42
L
The left po width and the upper po height may not exceed the
maximum resolution of the sensor.
L
The coordinates for width and height must be divisible by 2.
In addition to the Area of Interest some other parameters have an effect on the
maximum frame rate
the time for reading the image from the sensor and transporting it in the
FRAME_BUFFER
the time for transferring the image over the FireWire™ bus
the length of the exposure time
8.2
Binning
Binning is the process of combining neighboring pixels while being read out from the
CCD chip. This is done primarily for 3 reasons:
A reduction in the number of pixels and thus the amount of data while
retaining the original image area angle,
an increase in the frame rate,
an improvement in the separation of signal to noise.
Signal to noise ratio (SNR) and signal to noise separation specify the quality of a signal
with regard to its reproduction of intensities. The value signifies how high the ratio of
noise is in regard to the maximum signal intensity.
The higher this value, the better the signal quality. The unit of measurement used is
generally known as the decibel (dB), a logarithmic power level. 6 dB is the signal level
at approximately a factor of 2.
However, the advantages of increasing signal quality are accompanied by a reduction in
resolution.
Binning is possible only in video Format_7. The type of binning used depends on the
video mode. In general a difference is made between two types of binning, that can
also be combined: