Table of Contents
Advertisement
3.9.6
Interpolation Software
The color interpolation can be performed in the frame grabber or by using the host computer's CPU. Most
major frame grabbers with processing capability provide tools for color interpolation. Software vision packages
also provide color interpolation capability, but speed and performance may be determined by the PC's
resources and by the complexity of the interpolation routine.
3.9.7
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).
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, etc.
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.
20
TM/TMC/RM/RMC-1402 Series
Operation
Advertisement
Table of Contents
