8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 107
The auto white balance feature can also select the color temperature. When the color temperature of the
selection is "Adaptive", the data in ROI always adjusting the red, green and blue to the same. When
selecting the specific color temperature, the camera adjusts the factor according to the light source, so
that the hue of the ROI is the same as the hue of the light source. That is: high temperature is cold, low
color temperature is warm.
The auto white balance feature is only available on color sensors.
8.4.5.
Color Transformation Control
The Color Transformation is used to correct the color information delivered by the sensor, improve the
color reproduction of the camera, and make the image closer to the human visual perception.
Figure 8-62 Color template
The user can use a color template containing 24 colors and shoot this color template with a camera, the
RGB value of each color may be different from the standard RGB value of the standard color template,
the vendor can use the software or hardware to convert the RGB value that is read to the standard RGB
value. Because the color space is continuous, all the other RGB values that are read can be converted to
the standard RGB values by using the mapping table created by the 24 colors.
1)
Prerequisites
For the color transformation to work properly, the white balance must first be configured appropriately.
2)
Configuring color transformation
Camera which not support light source preset function
There are two modes for configuring color transformation: default mode (RGBtoRGB), user-defined mode
(User).
RGBtoRGB: Default color transformation parameters provided to the camera when it leaves the factory.
User:
a)
Set the ColorTransformationValueSelector parameter to the expected position in the matrix, e.g.,
Gain00.
b)
Enter the expected value for the ColorTransformationValue parameter to adjust the value at the
selected position. The parameter’s value range is -4.0 to +4.0.
