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3.11.3 Starting Pixel Configuration
All manufacturers produce identical Bayer CFAs, but there are slight differences between the CCDs produced by different manufacturers. The first line is generally R and G, except for the Kodak CCD, which starts with G. The Sony CCD starts with R. The camera timing can be adjusted to start with either G or R by skipping the very first pixels at each line. Most color interpolation software can select between a variety of pixel relations, such as R/G start or G/R start, as well as G/B start and B/G start. Once the correct scanning is configured, the rest of the interpolation will be exactly the same. Please contact JAI, Inc. for further information regarding CCD manufacturers.
FIGURE 10. Starting Pixel Configuration
CCD Output
| B G B G B G | B G B G B G | ||
| G R G R G R | G R G R G R | ||
| B G B G B G | B G B G B G | ||
| G R G R G R | G R G R G R | ||
| B G B G B G | B G B G B G | ||
| G R G R G R | G R G R G R | ||
| B G B G B G | B G B G B G | ||
Pixel 1 | G | R G R G R | G R G R G | R |
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| Horizontal Shift Registers |
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Last pixel
Last pixel of 1st Line
CCD Output
| G B G B G B | G B G B G B | |||||
| R G R G R G | R G R G R G | |||||
| G B G B G B | G B G B G B | |||||
| R G R G R G | R G R G R G | |||||
| G B G B G B | G B G B G B | |||||
| R G R G R G | R G R G R G | |||||
| G B G B G B | G B G B G B | |||||
Pixel 1 | R | G | R | G | R | G | R G R G R G |
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|
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| Horizontal Shift Registers | ||
Last pixel
Last pixel of 1st Line
KODAK CCD
SONY CCD
3.11.4 Sync and Data
The individual color data is exactly the same as the pixel data. This means that the timing relationships of the color cameras are also the same as those of the B/W cameras. For a detailed timing chart, please refer to each B/W camera’s data sheet and manual. If the framegrabber has a standard B/W configuration file, then AccuPiXEL color cameras can use that configuration file to operate. The configuration file may vary, depending on whether the output is standard
The following diagram is an example of the
Operation
