8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 154
Even if the current light source is selected as the light source preset, users can also manually adjust the
white balance coefficient.
Users can turn on the color conversion enable switch and calibrate according to the color conversion
coefficient of the Daylight-6500K light source (manual input of color correction coefficients is not
supported).
The option operation of Daylight5000K, CoolWhiteFluorescence, INCA is the same as Daylight-6500K.
2)
ME2L Series
The ME2L series camera supports light source preset function, and provides Off mode and four specified
common color temperature light source modes.
Off Mode
The camera does not perform white balance and color conversion processing on the image by default,
and you need to input the white balance coefficient manually or use the auto white balance function.
Perform color correction in Off mode is the same as without color correction.
Specified Color Temperature Modes (for example, Daylight-6500K)
The camera performs white balance processing on the image by default, and supports manual modification
of the white balance ratio under the current color temperature or auto white balance function. The color
correction is enabled when the color correction check box is checked in the image processing plug-in.
8.4.2.
Auto White Balance
MERCURY2 USB3 Vision camera supports auto white balance function and supports "Once" mode and
"Continuous" mode. Auto white balance of ME2L series cameras is performed by software, so it has a
certain impact on the acquisition performance. It only supports "Once" mode and "Manual" mode (auto
white balance off mode).
Auto White Balance ROI
Auto White Balance feature use the image data from AWBROI to calculate the white balance ratio, and
then the white balance ratio is used to adjust the components of the image.
ROI is defined in the following way:
AWBROIOffsetX: The offset of the X axis direction.
AWBROIOffsetY: The offset of the Y axis direction.
AWBROIWidth: The width of ROI.
AWBROIHeight: The height of ROI.
Offset is the offset value that relative to the upper left corner of the image. Where the step of
AWBROIOffsetX and AWBROIWidth is 4, the step of AWBROIOffsetY and AWBROIHeight is 2. The ROI
setting depends on the current image’s size and cannot exceed the current image range. Assuming the
current image width is Width, the image height is Height, then the ROI setting need to meet the following
condition 2:
AWBRO AWBROIOffsetX ≤ Width