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9.Software Tool
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 194
The frame rate calculation tool is currently provided in the form of Excel. When using it, firstly select the
camera model in the table, and then achieve the expected frame rate by modifying the parameter of the
camera. There are four major types of influencing factors, including image readout time (image width,
image height, pixel format), exposure time, acquisition frame rate control, and device link throughput limit.
Table parameter explanation:
1)
The Width and Height are the set ROI size.
2)
For more details about BinningHorizontal, BinningVertical, DecimationHorizontal and DecimationVertical,
please refer to section 8.3.10 and section 8.3.11. These four parameters affect the transmission time of
the image data.
3)
The ExposureTime is the exposure time when the camera acquires one frame of image.
4)
The PixelFormat is the pixel format corresponding to the camera output image, including 8 bits, 10
bits or 12 bits.
5)
The DeviceLinkThroughputLimit represents the maximum bandwidth of the image transmitted by the
camera.
6)
The MaxUSBControllerThroughputLimit represents the recommended maximum transmission
bandwidth of the camera. If this value is exceeded, frame losing may occur.
7)
The AcquisitionFrameRate represents the maximum value of the frame rate control when the
AcquisitionFrameRateMode is set to on, and whether the maximum value can be reached depends
on whether the camera is affected by other acquisition parameters.
8)
AcquisitionFrameRateMode indicates whether frame rate control is enabled, On means frame rate
control is enabled, and Off means frame rate control is disabled. When frame rate control is enabled,
the camera acquires images at a frame rate no higher than the AcquisitionFrameRate. When frame
rate control is disabled, the camera acquires images without being affected by the
AcquisitionFrameRate.
When using the frame rate calculation tool, please fill in the above information of the camera into the
corresponding table. When the filled value exceeds the range or does not conform to the rules, the
calculation tool will report an error. Please modify and fill in the value again according to the prompt
information. When all parameters are correctly filled in, the FPS shown in the last column of the table is
the theoretical frame rate currently acquired by the camera, and usually the error between this value and
the actual frame rate acquired by the camera is no more than 1%.