Apparatus, method, and program for generating range-image-data

Details Apparatus, method, and program for generating range-image-data Apparatus, method, and program for generating range-image-data

2007-06-12

2007-06-12

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S004070, C356S614000, C382S106000

Reexamination Certificate

active

11007258

ABSTRACT:
First image data including a first pixel value according to the intensity of background light is obtained by means of only exposure. Second image data including a second pixel value according to the intensity of the light reflected or scattered by an object is obtained by so controlling light emission and exposure as to receive part of the reflected or scattered light over the whole exposure period. The part of the reflected or scattered light corresponds to the flat period of emitted pulsed light. Third image data including a third pixel value according to the distance to the object is obtained by so controlling light emission and exposure as to receive the part of the reflected or scattered light for a time according to the distance. The first pixel value is subtracted from each of the second and third pixel values so that the influence of the background light can be excluded. The ratio between the subtraction results is calculated so that the influences of factors that vary the intensity of the reflected or scattered light can be cancelled.

REFERENCES:
patent: 6373557 (2002-04-01), Mengel et al.

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