8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 135
When horizontal Decimation by 4 and vertical Decimation by 4 are enabled, the maximum ROI width would
be 612 and the maximum ROI height would be 512.
2)
Reduced resolution
Using Decimation effectively reduces the resolution of the camera's imaging sensor. Taking MER2-502-
79U3M/C(-L) as an example, the camera's default resolution is 2448×2048. When horizontal Decimation
by 4 and vertical Decimation by 4 are enabled, the effective resolution of the sensor is reduced to 612×512.
3)
Possible image distortion
The displayed image will not be distorted if the vertical and horizontal Decimation factors are equal. When
only horizontal Decimation or vertical Decimation is used, the displayed image will be reduced in width or
height.
4)
Mutually exclusive with Binning
Decimation and Binning cannot be used simultaneously in the same direction. When the horizontal
Decimation value is set to a value other than 1, the horizontal Binning feature cannot be used. When the
vertical Decimation value is set to a value other than 1, the vertical Binning feature cannot be used.
On some camera models, user can select to perform Sensor or FPGA decimation. The difference is that
Sensor decimation may increase the camera's frame rate.
8.3.12.
Reverse X and Reverse Y
The Reverse X and Reverse Y features can mirror acquired images horizontally, vertically, or both.
Enabling Reverse X
To enable Reverse X, set the ReverseX parameter to true. The camera mirrors the image horizontally.
Figure 8-54 The original image
Figure 8-55 Reverse X enabled
Enabling Reverse Y
To enable Reverse Y, set the ReverseY parameter to true. The camera mirrors the image vertically.
