Re: [sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
Hello, I'm currently on travel. I'll look at this next week. Regards, Stef M G Berberich s...@oss.m-berberich.de a écrit : Am Mittwoch, den 04. Juni schrieb M G Berberich: Hello, Am Montag, den 02. Juni schrieb Stef: I have fixed the issue of distorted pictures in grey mode for DPI = 600 dpi. I have also fixed 600 dpi accurracy problem. All these fixes are available in SANE's git source tree, with genesys backend internal build version 2504. 600 dpi lineart and gray scans work fine now. Thanks a lot. The y-Axis seems to be streched by 0.2%. While doing a full DIN A4 scan, the carriage seems to collide at the end. You can hear this in this recording: https://m-berberich.de/sane/Scanner.ogg at 10,7 s – 11 s collision at the „bottom“ of the scan. MfG bmg -- „Des is völlig wurscht, was heut beschlos- | M G Berberich sen wird: I bin sowieso dagegn!“ | berbe...@fmi.uni-passau.de (SPD-Stadtrat Kurt Schindler; Regensburg) | www.fmi.uni-passau.de/~berberic -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject unsubscribe your_password to sane-devel-requ...@lists.alioth.debian.org -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject unsubscribe your_password to sane-devel-requ...@lists.alioth.debian.org
Re: [sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
Am Mittwoch, den 04. Juni schrieb M G Berberich: Hello, Am Montag, den 02. Juni schrieb Stef: I have fixed the issue of distorted pictures in grey mode for DPI = 600 dpi. I have also fixed 600 dpi accurracy problem. All these fixes are available in SANE's git source tree, with genesys backend internal build version 2504. 600 dpi lineart and gray scans work fine now. Thanks a lot. The y-Axis seems to be streched by 0.2%. While doing a full DIN A4 scan, the carriage seems to collide at the end. You can hear this in this recording: https://m-berberich.de/sane/Scanner.ogg at 10,7 s – 11 s collision at the „bottom“ of the scan. MfG bmg -- „Des is völlig wurscht, was heut beschlos- | M G Berberich sen wird: I bin sowieso dagegn!“ | berbe...@fmi.uni-passau.de (SPD-Stadtrat Kurt Schindler; Regensburg) | www.fmi.uni-passau.de/~berberic -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject unsubscribe your_password to sane-devel-requ...@lists.alioth.debian.org
Re: [sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
On 04/06/2014 22:48, M G Berberich wrote: Hello, Am Montag, den 02. Juni schrieb Stef: I have fixed the issue of distorted pictures in grey mode for DPI = 600 dpi. I have also fixed 600 dpi accurracy problem. All these fixes are available in SANE's git source tree, with genesys backend internal build version 2504. 600 dpi lineart and gray scans work fine now. Thanks a lot. Am Sonntag, den 11. Mai schrieb Andrew Kanaber: Am Montag, den 05. Mai schrieb Stef: M G Berberich wrote: 2400 dpi and 4800 dpi do not work at all, but never did. 2400 and 4800 dpi scans works on my LiDE 210. So I'd need some logs or better information on what is not working for you. For what it's worth I also see 2400dpi and 4800dpi working fine on my LiDE 110, and producing correct (undistorted) aspect ratio. 2400 dpi and 4800 dpi still do not work at all on my LiDE 210. MfG bmg Hello, could you send me a test case where 2400 dpi scan doesn't work as a scanimage command ? For instance something like: export SANE_DEBUG_GENESYS=255 export SANE_DEBUG_GENESYS_LOW=255 export SANE_DEBUG_GENESYS_GL124=255 scanimage -d genesys --clear-calibration --width 50.0 --height 50.0 --resolution 2400 --mode Gray 2scan.log scan.pnm changing scan parameters an color mode. Then send me the scan.log and scan.pnm files, and scan parameters son I can try to run the same in my dev environment and have a chance to reproduce it? Regards, Stef -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject unsubscribe your_password to sane-devel-requ...@lists.alioth.debian.org
Re: [sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
Hello, Am Montag, den 02. Juni schrieb Stef: I have fixed the issue of distorted pictures in grey mode for DPI = 600 dpi. I have also fixed 600 dpi accurracy problem. All these fixes are available in SANE's git source tree, with genesys backend internal build version 2504. 600 dpi lineart and gray scans work fine now. Thanks a lot. Am Sonntag, den 11. Mai schrieb Andrew Kanaber: Am Montag, den 05. Mai schrieb Stef: M G Berberich wrote: 2400 dpi and 4800 dpi do not work at all, but never did. 2400 and 4800 dpi scans works on my LiDE 210. So I'd need some logs or better information on what is not working for you. For what it's worth I also see 2400dpi and 4800dpi working fine on my LiDE 110, and producing correct (undistorted) aspect ratio. 2400 dpi and 4800 dpi still do not work at all on my LiDE 210. MfG bmg -- „Des is völlig wurscht, was heut beschlos- | M G Berberich sen wird: I bin sowieso dagegn!“ | berbe...@fmi.uni-passau.de (SPD-Stadtrat Kurt Schindler; Regensburg) | www.fmi.uni-passau.de/~berberic -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject unsubscribe your_password to sane-devel-requ...@lists.alioth.debian.org
Re: [sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
Hello, I have fixed the issue of distorted pictures in grey mode for DPI = 600 dpi. I have also fixed 600 dpi accurracy problem. All these fixes are available in SANE's git source tree, with genesys backend internal build version 2504. Regards, Stef -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject unsubscribe your_password to sane-devel-requ...@lists.alioth.debian.org
Re: [sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
Am Montag, den 05. Mai schrieb Stef: M G Berberich wrote: 2400 dpi and 4800 dpi do not work at all, but never did. 2400 and 4800 dpi scans works on my LiDE 210. So I'd need some logs or better information on what is not working for you. For what it's worth I also see 2400dpi and 4800dpi working fine on my LiDE 110, and producing correct (undistorted) aspect ratio. Andrew -- sane-devel mailing list: sane-devel@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject unsubscribe your_password to sane-devel-requ...@lists.alioth.debian.org
[sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
Hello, Am Montag, den 05. Mai schrieb Stef: On 25/04/2014 02:55, Andrew Kanaber wrote: I hit the same problem with a Canon LiDE 110. I tried measuring the distortion by scanning a sheet of graph paper in various modes. With sane 1.0.24 in 600dpi lineart and gray modes the scan is stretched vertically by about 30%. Color mode scans are actually also stretched at 600dpi, but much less noticeably by about 2%. The stretching is still visible though if you compare the scanned images side-by-side. With version 1.0.22 the lineart and gray scans are correct at 600dpi but the 2%-ish stretching is still present in 600dpi color mode. In case it helps I've put some of the scans up at http://www.chiark.greenend.org.uk/~akanaber/lide110/ Let me know if there's something else I can do that might help, Andrew M G Berberich wrote: Hello, Canon LiDE 210 with sane-backends 1.0.24 (libsane:amd64 1.0.24-1.1+b1 from debian testing) has problems with 600 dpi gray and lineart. In 600 dpi gray and lineart the scan is partial and aspect-ratio is not correct. Vertically only about ? of the area is scanned and then scaled to the area, horizontally all is fine. (So probably the driver sets the wrong scanline-skip (to small)). This worked in older versions, at least 1.0.22. 600 dpi Color-scanning works fine, so do preview, 300dpi and 1200 dpi in all modes. 2400 dpi and 4800 dpi do not work at all, but never did. MfG bmg Hello, the vertical resolution is given by the motor speed which is eventually an int. So rounding errors may give ~2% distortion: target=((exposure * dpi) / base_dpi)step_type; Maybe by decreasing or increasing slightly exposure time rounding errors could be mitigated, but changing exposure may raise other problems. If the windows driver can do it, I'll manage to find something. I'll check how the gray scan beahves. The change between 1.022 and 1.0.24 is to use the LINESEL function when we try to scan below the minimal scanning speed of the motor. This should affect scans below 600 dpi, but not 600 dpi which is the minimal scanning speed. 2400 and 4800 dpi scans works on my LiDE 210. So I'd need some logs or better information on what is not working for you. Made some logs and images. Please see http://www.m-berberich.de/sane/ Details are in Readme.txt I'm currently working on shading calibration problems for gl646 based scanners (HP2400 and HP3670). I'll look into this issues when I have finished it. If you have time for it, you can open a bug in the bug tracker (https://alioth.debian.org/tracker/?group_id=30186) and assigned it to me. Regards, Stef MfG bmg -- ?Des is v?llig wurscht, was heut beschlos- | M G Berberich sen wird: I bin sowieso dagegn!? | berberic at fmi.uni-passau.de (SPD-Stadtrat Kurt Schindler; Regensburg) | www.fmi.uni-passau.de/~berberic
[sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
On 25/04/2014 02:55, Andrew Kanaber wrote: I hit the same problem with a Canon LiDE 110. I tried measuring the distortion by scanning a sheet of graph paper in various modes. With sane 1.0.24 in 600dpi lineart and gray modes the scan is stretched vertically by about 30%. Color mode scans are actually also stretched at 600dpi, but much less noticeably by about 2%. The stretching is still visible though if you compare the scanned images side-by-side. With version 1.0.22 the lineart and gray scans are correct at 600dpi but the 2%-ish stretching is still present in 600dpi color mode. In case it helps I've put some of the scans up at http://www.chiark.greenend.org.uk/~akanaber/lide110/ Let me know if there's something else I can do that might help, Andrew M G Berberich wrote: Hello, Canon LiDE 210 with sane-backends 1.0.24 (libsane:amd64 1.0.24-1.1+b1 from debian testing) has problems with 600 dpi gray and lineart. In 600 dpi gray and lineart the scan is partial and aspect-ratio is not correct. Vertically only about ? of the area is scanned and then scaled to the area, horizontally all is fine. (So probably the driver sets the wrong scanline-skip (to small)). This worked in older versions, at least 1.0.22. 600 dpi Color-scanning works fine, so do preview, 300dpi and 1200 dpi in all modes. 2400 dpi and 4800 dpi do not work at all, but never did. MfG bmg Hello, the vertical resolution is given by the motor speed which is eventually an int. So rounding errors may give ~2% distortion: target=((exposure * dpi) / base_dpi)step_type; Maybe by decreasing or increasing slightly exposure time rounding errors could be mitigated, but changing exposure may raise other problems. If the windows driver can do it, I'll manage to find something. I'll check how the gray scan beahves. The change between 1.022 and 1.0.24 is to use the LINESEL function when we try to scan below the minimal scanning speed of the motor. This should affect scans below 600 dpi, but not 600 dpi which is the minimal scanning speed. 2400 and 4800 dpi scans works on my LiDE 210. So I'd need some logs or better information on what is not working for you. I'm currently working on shading calibration problems for gl646 based scanners (HP2400 and HP3670). I'll look into this issues when I have finished it. If you have time for it, you can open a bug in the bug tracker (https://alioth.debian.org/tracker/?group_id=30186) and assigned it to me. Regards, Stef
[sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
I hit the same problem with a Canon LiDE 110. I tried measuring the distortion by scanning a sheet of graph paper in various modes. With sane 1.0.24 in 600dpi lineart and gray modes the scan is stretched vertically by about 30%. Color mode scans are actually also stretched at 600dpi, but much less noticeably by about 2%. The stretching is still visible though if you compare the scanned images side-by-side. With version 1.0.22 the lineart and gray scans are correct at 600dpi but the 2%-ish stretching is still present in 600dpi color mode. In case it helps I've put some of the scans up at http://www.chiark.greenend.org.uk/~akanaber/lide110/ Let me know if there's something else I can do that might help, Andrew M G Berberich wrote: Hello, Canon LiDE 210 with sane-backends 1.0.24 (libsane:amd64 1.0.24-1.1+b1 from debian testing) has problems with 600 dpi gray and lineart. In 600 dpi gray and lineart the scan is partial and aspect-ratio is not correct. Vertically only about ? of the area is scanned and then scaled to the area, horizontally all is fine. (So probably the driver sets the wrong scanline-skip (to small)). This worked in older versions, at least 1.0.22. 600 dpi Color-scanning works fine, so do preview, 300dpi and 1200 dpi in all modes. 2400 dpi and 4800 dpi do not work at all, but never did. MfG bmg
[sane-devel] genesys Canon Lide 210 aspect-ratio-problem at 600 dpi
Hello, Canon LiDE 210 with sane-backends 1.0.24 (libsane:amd64 1.0.24-1.1+b1 from debian testing) has problems with 600 dpi gray and lineart. In 600 dpi gray and lineart the scan is partial and aspect-ratio is not correct. Vertically only about ? of the area is scanned and then scaled to the area, horizontally all is fine. (So probably the driver sets the wrong scanline-skip (to small)). This worked in older versions, at least 1.0.22. 600 dpi Color-scanning works fine, so do preview, 300dpi and 1200 dpi in all modes. 2400 dpi and 4800 dpi do not work at all, but never did. MfG bmg -- ?Des is v?llig wurscht, was heut beschlos- | M G Berberich sen wird: I bin sowieso dagegn!? | berberic at fmi.uni-passau.de (SPD-Stadtrat Kurt Schindler; Regensburg) | www.fmi.uni-passau.de/~berberic
