Allied Vision Technologies Pike Manual de instrucciones descargar pdf (Pagina 162)

Description of the data path

PIKE Technical Manual V4.0.0

162

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 interpola-

tion (max. 3x3), optimized for both sharpness of contours as well as reduc-

tion 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

the first pixel of the sensor is RED, for all other Pikes the first pixel is

GREEN followed by RED).

Figure 90: 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.

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Allied Vision Technologies Pike Manual de instrucciones Pagina 162