JAI EN Series Cameras TS(C)-4032EN - Manual (Page 43)

Camera Features 43
EN Camera Series
Shadow factor is used to calculate the contrast of the Light Sensor A Side to the B Side of the light
sensor. Based on this Shadow Factor, the camera’s ADR logic optimizes the camera parameters
(exposure time, gain, vtop, vbot, pedestal). Please do not change this value and keep the factory
default (See EN to LC Interface Document for the factory default).
• ADR Shutter Max
Based on the light sensor reading, the camera’s ADR (Automatic Dynamic Range Control) optimizes
the exposure time of the camera, and this setting is the upper limit of the exposure time range.
Normally, a monochrome camera is set to 500 usec, as the FlashHead strobes the light only for 500
usec. A color camera can hold a longer exposure time, but keep in mind that the motion blur is
severe if the “ADR Shutter Max” is longer than 1 msec. Increase “ADR Shutter Max” if the night
image is too dark and you can accept more motion blur.
• ADR Shutter Min
Minimum or shortest exposure time that the camera ADR control will adjust to. Keep this to the
factory default (See EN to LC Interface Document for the factory default).
• ADR Debug Side A
This value is read-only when “Camera ADR Control” is set to “ADR Control (using Light Sensor)”.
ENSetup software displays the raw reading of the light sensor A Side value. If “Camera ADR Control”
is set to “Debug” mode, you can write an A Side value to simulate the camera ADR. See “Camera
ADR Control”.
• ADR Debug Side B
See “ADR Debug Side A”. This is for Light Sensor Side B.
• ADR White-to-Blue Ratio
“ADR White to Blue Ratio” is the ratio between a white plate and blue plate, and is used to optimize
the camera parameters. This value is optimized by JAI, and should be kept at factory default.
Please do not change it.
• Camera Shutter Mode
This is read-only status. Current setting of camera exposure time (dial). To find out Dial vs exposure
time (us) relationship, please see Operational Manual.
• Camera Gain
This is read-only status. Current setting of camera gain.
• Camera Vtop
This is read-only status. Current setting of camera ADC Vtop setting. Normally, Vtop is kept to 255.
The value is lowered only if the system needs extra gain in night time (Only 9720EN).
• Camera Vbot
This is read-only status. Current setting of camera ADC Vbot setting. Vbot is kept to 0 at night time.
The camera’s ADR logic raises Vbot in sunny daytime to increase the contrast of the license plate.
6.3.2 Electronic Shutter
Normally, exposure time is controlled automatically by ADR (Automatic Dynamic Range) control
algorithm inside the EN, based on the output from light sensor. However during nighttime
installations it is often convenient to manually adjust the shutter time to a larger value so that the
focusing targets and vehicle used for setup are easily seen with the available road lighting. Manually
adjusting shutter speed can also be useful for certain types of debugging (See Section 7.2, “Problem
2: EN Setup Software Found the Camera, But the Video Image is Too Dark or Just Black,” on page
47).
The following exposure times are supported