JAI RMC-4200GE User Manual

Contents

JAI RMC-4200GE User Manual Manual pdf 23 page image

Operation 23RM/TM-4200GE Series3.2.6 Interpolation SoftwareThe color interpolation can be performed in the framegrabber or by using the host computer’s CPU. Most majorframegrabbers with processing capability provide tools for color interpolation. Software vision packages alsoprovide color interpolation capability, but speed and performance may be determined by the PC’s resourcesand by the complexity of the interpolation routine.3.2.7 Color InterpolationThe Bayer pattern color filter array (CFA) consists of R, G, and B primary colors. Each pixel represents one ofthree colors. In order to display or print color images, the signal has to be converted to RGB output, which hasthree independent channels (outputs) and sync signals.Color interpolation software or firmware performs the color preprocessing by fillingthe 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 andbalance 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 dataindependency from neighboring pixels, noise and color filter), and interpolation ofthe 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 suggeststhat 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 thehost computer’s memory and CPU. The processing speed may vary depending on the architecture and speed ofthe computer.3.3 Electronic ShutterThe TM-4200GE has a substrate drain-type shutter mechanism which provides a superb picture at various speedswithout smearing.3.3.1 Preset ShutterTable 3 Electronic Preset ShutterShutter SpeedDual Tap Single TapContinuousMode (sec)Async Mode(sec)ContinuousMode (sec)Async Mode(sec)0 No shutter No shutter No shutter No shutter1 1/60 1/16000 1/35 1/90002 1/125 1/8000 1/70 1/45003 1/250 1/4000 1/140 1/22504 1/500 1/2000 1/280 1/11205 1/1000 1/1000 1/560 1/5606 1/2000 1/500 1/1120 1/2807 1/4000 1/250 1/2250 1/1408 1/8000 1/125 1/4500 1/709 1/16000 PWC 1/9000 PWC3.3.2 Programmable Exposure-Continuous ModeThe exposure time of TM/TMC-4200GE can be specified from one video line to a maximum of one frame usingthe serial communication commands in the Continuous Mode. There is overhead where the specified exposuretime is n video lines, making the real exposure time equal to