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ar345 Program Manual 4 0
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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 require
d
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 an
d
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 an
d
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 usin
g
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
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