8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 131
When using multi-cameras at the same time, it is necessary to ensure the uniqueness of the
user-defined name of each camera, otherwise, an exception will occur when the camera is
opened.
8.3.9.
Timestamp
The timestamp feature counts the number of ticks generated by the camera's internal device clock. As
soon as the camera is powered on, it starts generating and counting clock ticks. The counter is reset to 0
whenever the camera is powered off and on again. Some of the camera's features use timestamp values,
such as event, frame information, and timestamps can be used to test the time spent on some of the
camera's operations.
The unit of timestamp is ns.
8.3.10.
Binning
The feature of Binning is to combine multiple pixels adjacent to each other in the sensor into a single value,
and process the average value of multiple pixels or sum the multiple pixel values, which may increase the
signal-to-noise ratio or the camera's response to light.
How Binning Works
On color cameras, the camera combines (sums or averages) the pixel values of adjacent pixels of the
same color:
R
G
B
G
R
G
G
B
Figure 8-46 Horizontal color Binning by 2
R
G
B
G
R
G
G
B
Figure 8-47 Vertical color Binning by 2
When the horizontal Binning factor and the vertical Binning factor are both set to 2, the camera combines
the adjacent 4 sub-pixels of the same color according to the corresponding positions, and outputs the
combined pixel values as one sub-pixel.
R
G
B
G
R
G
G
B
R
G
G
B
R
G
G
B
Figure 8-48 Horizontal and vertical color Binning by 2×2