600.pnm bind=no --x-resolution 600 > si-600--.pnm bind=no --y-resolution 600 > si---600.pnm
scanimage --resolution-
scanimage --resolution-