BM-500GE / BB-500GE
39
The below calculating formula shows the relationship between the PE value used by the
camera for the different readout modes and the value entered in register 0xA018.
Due to round down figure, some errors may occur.
The relation between PE value and Time Abs.
Normal readout PE= 2 + INT (Exposure time -64) µs / (1924/60000000)
V Binning readout PE= 2 + INT (Exposure time -71.692) µs / (2524/60000000)
INT means round down.
The following table shows minimum value and maximum value for each readout mode.
Minimum value
Maximum Value
Normal Scan
64.13 us
66.442 ms
2/3 Partial Scan
64.13 us
49.736 ms
1/2 Partial Scan
64.13 us
41.495 ms
1/4 Partial Scan
64.13 us
29.117 ms
1/8 Partial Scan
64.13 us
22.960 ms
V-Binning Scan
84.13 us
43.708 ms
GPIO in combination with Pulse Width trigger
More precise exposure time can be obtained by using GPIO in combination with Pulse Width
mode. The clock generator and counter can be programmed in very fine increments.
As for the setting example, refer to chapter 6.5.1.
9.2. Pre-process functions
BM-500GE/BB-500GE has several pre-
processing functions. The output from
the camera is selectable to 8, 10 or 12-
bit but video is digitized to 14 bits
quantization.
The pre-processing functions make use
of the 14 bit video. Featured functions
are: Bayer color white balance, R/L
channel balance, gain control and LUT
(Look Up Table) for Gamma and Knee
correction.
9.2.1 Bayer White Balance ( Register
0xA0D0)
Normally, the raw Bayer color signals
are sent to the host as they are. In the
host, the signals are interpolated to
generate an RGB image and perform
white balance.
In order to offload the host, the BB-
500GE can adjust Gr, R, Gb and B levels
individually to get the white balance
for the Bayer output signal. The gain is
fixed to 1.0 for BM-500GE.
Note: Bayer white balance must be set at Normal mode.
Содержание BB-500 GE
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