Opmerkingen/Notes TECO Relisys Scorpio Super 3 scanner (SCSI) VM3575

Main Index, teco2, VM356A, ICC profile
#Scanner Info, #Testreport

Scanner Info

• Label Relisys Scorpio Super 3 Model: VM3575
  Black backing sheet
  CCD module
  Scan format 8.5" by 11.7" (216 by 296 mm) (A4 size)
  At y-axis 0 in the middle of the x-axis a little mirror(silver paper) placed in the backing sheet, used for?
  Picture mirror: vm3575-mirror.jpg
  
  Interface SCSI
  Memory buffer 8 kByte
  Optical Resolution 300 by 600 dpi
  Win. software color (1-9600) + fixed values
  (50,72,100,120,150,180,200,240,300,360,400,600,720,800,1200,1600,2400,4800,9600)
  Image Data Color: 30 bits per pixel
  Image Data grey : 10 bits per pixel, red, green or blue filter selectable
  Image Data bi-tone: 1 bit per pixel, red, green or blue filter selectable
  Voor bi-tone mode 8 dither modes selectable
  
  Difference with the Relisys AVEC Super 3: ?
  Rebadged VM3575:
  Mustek ScanMagic 4830S
  Mustek ScanMagic info
  Return/Terug Top
  

Testreport

• System info: Linux, Debian (Woody), kernel 2.4.12-K6
  SCSI Interface Card DTC 16D32 for scanner and INITIO for CD-R/RW
  cat /proc/scsi/scsi
  Attached devices:
  Host: scsi0 Channel: 00 Id: 04 Lun: 00
  Vendor: PHILIPS Model: CDD3600 CD-R/RW Rev: 2.00 Type: CD-ROM ANSI SCSI revision: 02
  Host: scsi1 Channel: 00 Id: 06 Lun: 00
  Vendor: Model: Flatbed Scanner Rev: 1.03 Type: Scanner ANSI SCSI revision: 02
  
  
• 11-11-2001 Test performed with Sane 1.0.4 and the Artec and Mustek backend, to get some information on the scanner.
  1. mustek backend test with teco scanner mustek-teco-debug.txt
  2. artec backend test with teco scanner artec-teco-debug.txt
  
  
• 12-11-2001 Start with downloading source SANE backend 1.0.5 and diffs 1.0.5-2/3
  
  
• 02-12-2001 Start with downloading source SANE backend 1.0.6 and diffs 1.0.6-1
  
  
• 13-03-2002 Start with downloading source SANE backend 1.0.7, diffs 1.0.7-2 and sane-teco diffs (goal is to get a compiled version from the TECO backend sources [1]).
  
  
• 14-03-2002 Compiled version and installation TECO backend succeeded, backend is for the VM3530+, for the VM3575 model different things has to be added or changed. Such as Inquiry string for model type etc.
  1. test 1 teco backend teco-debug.txt
  
  
• 21-03-2001 first scsi trace (on testsystem) initio scsi card, 256 color, 100 dpi
  1. Scsi Trace wnaspi32-01.txt
  
  
• 22-03-2002 test with version 1.0-1 teco2 from Frank [1] and sane 1.0.7 with patch -0.2.diff (debian)
  1. test 1 teco2 backend teco2-debug-01.txt
  
  
• 22-03-2002 test 2 with version 1.0-1 teco2 and update teco2.c and teco2.h from Frank and sane 1.0.7 with patch -0.3.diff (debian) calibration seems to be OK, teco-sense gamma seems to be OK, After teco-send-vendero-06: enter After that system crash, keyboard and mouse dead.(xwindows), reset button. result no logfile, crash command CDB 000: 06 00 00 00 00 00 second time also problems export SANE_DEBUG_TECO2=128 xscanimage teco2 program started, some options adjustable, scanning started, SCSI ID scanner is 06 After teco-send-vendor-06:enter CDB 000: 06 00 00 00 00 00 keyboard, mouse dead, power on/off needed.
  
  
• 23-03-2002 test 3 with version 1.0-1 teco2 and update teco2.c and teco2.h [1] and sane 1.0.7 with patch -0.3.diff (debian)
  First scans made (export SANE_DEBUG_TECO2=128, xscanimage teco2): Scans in pnm format converted with gimp to jpg (reduce file format), black and white not converted (problem in gimp)
  1a. black and white 100 dpi A4 format bw100d.pnm
  1b. part of the logfile bw scan, 848x1169 121.0 kB according xscanimage, only 15.2 kB is scanned. black and white 100 dpi A4 format teco2-debug-02.txt
  2. grayscale 100 dpi A4 format gr100d.jpg
  3. color 100 dpi A4 format co100d.jpg
  Problems so far:
  1. A few times xscanimage closed SCSI 1 interface not correct, reboot needed to find /dev/scanner again no idee yet to find the cause (preview option problem or ?).
  2. black and white scans NOK
  3. grayscale scan, 2 vertical lines in scan
  4. colorscale scan, 2 vertical lines in scan, and 3x scan on file (color mix?)
  So a lot of progress is made.
  Also xsane used for testing teco2 backend, preview mode causes a system crash, reason?.
  
  
• 24-03-2002 test 4 with version 1.0-1 teco2 and update teco2.c and teco2.h [1], sane 1.0.7 with patch -0.3.diff(debian), xsane 0.78.
  export SANE_DEBUG_TECO2, xsane teco2a, color reference chart [16], HP 970 cxi printer
  1. black and white 100 dpi A4 format, normal paper used, printed with printtool bw100d-1.jpg.
  2. grayscale 100 dpi A4 format, normal paper used gr100d-1.jpg
  3a. color 100 dpi A4 format, normal paper used co100d-1.jpg
  3b. color 100 dpi A4 format co100d-1b.jpg
  Problems so far:
  1. 2 vertical lines in all 3 scans
  2. preview mode test sequence start with xsane, made some scans OK, made some preview scans OK, from preview mode to normal mode, scsi problems, sane-find-scanner no response of scanner, if this problem is related to the snapscan problems with the segfault in sane-exit (discussion in SANE mailinglist) ?
  3. First color test, color reference chart [16] printed on plain paper (co100d-1.jpg) instead of photopaper so scan result can be better, second color test, color reference chart [16] printed on photo paper (co100d-1b.jpg
  4. Installed linux printer driver for HP970Cxi is not optimal yet, so output color reference chart (co100d-1.jpg) NOK yet, for second color scan (co100d-1.jpg) cupsys installed and qtcups used for printing
  5. On color scan not all colors are correct, 3 lines instead of 1 (no calibration in teco2 driver yet) See for example difference yellow color on ref. chart and scan (604CVU)
  
  
• 25-03-2002 test 1 with version date 24032002 teco2 [1], sane 1.0.7 with patch -0.3.diff(debian), xsane 0.78.
  export SANE_DEBUG_TECO2, xsane 2>log-2.txt teco2:/dev/scanner, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  1. black and white 100 dpi A4 format, normal paper bw100-2.jpg
  2. grayscale 100 dpi A4 format, photo paper gr100d-2.jpg
  3. color 100 dpi A4 format, photo paper co100d-2.jpg
  4. logfile from all 3 scans log-2.txt
  Report:
  1. 2 vertical lines in all 3 scans
  2. preview mode not tested
  3. bw scan looks better
  4. gr scan looks better on some points so calibration helps, but it seems there is a mixup between gray from yellow and gray of blue.
  5. co scan, old problem with 3 images on one sheet is back again, white background is now yellow, instead of hor. lines, 3 colors now the vertical lines have 3 color lines.
  
  
• 26-03-2002 test 2 with version date 24032002 teco2 [1] and update teco2.c, sane 1.0.7 with patch -0.3.diff(debian), xsane 0.78.
  export SANE_DEBUG_TECO2, xsane 2>log-x.txt teco2:/dev/scanner, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  1a. black and white 100 dpi A4 format, normal paper bw100-3.jpg
  1b. grayscale 100 dpi A4 format, normal paper gr100d-3a.jpg
  2. grayscale 100 dpi A4 format, photo paper gr100d-3b.jpg
  3. color 100 dpi A4 format, photo paper co100d-3.jpg
  4. color 100 dpi 1/2 width A4 format, normal paper co100dhw-3.jpg
  5. logfile from all 5 scans log-3.txt
  Report:
  1. For log file sequence scans: bw100d-3.jpg, gr100d-3a.jpg, co100d-3.jpg, gr100d-3b.jpg and last co100dhw-3.jpg
  2. problem with color scan 3 images in one sheet solved, problem hor. and vert. lines different lines solved 3. 2 vertical lines in all 3 scans
  4. preview mode not tested
  5. gray problems (gray level blue, yellow), color problems
  6. test with uncomment hexdump not yet done.
  
  
• 27-03-2002 test 3 with version date 24032002 teco2 [1] and update teco2.c, sane 1.0.7 with patch -0.3.diff(debian), xsane 0.78.
  export SANE_DEBUG_TECO2, xsane 2>log-x.txt teco2:/dev/scanner, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  1. color 100 dpi A4 format, photo paper co100dhex.jpg
  2. color 100 dpi 1/2 width A4 format, normal paper co100dhwhex.jpg
  3. logfile scan with "hexdump enabled"log4a.txt.gz
  4. logfile scan with "hexdump enabled"log4b.txt.gz
  Report:
  1. Test with uncomment hexdump in source file.
  
  
• 28-03-2002 test 4 with version date 24032002 teco2 [1] and update teco2.c, teco2.h, sane 1.0.7 with patch -0.3.diff(debian), xsane 0.78.
  export SANE_DEBUG_TECO2, xsane 2>log-x.txt teco2:/dev/scanner, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  1. color 100 dpi A4 format, photo paper co100d120.jpg
  logfile scan with COLOR_R 1, COLOR_G 2, COLOR_B 0 log120.txt.gz
  Report:
  1. First van six color tests, at least 5 other tests needed, this one not the correct one.
  
  
• 29-03-2002 test 4 with version date 24032002 teco2 [1] and update teco2.c, teco2.h, sane 1.0.7 with patch -0.3.diff(debian), xsane 0.78.
  export SANE_DEBUG_TECO2, xsane 2>log-x.txt teco2:/dev/scanner, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  2. color 100 dpi A4 format, photo paper co100d102.jpg
  logfile scan with COLOR_R 1, COLOR_G 0, COLOR_B 2 log102.txt.gz
  3. color 100 dpi A4 format, photo paper co100do12.jpg
  logfile scan with COLOR_R 0, COLOR_G 1, COLOR_B 2 log012.txt.gz
  4. color 100 dpi A4 format, photo paper co100d021.jpg
  logfile scan with COLOR_R 0, COLOR_G 2, COLOR_B 1 log021.txt.gz
  5. color 100 dpi A4 format, photo paper co100d201.jpg
  logfile scan with COLOR_R 2, COLOR_G 0, COLOR_B 1 log201.txt.gz
  6. color 100 dpi A4 format, photo paper co100d210.jpg
  logfile scan with COLOR_R 2, COLOR_G 1, COLOR_B 0 log210.txt.gz
  Report:
  1. The last scan is the correct one, see jpg file, COLOR_R 2, COLOR_G 1, COLOR_B 0
  
  Gray test
  1. grayscale 100 dpi A4 format, photo paper gr100d-0004.jpg
  logfile scan with COLOR_R 1, COLOR_G 2, COLOR_B 0 in grayscale mode log-0004.txt.gz
  Report:
  1. Seems there is a different in color scan and gray scan, with gray scan, blue looks like yellow (white).
  
  Updated teco2.c (with calibration update) Calibration test
  1a. Color 100 dpi A4 format, photo paper co100d-cal0000.jpg
  logfile cal scan with mode 0 log-cal0.txt.gz
  1b. Color 100 dpi A4 format, photo paper co100d-cal0001.jpg
  logfile cal scan with mode 1 log-cal1.txt.gz
  Report:
  1. Calibration 1 is the best.
  
  Gray test 2
  1. grayscale 100 dpi A4 format, photo paper co100d-gr0001.jpg
  logfile scan with COLOR_R 1, COLOR_G 2, COLOR_B 0 in grayscale mode log-gr1.txt.gz
  
  
• 31-03-2002 test 1 with version date 30032002 teco2 [1], sane 1.0.7 with patch -0.3.diff(debian), xsane 0.78.
  export SANE_DEBUG_TECO2, xsane 2>log-x.txt teco2:/dev/scanner, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  Gray test
  1. grayscale 100 dpi A4 format, photo paper gr100d-green0001.jpg
  logfile scan with color filter on green log3103-green01.txt.gz
  2. grayscale 100 dpi A4 format, photo paper gr100d-redoo01.jpg
  logfile scan with color filter on red log3103-red01.txt.gz
  3. grayscale 100 dpi A4 format, photo paper gr100d-blue0001.jpg
  logfile scan with color filter on blue log3103-blue01.txt.gz
  Report:
  1. A scan with color filter on succeded, with this color reference chart, it looks like red is the best choice, then green, blue gives a poor result.
  
  Gamma test
  1. color 100 dpi A4 format, photo paper co100d-gamma-off.jpg
  logfile scan with color filter on green log3103-gammaoff.txt.gz
  2. color 100 dpi A4 format, photo paper co100d-gamma-on.jpg
  logfile scan with color filter on green log3103-gammaon.txt.gz
  Report:
  1. Gamma test, differenc off/on?
  
  300 DPI test color, gamma off test
  1. color 300 dpi A4 format, photo paper co300d-gamma-off.jpg
  logfile scan with color filter on green log3103-300dpi.txt.gz
  Report:
  1. Color skewing on horizontal lines.
  
  600 DPI test color, gamma off test, left upper corner
  1. color 600 dpi A4 format, photo paper co600-gamma-off.jpg
  logfile scan with color filter on green log3103-600d.txt.gz
  Report:
  1. Color skewing on horizontal lines.
  
  Black and white test with color filter options test
  1. black and white 100 dpi A4 format, photo paper bw100d-green.jpg
  logfile scan with color filter on green log3103-green02.txt.gz
  2. black and white 100 dpi A4 format, photo paper bw100d-red.jpg
  logfile scan with color filter on red log3103-red02.txt.gz
  3. black and white 100 dpi A4 format, photo paper bw100d-blue.jpg
  logfile scan with color filter on blue log3103-blue02.txt.gz
  Report:
  1. The scan with the red filter is somewhat different compared to the green and blue filter?.
  
  Preview testreport:
  1. Startup xsane, startup preview scan (preview screen), scan is done, start scan (xsane screen), startup scanner, after some time xsane stops, scan not done. scsi1 interface is blokked. Powerup PC and scanner solves the problem. It seems that a exit from xsane preview mode to xsane start mode generates a hangup on the scanner interface. I have made 3 logfiles, in log3103-preview2.txt.gz xsane stopped. logfile scan with preview log3103-previewtest.txt.gz
  logfile scan with preview log3103-previewtest1.txt.gz
  logfile scan with preview log3103-previewtest2.txt.gz
  logfile syslog scsi card scsi-preview.txt
  
  
• 02-04-2002 test 2 with version date 30032002 teco2 [1], sane 1.0.7 with patch -0.3.diff(debian), xsane 0.78.
  export SANE_DEBUG_TECO2=128, xsane 2>log-x.txt teco2:/dev/scanner, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  Scanner test with update from some debian files (apt-get upgrade)
  Some test done, for color, gray, bw problems with scsi interface, see logfile, reason of problems?
  logfile scan with color mode log02042002.txt.gz
  
  
• 03-04-2002 test 1 with version date 30032002 teco2 [1] and update 2nd teco2.c, sane 1.0.7 with patch -0.3.diff(debian), xsane 0.78.
  export SANE_DEBUG_TECO2=128, xsane 2>log-x.txt teco2:/dev/scanner, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  1. color 100 dpi A4 format, photo paper co100d-03042002.jpg
  2. grayscale 100 dpi A4 format, photo paper gr100d-03042002.jpg
  logfile scan grayscale loggr03042002.txt.gz
  3. bw 100 dpi A4 format, photo paper bw100d-03042002.jpg
  
  Report:
  1. No scsi interface problems detected, a few more tests are needed but patch seems to solve the problem. Not all different options/combinations are used/checked?
  
  
• 05-04-2002 test 1 with version date 04042002 teco2 [1], sane 1.0.7 with patch -0.3.diff(debian), xscanimage 1.0.7.
  export SANE_DEBUG_TECO2=128, xscanimage 2>log-x.txt teco2:/dev/scanner, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  1. color 100 dpi A4 format, photo paper xscan-co100dpi-gammaoff.jpg
  logfile scan gamma off (default gamma value=1) xscan-co100d-gammaoff.txt.gz
  2. color 100 dpi A4 format, photo paper xscan-co100dpi-gammaon2.jpg
  logfile scan gamma on (default gamma value=2 for red, blue and green) xscan-co100d-gammaon2.txt.gz
  
  Report:
  1. No scsi interface problems detected.
  2. Result gamma test ?
  
  
• 11-05-2002 system update kernel 2.4.18-k6, test 1 with version date 04042002 teco2 [1], patch teco2.c and teco2.h date 09042002, sane 1.0.7 with patch 1.0.7-.3.2.diff(debian), xscane 0.84, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  xscane teco2:/dev/scanner
  
  Report:
  1. Only color mode 100 dpi tested, no problems
  
  
• 24-05-2002 system update kernel 2.4.18-k6, test 1 with version date 04042002 teco2 [1], patch teco2.c and teco2.h date 14052002, sane 1.0.7 with patch 1.0.7-.3.2.diff(debian),xscanimage version 1.0.7, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  export SANE_DEBUG_TECO2=128, xscanimage 2>log-x.txt teco2:/dev/scanner
  
  Report:
  1. Patch solved the problem of the topline, bottom line also OK
  color 100 dpi A4 format, photo paper xscan-co100dpi-toplines1.jpg
  logfile color scan for fixed toplines, bottom lines log24052002.txt.gz
  
  
• 25-05-2002 system update kernel 2.4.18-k6, test 1 with version date 04042002 teco2 [1], patch teco2.c and teco2.h date 14052002, sane 1.0.7 with patch 1.0.7-.3.2.diff(debian),xscanimage version 1.0.7, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  xscanimage teco2:/dev/scanner
  
  Report:
  1. Color test with different dpi values and different color_shift value in teco2.c
  color_shift=7, color 180 dpi A4 format, photo paper co-180dpi.png
  color_shift=7, color 150 dpi A4 format, photo paper co-150dpi.png
  more tests needed to get correct color_shift values.
  
  
• 26-05-2002.. 12-06-2002 system update kernel 2.4.18-k6, test 1 with version date 04042002 teco2 [1], patch teco2.c and teco2.h date 14052002, sane 1.0.7 with patch 1.0.7-.3.2.diff(debian),xscanimage version 1.0.7, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  xscanimage teco2:/dev/scanner
  
  Report:
  1. Color test with different dpi values and different color_shift value in teco2.c
  color_shift=0, color 50 dpi A4 format, photo paper co-50dpi-0.png
  color_shift=0, color 60 dpi A4 format, photo paper co-60dpi-0.png
  color_shift=0, color 75 dpi A4 format, photo paper co-75dpi-0.png
  color_shift=0, color 150 dpi A4 format, photo paper co-150dpi-0.png
  color_shift=0, color 180 dpi A4 format, photo paper co-180dpi-0.png
  color_shift=0, color 200 dpi A4 format, photo paper co-200dpi-0.png
  color_shift=0, color 240 dpi A4 format, photo paper co-240dpi-0.png
  color_shift=0, color 300 dpi A4 format, photo paper co-300dpi-0.png
  
  color_shift=3, color 50 dpi A4 format, photo paper co-50dpi-3.png
  color_shift=3, color 60 dpi A4 format, photo paper co-60dpi-3.png
  color_shift=3, color 75 dpi A4 format, photo paper co-75dpi-3.png
  color_shift=3, color 150 dpi A4 format, photo paper co-150dpi-3.png
  color_shift=3, color 180 dpi A4 format, photo paper co-180dpi-3.png
  color_shift=3, color 200 dpi A4 format, photo paper co-200dpi-3.png
  color_shift=3, color 240 dpi A4 format, photo paper co-240dpi-3.png
  color_shift=3, color 300 dpi A4 format, photo paper co-300dpi-3.png
  
  color_shift=7, color 50 dpi A4 format, photo paper co-50dpi-7.png
  color_shift=7, color 60 dpi A4 format, photo paper co-60dpi-7.png
  color_shift=7, color 75 dpi A4 format, photo paper co-75dpi-7.png
  color_shift=7, color 150 dpi A4 format, photo paper co-150dpi-7.png
  color_shift=7, color 180 dpi A4 format, photo paper co-180dpi-7.png
  color_shift=7, color 200 dpi A4 format, photo paper co-200dpi-7.png
  color_shift=7, color 240 dpi A4 format, photo paper co-240dpi-7.png
  color_shift=7, color 300 dpi A4 format, photo paper co-300dpi-7.png
  
  For the color scans use the following dpi values and corresponding color_shift values:
  dpi= 60 color_shift=2
  color_shift=2, color 60 dpi A4 format, photo paper co-60dpi-a4-2.png
  dpi=100 color_shift=3, is on this moment default value in teco2.c (14-05-2002 version)
  color_shift=3, color 100 dpi A4 format, photo paper xscan-co100dpi-toplines1.jpg
  
  patch file for teco2.c (14-05-2002) to get a correct color_shift value if scanner resolution is set to 60 or 100 dpi. patch-teco2-14052002.diff
  More tests needed to get correct color_shift valuesr, so far 31-05-2002 color_shift 0 until 9 tested.
  
  
• 13-06-2002 system update kernel 2.4.18-k6, test 1 with version date 31052002 teco2 [1], patch-teco2.14052002.diff for color_shift 2 (60dpi), 3 (100dpi), sane 1.0.8, xscanimage version 1.0.8, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  xscanimage teco2:/dev/scanner
  
  Report:
  1. Color test with different dpi values and different color_shift value in teco2.c
  
  
• 14-06-2002.. 28-08-2002 system update kernel 2.4.18-k6, test 1 with version date 31052002 teco2 [1],version 22082002 teco2.c, teco2.h and version 07082002 teco2.conf, sane 1.0.8, xscanimage version 1.0.8, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  xscanimage teco2:/dev/scanner
  
  Report:
  1. Color test with different dpi values and different color_shift value in teco2.c, 60 and 100 dpi scan OK
  2. Color order for 50, 75, 120, 150, 225 and 300 patched and now OK.
  3. Color shift for 50, 75, 120, 150, 225 and 300 OK only problem with top en bottom lines.
  color 150 dpi A4 format, photo paper (compressed with 75% gimp 1.2) out11-co150.jpg
  
  color 300 dpi A4 format, photo paper (compressed with 75% gimp 1.2) out11-co300.jpg
  
  diff file. diff27072002.txt
  
  
  
• 31-08-2002.. 02-09-2002 system update kernel 2.4.18-k6, test 1 with version date 29082002 teco2 [1],
  sane 1.0.8, xscanimage version 1.0.8, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  xscanimage teco2:/dev/scanner
  
  Report:
  Testreport document Testreport 1 teco2 backend and Relisys Scorpio Super 3 scanner version
  color 75 dpi A4 format, photo paper cirkel testfile-co75-cirkel.jpg
  
  
  
• 06-09-2002.. 0x-09-2002 test 1 with version date 29082002 teco2 [1] and update teco2.c and teco2.h date 05092002
  
  Report:
  Testreport document Testreport 2 teco2 backend and Relisys Scorpio Super 3 scanner version
  
  
• 14-09-2002 test 2 with version date 29082002 teco2 [1] and update teco2.c and teco2.h date 05092002
  sane 1.0.8, xscanimage version 1.0.8, color reference chart [16], HP 970 cxi printer, qtcups printerdriver
  xscanimage teco2:/dev/scanner
  
  Report:
  Gamma test 1.:
  1. red, red line on 1st quarter /, next 3 quarters horizontal, result background scan blue.
  2. green, green line on 1st quarter /, next 3 quarters horizontal, result background scan magneta.
  3. blue, blue line on 1st quarter /, next 3 quarters horizonal, result background scan yellow.
  Gamma test 2. : 1. red, red line on 1st quarter --, next 3 quarters /, result background scan normal
  when 1st, 2nd quarter -- and then next 2 /, result image gets more blue.
  2. green, green line on 1st quarter --, next 3 quarters /, result background scan magneta.
  3. blue ,blue line on 1st quarter --, next 3 quarter /, result background scan yellow.
  
  
• 22-09-2002 test 3 with version date 29082002 teco2 [1] and update teco2.c and teco2.h date 05092002
  sane 1.0.8, xscanimage version 1.0.8, color reference chart IT 8.7/2-1993 2001:12 info IT 8.7/2 calibration target 100dpi, gamma 1, no correction used.
  xscanimage teco2:/dev/scanner
  
  Report:
  Scan from reference chart test2-it872.png
  
  Logfile from 100 dpi scan test2-it872.txt.gz
  
  
• 05-10-2002 Test sane-backend and sane-frontend 1.0.9-pre1, only teco1, 2 and 3 compiled.
  
  Report: Some tests done with the teco2 backend.
  
  
• 06-10-2002 Some 16 bit SCSI traces VM3575 asvm3575-1.txt.gz
  
• 20-10-2002 Test sane-backend and sane-frontend 1.0.9-pre2
  Report: Some tests done with the teco2 backend.
  
  
• 14-01-2003 Test sane-backend with calibration patch from Alex Wulms:
  994c994
  < tmp_buf[j] = ( 4206639 * dev->def->cal_lines ) / tmp_buf[j];
  ---
  > tmp_buf[j] = 0x1000 - (tmp_buf[j] / dev->def->cal_lines);
  The scan turns out to be better.
  
• 31-01-2003 Some test done with version 1.0.10-pre3. When instead of 0x1000 0x1100 is used also white fields are more white.
  
• 25-04-2003 Some test done with the CVS version 25042003, use export SANE_TECO2_CAL_ALGO=0 (uses 0x1100) and export SANE_TECO2_CAL_ALGO=1 (uses 4206639 patch).
  
• 05-06-2003 Some test done with Sane 1.0.12, teco2 and 600 dpi, color skewing not OK, see files (2.7 Mbyte) color 600 dpi file in raw mode
  color 600 dpi file with line 1 0 2 0 0
  
• 09-06-2003 Some test done with Sane 1.0.12, teco2
  Due to a bug the around line 2740 the following change is made:
  dev->def->color_adjust[i].resolution != dev->x_resolution;
  should be
  dev->def->color_adjust[i].resolution != dev->y_resolution;
  Also done some tests for the VM3575 color table, for result see table below:
  {50, 2, 0, 1, 1, 1},
  {60, 2, 1, 0, 0, 2},
  /* {75, 2, 0, 1, 1, 2}, NOK, effects in scan, also with twain driver*/
  {100, 2, 1, 0, 0, 3},
  {120, 2, 0, 1, 1, 3},
  {150, 2, 0, 1, 1, 4},
  /*{180, 2, 1, 0, 0, 4}, NOK, skewing problem*/
  {225, 2, 0, 1, 1, 6},
  {300, 2, 0, 1, 1, 8},
  {375, 2, 0, 1, 1, 10}, /* ok, but wrong y proportion */
  {450, 2, 0, 1, 1, 12}, /* ok, but wrong y proportion */
  {525, 2, 0, 1, 1, 14}, /* ok, but wrong y proportion */
  {600, 2, 0, 1, 1, 16}, /* ok, but wrong y proportion */
  

• 20-06-2003 updates files (not yet in cvs) teco2.h -white_level added
  updates file teco2.c -custom gamma disabled for VM3564 and VM356A, no gamma function for these scanners
  -SANE_TECO2_CAL_ALGO values added for 0 and 1 mode for VM3564 and VM356A, default is 1
  -white_level added for VM3564, VM356A and VM3575 (SANE_TECO2_CAL_ALGO mode 0 and 1)
  -color dpi tables update, correct 600dpi color scan for the VM356A and VM3575 possible (only scaling problem left)
  -values for the VM3564 not tested
  teco2-20062003.h
  teco2-20062003.c
  teco2-20062003.conf

• 21-06-2003 updates teco2.c file (some text color table, files not yet in cvs)
  teco2-21062003.c

• 25-06-2003 updates teco2.c and teco2.conf file (update some text table and name scanner selection added used in frontend for example xsane and quiteinsane, files not yet in cvs)
  teco2-25062003.c
  teco2-25062003.conf

• 20-07-2003 updates teco2.c, teco2.h and teco2.conf are placed in CVS.
  
  
• 15-01-2004 For info updates etc. see teco2 page
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