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Auto Channel Balance Developed by VRmagic
A well-known problem of black-and-white sensors is pattern formation in the gray area. This phenomenon occurs if the same hardware is used for the black-and-white sensor as for a color sensor. Although the sensor surface does not then have a Bayer pattern, which filters the analog color information according to the colors red, green and blue, the signal still passes through three separate channels in the hardware. In color sensors, these three amplifier circuits allow individual adjustment of the colors, e.g. for white balancing. If used with a black-and-white sensor, the separate channels lead to different gain values for neighboring pixels. In order to prevent the resultant patterns in the image, it was necessary in the past to manually adjust the gain. VRmagic (Mannheim, Germany) has now developed an algorithm that automatically measures and corrects differences in pixel gain. The function has been integrated in the API and CamLab from VRMagic under the name "Auto Channel Balance" and is currently implemented for the camera models VRmC-9/BW, VRmC-9+/BW, VRmFC-9/BW and VRmDC-9/BW.
About VRmagic
Founded in Mannheim, Germany, in 2001,
VRmagic develops, manufactures and sells cameras for industrial image
processing, optical tracking systems and VR technology. A second business
division specializes in simulators for surgical training. For further
information please go to: www.vrmagic.com
Press contact:
Meike Hummerich
E-mail: hummerich@vrmagic.com
Phone: +49
(0)621/ 400 416 - 23
Fax: +49 (0)621/ 400 416 - 99
