13
3D camera O3X1xx
UK
5.4 Additional Information for CONFIDENCE_IMAGE
Bit
Value
Description
0
1 = pixel invalid
Pixel invalid
The pixel is invalid. To determine whether a pixel is valid or not
only this bit needs to be checked. The reason why the bit is
invalid is recorded in the other confidence bits.
1
1 = pixel saturated
Pixel is saturated
Contributes to pixel validity: yes
2
1 = bad A-B symmetry
A-B pixel symmetry
The A-B symmetry value of the four phase measurements is
above threshold.
Remark: This symmetry value is used to detect motion
artefacts. Noise (e.g. due to strong ambient light or very short
integration times) or PMD interference may also contribute.
Contributes to pixel validity: yes
3
1 = amplitude below
minimum amplitude
threshold
Amplitude limits
The amplitude value is below minimum amplitude threshold.
Contributes to pixel validity: yes
4
1 = exposure time
Exposure time indicator.
The bit is always set in single exposure mode. It is set in double
exposure mode when the long exposure time is used.
Contributes to pixel validity: no
5
1 = assignment error
Double Frequency assignment error.
The bit indicates a double frequency mismatch while calculating
the final distance. Possible reasons are fast movement in the
scene or disturbances due to straylight.
Contributes to pixel validity: yes
6
Reserved
7
Reserved