Dalsa Spyder2 S2-1-40 Series, Руководство пользователя

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34 Spyder2 User’s Manual
03-32-10091-04 DALSA
3.16 Setting and Reading PRNU Coefficients
You can set or read an individual pixel’s PRNU coefficient.
To set the PRNU coefficient, use the command:
Syntax:
spc i i
Syntax Elements:
i
The pixel number from
1
to the pixel count.
i
Coefficient value in a range from
0
to
511
.
Example:
spc 10 50
To read the PRNU coefficient, use the command:
Syntax:
gpc i
Syntax Elements:
i
The pixel number to read.
Example:
gpc 10
3.17 Test Patterns and End of Line Sequence
End-of-line Sequence
To alleviate post-processing, Spyder2 offers an end-of-line sequence that provides basic
calculations including "line counter", "line average", "pixels above threshold", "pixels
below threshold", and "derivative line sum". These basic calculations are the center of
most automatic gain control (AGC) algorithms.
To activate the end-of-line sequence, use the command
els 1
. To disable the end-of-line
sequence, use the command
els 0
.
Use the
sut
and
slt
commands to set threshold values between 0 and 255 for 8-bit data
modes, or 0 to 1023 for 10-bit data modes.
To further aid in debugging and cable/data path integrity, the first six bits of the output
of the end-of-line sequence are "aa", "55", "aa". Refer to the table below.
Location Value Description
1 A’s
2 5’s
3 A’s
By ensuring these values consistently toggle
between "aa" and "55", you can verify cabling
(i.e. no stuck bits)
4 4 bit counter LSB justified Counter increments by 1. Use this value to
verify that every line is output