mar345 Program Manual
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B. Calibration Files
Each scanner comes with 2 scanner specific calibration files. These files must reside in
directory $MARTABLEDIR and are called mar2300.XXX and mar3450.XXX, where XXX is
the three−digit serial number. The file contain flat field and geometrical corrections required
for producing Cartesian images out of a spiral scan.
− File mar2300.XXX is used for scans at pixelsizes of 0.15mm (modes 2300, 2000, 1600 and
1200) and has a typical size of 73 MB.
− File mar3450.XXX is used for scans at pixelsizes of 0.10mm (modes 3450, 3000, 2400 and
1800) and has a typical size of 103 MB.
Both files are binary files. They feature an Ascii−file header that can be looked up using
program catmar.
A typical output of command "catmar mar2300.120 " looks like this:
Format type: mar 345 ...
==============================================================
Line
At byte
Contents
==============================================================
4
(
192)
PROGRAM
improve Version 2.8
5
(
256)
DATE
Wed Feb
2 12:00:40 2000
6
(
320)
SCANNER
120
7
(
384)
PIXEL
LENGTH 75
HEIGHT 150
SUBPIXELS 25
8
(
448)
PHIOFF
269.970
9
(
512)
CUTOFF
0.000
10
(
576)
SCALE
32767.000
11
(
640)
GAIN
1.000
12
(
704)
NUMBER
PIXELS 7766361
NEIGHBOURS 25199739
13
(
768)
MODE
2300 X
0 Y 1149 ROFF
0 SKIP 144
14
(
832)
MODE
2000 X
0 Y
999 ROFF
0 SKIP 144
15
(
896)
MODE
1600 X
0 Y
800 ROFF
0 SKIP 809
16
(
960)
MODE
1200 X
0 Y
600 ROFF
0 SKIP 809
17
( 1024)
MODE
2300 PIX 7766361
POS 4096
18
( 1088)
MODE
2000 PIX 5956761
POS 17151502
19
( 1152)
MODE
1600 PIX 3845618
POS 37076767
20
( 1216)
MODE
1200 PIX 2190418
POS 52798207
==============================================================
