9.Software Tools
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 122
5) If the brightness of the acquired brightfield image is greater than 250, the prompt box will prompt that
the acquired brightfield image will affect the effect of flat field correction, as shown in Figure 9-17. In
this case, it is recommended that you adjust the image brightness to 20 ~ 250, and then re-acquiring
the brightfield image.
1) The larger the "Acquisition Frame Count" is set, the longer it will take to acquire the
brightfield image.
2) White balance is applied when acquiring brightfield images (only color camera), so during
the acquisition of brightfield image, the image displayed in GalaxyView have executed white
balance. After the brightfield image is acquired, the parameter configuration of the device
will be restored.
9.3.2.4. Execute FFC
1) "Execute FFC" is enabled after the brightfield image acquisition is completed.
2) Click "Execute FFC" to calculate the flat field correction coefficient and set it to the device to take
effect in real time. If the factor is not written to the device, the factor will be lost when the device is
powered down and the flat field correction needs to be done again.
3) When the flat field correction is completed, the preview widget takes effect, and the preview function
can be used to check the effects before and after the flat field correction.
9.3.2.5. Read FFC Data from Device / Write FFC Data to Device
1) When select read FFC data from device or write FFC data to device, flat field correction is enabled by
default. Therefore, the flat field correction takes effect in real time after successful reading from the
device.
2) When writing to the device, User parameter group is saved and the UserSetDefault is set to userset0.
9.3.2.6. Load FFC Data from File / Save FFC Data to File
1) When loading FFC data from file or saving FFC data to file, the flat field correction is enabled by
default, so after the file is successfully loaded, the flat field correction takes effect in real time.
2) When loading FFC data from file or saving FFC data to file, the default file path is under the installation
path (*\GalaxySDK\Demo\Win64\resource\gxplugins\FlatFieldCorrection).
When loading from a file, only files with a format of .ffc can be opened.
9.3.3. Precautions
9.3.3.1. FFC is not Supported
When the device does not support FFC, all widgets of the FFC plugin are disabled. The prompt box
indicates that the device does not support FFC. Therefore, the FFC cannot be used for this device.
