Mickael, thank you for the report. I thought I had fixed this problem previously, but I am apparently wrong. I will investigate.
allan On Mon, Oct 3, 2016 at 12:13 PM, PELUARD Mickael <[email protected]> wrote: > Hello, > > > > we used Fujitsu scanner (fi-5110 / fi-5120 / fi-6110) for a > long time with an old linux plateform and sane (1.0.22-9). These scanners > used the fujitsu backend. > > > > We have recently changed to RHEL-6 with sane-backends-1.0.21 > and to Debian with libsane-1.0.25. > > > > We scan in lineart mode and we only put the threshold option > to reduce the size of document : scanimage –d ‘fujitsu:XXX:XXX’ --resolution > 150 --mode lineart --threshold 140 > > Then we convert the image to PDF-A1. With the old plateform > and rhel-6, no problem. But with Debian and sane-1.0.25, the size of the > documents increase a lot. > > > > Using a reference document, we get the following results with a fi-6110 : > > - Rhel-6 / sane-1.0.21 = around 50 ko > > - Debian / sane-1.0.25-2 = around 350 ko > > It’s quite the same problem if we used a fi-5110c and fi-5120c. > > > > I downgrade the libsane package and look the result : > > - Debian / libsane-1.0.22-7 = good > > - Debian / libsane-1.0.23-3+b1 = good > > - Debian / libsane-1.0.24-1 = NOT GOOD > > - Debian / libsane-1.0.24-8u5 = NOT GOOD > > - Debian / libsane-1.0.26Git = NOT GOOD > > > > I change the value of threshold on Debian with sane-1.0.25 : threshold 0 or > 200. But the image don’t change. It’s look like the threshold option has not > effect. > > To reduce the problem, I play with the contrast and brightness option but > the result is not entirely satisfactory. > > > > I think the problem is on the threshold option of the fujitsu backends. > > > > It is probably the same bug but it don’t lokk corrected in 1.0.26 : > > https://alioth.debian.org/tracker/?group_id=30186&atid=410366&func=detail&aid=315069 > > > > Cordially. > > > -- > sane-devel mailing list: [email protected] > http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel > Unsubscribe: Send mail with subject "unsubscribe your_password" > to [email protected] -- "well, I stand up next to a mountain- and I chop it down with the edge of my hand" -- sane-devel mailing list: [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
