BOBCAT Hardware User’s Manual
Imperx, Inc.
Rev. 2.0.6
6421 Congress Ave.
11/20/2012
Boca Raton, FL 33487
+1 (561) 989-0006
132 of 265
2.13 WHITE BALANCE AND COLOR CONVERSION
2.13.1 White Balance
The color representation in the image depends on the color temperature of the light
source. Bobcat has built in algorithm to compensate for this. When white balance
correction is enabled, the camera collects the luminance data for each of the primary
colors R, G and B, analyzes it, and adjusts the color setting in order to preserve the
original colors and make white objects to appear white. The algorithm collects data
from the entire image, and can work in four different modes – “Off”, “Once”,
“Auto” and “Manual”. When set to “Off” no color correction is performed. When set
to “Once” the camera analyzes only one image frame, calculates only one set
correction coefficients, and all subsequent frames are corrected with this set of
coefficients. When set to “Manual” the camera uses the correction coefficients as
entered from the user. In “Auto” mode the camera analyzes every frame, a set of
correction coefficients are derived for each frame and applied to the next frame. All
Bobcat color cameras support white balance feature.
2.13.2 Color (Bayer to RGB) Conversion
All single tap only Bobcat cameras support Bayer to RGB interpolation algorithm.
The color interpolation is based on (5 x 5) algorithm with approximation in order to
achieve a good and pure color representation. The algorithm also allows for
individual control of the gain and offset of the primary R G B colors. The camera
also can output raw pixel data - user has an option to set the mode.
The cameras supporting the internal Bayer to RGB interpolations are B0610, B1310,
B1410, B1411 and B1610.
