8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 95
Horizontal Decimation does not (or only to a very small extent) increase the camera's frame rate.
Configuring Decimation
To configure vertical Decimation, enter a value for the DecimationVertical parameter. To configure
horizontal Decimation, enter a value for the DecimationHorizontal parameter.
The value of the parameters defines the Decimation factor. Depending on your camera model, the
following values are available:
1: Disable Decimation.
2: Enable Decimation.
Considerations When Using Decimation
1)
Effect on ROI settings
The ROI feature and the Decimation feature cannot be used simultaneously. Taking MARS-2621-
42GTM/C as an example, the camera's default resolution is 5120×5120. Regardless of the camera's ROI
settings, when horizontal Decimation by 2 and vertical Decimation by 2 are enabled, the ROI size would
be fixed to 2560
×
2560, which is the result of enable Decimation under the default resolution, and the ROI
cannot be set at this time. When horizontal Decimation by 1 and vertical Decimation by 1 are enabled, the
effective resolution of the sensor is restored to 5120×5120.
2)
Simultaneous horizontal Decimation and vertical Decimation settings
Horizontal Decimation and vertical Decimation cannot be set separately. When one of them is modified,
the other will change to the same value. That is, you can only set horizontal Decimation and vertical
Decimation to ON or OFF at the same time.
3)
Reduced resolution
Using Decimation effectively reduces the resolution of the camera’s imaging sensor. Taking MARS-2621-
42GTM/C as an example, the camera's default resolution is 5120×5120. When horizontal Decimation by
2 and vertical Decimation by 2 are enabled, the effective resolution of the sensor is reduced to 2560
×
2560.
4)
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.
5)
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.
