8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 113
1.
Acquisition frame count: frame count of acquisition frames of bright field image.
1)
It is not a necessary step, generally the default value is used.
2)
If the image noise is high, it is recommended to increase the acquisition frame count.
2.
Acquisition of bright field images: perform this function to complete the bright field image acquisition.
1)
It is recommended to aim at the white paper or the flat fluorescent lamp (to ensure the same
amount of light in different areas of the sensor), and adjust the distance between the camera
and the white paper/flat fluorescent lamp to fill the entire field of view.
2)
Do not overexpose the image. The gray value of the brightest area of the brightfield is
recommended to be less than 250.
3)
The image should not be too dark. The gray value of the darkest area of the brightfield is
recommended to be greater than 20.
4)
It is recommended to control the bright field gray value by adjusting the exposure time or light
source, and do not adjust the aperture.
3.
Execute FFC: Calculate the FFC coefficient using the acquired images. After execution, the
subsequent images automatically use the calculated coefficients for FFC.
4.
Preview: Preview the effect of the current FFC.
8.4.9.1.2.
Read/Save Coefficient
Read coefficient: The saved correction coefficient can be read from the device
Save coefficient: Save the current FFC coefficient to the device. The coefficient can still be saved
after the camera is powered down
8.4.9.1.3.
Load/Save File
Load from file: Load the saved FFC coefficient file (format: .ffc) from the file
Save to file: Save the current coefficient to the FFC coefficient file (format: .ffc)
8.4.9.2.
Camera Calibration
[FlatFieldCorrection] Off: FFC enabled. On: Use the coefficient set through the FFCCoefficient for FFC.
[FFCCoefficient] Select FFC coefficient number, from Set0 to Set15, 16 sets FFC coefficients in total.
[FFCGenerate] Generate FFC coefficient, the number of the FFC coefficient is the value set in the
FFCCoefficient, users can calibrate 16 sets FFC coefficients.
[FFCGenerateStatus] The indicate status calibrated by the camera’s inner FFC coefficient. “Idle” means
that FFC coefficient calibration is enabled, while “WaitImaging” means that the
camera is waiting for images to calculate the FFC coefficient.
[FFCFlashSave] Save the set value of FFCCoefficient to the camera’s Flash, which cannot be lost during
power failures.
