JAI TM-1327GE Series, User Manual, Page: 38 / 52

TM/ RM-1327GE Series
38 Hardware Operation
Figure 31. Example of TMC-1327GE in Default Mode
8.2.5 Camera Functions
AccuPiXEL color cameras perform all functions the same way as B/W cameras. However, because of
color characteristics, the LUT (Look-up Table) is different. The LUT is a powerful tool to adjust the
dynamic range as well as color dynamic range. Since human color perception is non-linear, LUT
selection can help optimize color contrast by selecting the LUT value. Gamma 0.45 is logarithmic
and is closed to human perception.
When LUT is selected, black-level adjustment must be more accurate than for B/W cameras.
For a detailed timing chart, please refer to the standard AccuPiXEL camera data sheet, or contact
JAI.
8.2.6 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. 8.2.7 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).