Additional Information For Confidence_Image - IFM Electronic O3D301 Bedienungsanleitung

3D Kamera

13.3.4 Additional Information for CONFIDENCE_IMAGE

Further information for the confidence image:
Bit Value
0 1 = pixel invalid
1 1 = pixel saturated
2 1 = bad A-B symmetry
3 1 = amplitude below
minimum amplitude
threshold
4+5 Bit 5, bit 4
0 0 = unused
0 1 = shortest exposure
time (only used in 3
exposure mode)
1 0 = middle exposure
time in 3 exposure mode,
short exposure in double
exposure mode
1 1 = longest exposure
time (always 1 in single
exposure mode)
6 1 = pixel is clipped
7 1 = suspect/defective pixel
26
Description
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.
Pixel is saturated
Contributes to pixel validity: yes
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
Amplitude limits
The amplitude value is below minimum amplitude threshold.
Contributes to pixel validity: yes
Exposure time indicator
The two bits indicate which exposure time was used in a
multiple exposure measurement.
Contributes to pixel validity: no
Clipping box on 3D data
If clipping is active this bit indicates that the pixel coordinates
are outside the defined volume.
Contributes to pixel validity: yes
Suspect pixel
This pixel has been marked as "suspect" or "defective" and
values have been replaced by interpolated values from the
surroundings.
Contributes to pixel validity: no