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Description of the data path
Color interpolation (BAYER demosaicing)
The color sensors capture the color information via so-called primary color
(R-G-B) filters placed over the individual pixels in a BAYER mosaic layout.
An effective BAYER
color version cameras.
In color interpolation a red, green or blue value is determined for each pixel.
An AVT proprietary BAYER demosaicing algorithm is used for this interpola-
tion (max. 3x3), optimized for both sharpness of contours as well as reduc-
tion of false edge coloring.
Figure 83: BAYER demosaicing (example of 3x3 matrix)
Color processing can be bypassed by using so-called RAW image transfer.
RAW mode is primarily used to
•
save bandwidths on the IEEE 1394 bus
•
achieve higher frame rates
•
use different BAYER demosaicing algorithms on the PC (for PIKE F-145
and PIKE F-505 the first pixel of the sensor is RED, for all other Pike the
first pixel is GREEN followed by RED).
Note
If the PC does not perform BAYER to RGB post-processing, the
b/w image will be superimposed with a checkerboard pattern.
RGB color interpolation already takes place in all Pike
x
PIKE Technical Manual V4.1.0
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