ALLIED Vision Technologies Pike F-1600 - Manual (Page 195)

Description of the data path
PIKE Technical Manual V5.1.2
195
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  RGB color interpolation already takes place in all Pike 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 interpolation
(max. 3x3), optimized for both sharpness of contours as well as reduction of
false edge coloring.
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).
Figure 107: BAYER demosaicing (example of 3x3 matrix)
Note

If the PC does not perform BAYER to RGB post-processing, the
b/w image will be superimposed with a checkerboard pattern.
x