JAI RM-2030CL, User Manual

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Operation 27
TM/TMC/RM/RMC-2030CL
5.2.7 Color Interpolation
The Bayer pattern color filter array (CFA) consists of R, G, and B primary colors. Each pixel represents one of
three colors. In order to display or print color images, the signal has to be converted to RGB output, which has
three independent channels (outputs) and sync signals.
Color interpolation software or firmware performs the color preprocessing by filling the missing color pixels
with neighboring pixels. It then separates the stream of data, (8-bit or 10-bit) into 3 (RGB) data (8-bit x 3) and
adds the color matrix to adjust and balance each of the R,G, and B channels (white balance or color balance).
Figure 42. Color Interpolation Diagram
The image quality depends on the camera’s own pixel data (including pixel data independency from
neighboring pixels, noise and color filter), and interpolation of the software algorithm such as 3 x 3
interpolation, 2 x 2 interpolation, color matrix, white balance capability, and so on.
All AccuPiXEL color cameras are carefully designed for maximum color performance. JAI Inc. strongly suggests
that you use digital output for the best performance.
Some software is used on board (FPGA or DSP) to perform the interpolation. Other software simply uses the
host computer’s memory and CPU. The process speed may vary depending on the architecture and speed of the
computer.
5.3 Dynamic Range Control
Figure 43. Output and Blooming
The typical interline transfer CCD has fixed noise levels based on dark current (thermal or KT noise), pattern