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Description of the data path
OSCAR Technical Manual V2.4.0
53
Black and white output interpolation modes
Various black and white output interpolation modes have been implemented
in the data path to ensure high quality black and white image output.
The cameras are able to output:
• B/w signal out of luma interpolation formula (Y = 0.3R + 0.6G + 0.1B)
• B/w signal out of RED channel information
• B/w signal out of GREEN channel information
• B/w signal out of BLUE channel information
For certain applications where the camera is imposed to monochromatic
light, it may be advantageous (in terms of reduced noise) to use only the
respective color channel instead of the fully interpolated luma signal.
Example: If you illuminate a scene with green light, the use of b/w output
from the GREEN channel may give better image with less noise than b/w out
of luma.
The b/w image is also spatially interpolated, so that it has the same amount
of pixels as the color image.
Read out modes of the sensor
In order to achieve the highest possible sensitivity, all sensors are equipped
with micro lenses, and read-out in the so called frame readout mode. This
is a special frame integration interlaced field readout mode, very similar to
the interlaced mode of conventional video cameras.
Whereas Oscar F-320C and Oscar F-510C have two field readouts, the Oscar F-
810C is equipped with a three field readout sensor.
The conversion from interlaced to progressive takes place in the camera's
internal memory.
Special sub-sampling modes allow faster progressive scan readouts, while
maintaining the same imaging conditions. These modes can be effectively
used for focus and aperture adjustment operations.
The following samples are taken out of the data sheets of the sensors, detail-
ing the various modes.
Note
L
Spatial resolution is because of the present BAYER Mosaic fil-
ter nevertheless only half of that in each direction of a (fic-
tive) b/w sensor.