7
Example: long black hair
A long dark hair returns much less photons that a blond hair. Therefore, the reflected signal is lower and the
reported distance may be bigger than the real distance, since the device gets a mixed signal of photons that have
bounced on the hair of the tracked person and on the floor.
Figure 13. Example of a fast moving person with long black hair
shows an example of a fast moving person
with long black hair. In this case, the algorithm does not count the person if the threshold is set with the value
corresponding to the red line. It is recommended to set a threshold at its maximum possible value, but still less
than the minimum value reported by the autocalibration, as described in
Section 6.1 Ranging on the floor to
Figure 13.
Example of a fast moving person with long black hair
UM2600
Example: long black hair
UM2600
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Rev 2
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