GX3300 Technical Manual
Page 36
DefectMask
This feature is only available on the GE4000 and GE4900 cameras. The standard model of these cameras use Class 2 sensors which can
have column defects. The DefectMask replaces defective columns with interpolated values based on neighboring columns. Class 1 and
Class 0 sensors are available for these cameras which do not require any column masking.
DefectMaskColumnEnable - The defect mask can be set to On or Off.
Exposure
Auto
This group of controls relates to the camera auto-exposure function.
NOTE: The camera must be acquiring images in order for the auto exposure algorithm to update.
ExposureAutoAdjustDelay
–
Currently unimplemented.
ExposureAutoAdjustTol
–
In percent. A threshold. Sets a range in variation from ExposureAutoTarget in which the
autoexposure algorithm will not respond. Can be used to limit exposure setting changes to only larger variations in scene
lighting.
ExposureAutoAlg
–
The following algorithms can be used to calculate auto-exposure:
Mean
–
The arithmetic mean of the histogram of the current image is compared to ExposureAutoTarget, and the next
image adjusted in exposure time to meet this target. Bright areas are allowed to saturate.
FitRange
–
The histogram of the current image is measured, and the exposure time of the next image is adjusted so
bright areas are not saturated. Generally, the Mean setting is preferred.
ExposureAutoMax
–
In microseconds. This sets the upper bound to the exposure setting in autoexposure mode. This is useful
in situations where frame rate is important. This value would normally be set to something less than 1x10^6/(desired frame
rate).
ExposureAutoMin
- In microseconds. This sets the lower bound to the exposure setting in autoexposure mode.
ExposureAutoOutliers
–
In percent. The percentage of image pixels that do not have to fit into the proper exposure range.
ExposureAutoRate
–
In percent. Determines the rate at which the autoexposure function changes the exposure setting.
ExposureAutoTarget
–
In percent. Controls the general lightness or darkness of the auto exposure feature; specifically the
target mean histogram level of the image, 0 being black, 100 being white.
ExposureMode
Manual - The camera exposure time is fixed by ExposureValue parameter.
Auto - The exposure time will vary continuously according to the scene illumination. The Auto exposure function operates
according to the Auto and DSP controls
AutoOnce - The exposure will be set once according to the scene illumination and then remain at that setting even when the
scene illumination changes. The AutoOnce exposure function operates according to the Auto and DSP controls
External - When ExposureMode is set to External the exposure time will be controlled by an external signal appearing on
SyncIn1 or SyncIn2. In order for this feature to work, the parameter FrameStartTriggerMode must be set to SyncIn1 or
SyncIn2. This feature is supported in version 1.36 firmware and above. It is not available on any of the CMOS-based cameras.
ExposureValue
–
In microseconds. The sensor integration time. 15000 corresponds to 15 ms integration time, 1000 corresponds to
1ms, etc.
