JAI TM-770, Руководство пользователя

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Functional Options 39
TM-77X Series
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High Sensitivity Mode
When this box is checked, the camera’s “high sensitivity” mode is enabled. This mode uses special processing
of the video signal to sum neighboring pixels and increase the level of the output signal as illumination
decreases. The camera will automatically switch to high sensitivity processing under dark conditions when the
video level from ALC drops below a minimum threshold. Using High Sensitivity Mode, the camera’s low light
sensitivity can be extended by a factor of roughly 100. On screen resolution is reduced due to the summing
process, however unlike traditional binning, the camera’s frame rate remains constant at 30 fps.
5.1.2 White Blemish Compensation (Option OP2-5)
This optional feature allows the user to control the white blemish compensation process. The camera can come
pre-calibrated with the white blemishes mapped and saved into the flash memory. Once calibrated, the camera
will then interpolate and substitute for the white pixels.
Figure 36. White Blemish Set
5.1.2.1 Blemish Threshold (%)
This feature is used to detect the white blemish pixels. The user enters the percentage above the mean to
determine the blemishes. Clicking on “Locate Blemishes” will display the number of blemishes found in the
“Blemish Count” box. If no blemishes are detected, the user can lower the threshold until it starts to detect
them.
NOTE: The total number of blemishes allowed is 64. Thus, if there are more than 64, the camera will only
correct the first 64 blemishes it detects. To reduce the number of blemishes, the user should raise the
threshold.
Once the blemishes are located, the “White Blemish Compensation” can be enabled or disabled in the main
control window. The file should be saved under the “User Set.”
5.1.2.2 Column Defect Compensation
In addition to individual blemish compensation, this camera system also allows for the correction of up to four
column defects. Enter the column number of the defect(s) in one or more of the Address boxes. Turning the
Indicator to “On” displays an on-screen marker which can be used to identify the column number of the
defective column. Once identified, the camera will compensate for the defective column when “White Blemish
Compensation” is enabled.
5.1.3 Extended Temperature Range (-45°C to +65°C) (Option OP22-5-1)
This optional feature assures that the camera will operate at this extended temperature range. If this option is
selected, each unit is individually tested, validated and temperature cycled through the temperature range.
Although the unit is guaranteed to operate throughout the temperature range, there may be some reduced
performance, such as higher noise, reduced SNR, etc.