8.Features
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 125
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Height
OffsetY
OffsetX
Width
ROI
Column
Figure 8-25 ROI
When reducing the height of the ROI, the maximum frame rate of the camera will be raised. Please refer
to
for specific effects on the acquisition frame rate.
When setting the ROI of the image, the device should stop acquisition.
8.3.4. Auto Exposure/Auto Gain
8.3.4.1. ROI Setting of Auto Exposure/Auto Gain
For Auto Exposure and Auto Gain, you can specify a portion of the sensor array and only the pixel data
from the specified portion will be used for auto function control.
AAROI is defined by the following way:
AAROIOffsetX: The offset of the X axis direction.
AAROIOffsetY: The offset of the Y axis direction.
AAROIWidth: The width of ROI.
AAROIHeight: The height of ROI.
Offset is the offset value that relative to the upper left corner of the image. The step of AAROIOffsetX and
AAROIWidth is 4. The step of AAROIOffsetY and AAROIHeight is 2. The setting of the AAROI depends on
the size of the current image and cannot exceed the range of the current image. That is to say, assuming
the Width and Height are parameters for users captured image, then the AAROI setting need to meet the
condition 1:
AARO AAROIOffsetX ≤ Width
