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Spyder3 SC-34 Color Camera User's Manual
03-032-20116-01
Teledyne DALSA
3.8 End-of-line Sequence
Pu rp ose:
Prod u ces an end -of-line sequ ence that p rovid es basic calcu lations inclu d ing "line
cou nter," "line su m ," "p ixels above threshold ," "p ixels below threshold ," and "d erivative
line su m " w ithin the region of interest. These calcu lations can be u sed to p erform
aoc
algorithm s or ind icate objects of interest.
To fu rther aid in d ebu gging and cable/ d ata p ath integrity, the first three p ixels after Line
Valid are "aa", "55", "aa". (Refer to the follow ing table.) These statistics are calcu lated for
the p ixels w ithin the region of interest.
Syntax:
els
i
Syntax Elem ents:
i
0
Disable end -of-line sequ ence
3
LVAL extend ed by 16 (stat) p ixels
7
LVAL shifted by 16 p ixels to encom p ass stat p ixels
N otes:
LVAL is high d u ring the end -of-line statistics.
Exam p le:
els 1
Table 14: End-of-Line Sequence Description
Location Value
Description
1
A‘s
By ensu ring these valu es consistently toggle betw een "aa" and "55",
you can verify cabling (i.e. no stu ck bits)
2
5‘s
3
A‘s
4
4 bit cou nter LSB ju stified
Cou nter increm ents by 1. Use this valu e to verify that every line is
ou tp u t
5
Line sum (7…0)
Use these valu es to help calcu late line average and gain
6
Line sum (15…8)
7
Line sum (23…16)
8
Line sum (31…24)
9
Pixels above threshold (7…0)
Monitor these valu es (either above or below threshold ) and ad ju st
cam era d igital gain and backgrou nd su btract to m axim ize scene
contrast. This p rovid es a basis for au tom atic gain control (AGC)
10
Pixels above threshold
(15…8)
11
Pixels below threshold (7…0)
12
Pixels below threshold (15…8)
13
Differential line su m (7..0)
Use these valu es to focu s the cam era. Generally, the greater the
su m the greater the im age contrast and better the focu s.
14
Differential line sum (15…8)
15
Differential line su m (23…16)
16
Differential line sum (31…24)
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