31
7.3
Wide Dynamic Range
As mentioned above, Most of the ToF based 3D sensing technology has range
limitation to nearest and furthest distance, due to the sensor saturation of weak light
strength to far objects. One range mode of the Vzense DCAM550 camera can fulfill
furthest distance be at most 5 times to nearest distance. For example, if the near
limitation is 0.4m, then the furthest distance in this mode can reach about 2m.
Wide dynamic range means that the camera can work at more than one range modes
alternately, then the camera itself will combine the frames of all ranges into one depth
frame, therefore can expand the range limitation from furthest distance to nearest
distance.
However the frame rate will be reduced.
0
0.005
0.01
0.015
0.02
0.025
250
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
D
ISTA
N
C
E
ERR
OR
DISTANCE RANGE UNIT MM
