Range image system for obtaining subject image of predetermined distance position
First Claim
1. A range image system comprising:
- an infrared emitting device for emitting infrared pulsed light to a scene;
an imaging device in which first light receive elements for receiving visible light and second light receive elements for receiving infrared light are two-dimensionally disposed, said imaging device photoelectrically converting the visible light and the infrared light of said scene received by said first and second light receive elements to output a first pixel signal, which corresponds to a charge amount of a signal charge accumulated in said first light receive element, and a second pixel signal, which corresponds to a charge amount of a signal charge accumulated in said second light receive element, in time series;
an imaging controller for activating said imaging device to periodically output the first and second pixel signals of one frame every one-frame scanning period, said imaging controller delaying a light-receiving period of said second light receive element from the emission of said pulsed light of said infrared emitting device by a predetermined time so as to receive the pulsed light reflected from a predetermined distance position;
an emission controller for controlling emission timing of said infrared emitting device to perform emission of said pulsed light every other one-frame scanning period;
a first frame memory for storing the first and second pixel signals of one frame obtained by imaging of emission time of said pulsed light;
a second frame memory for storing the first and second pixel signals of one frame obtained by imaging of non-emission time of said pulsed light; and
a signal processor for producing a first visible-light image based on said first pixel signal stored in said first frame memory, and for producing a second visible-light image based on said first pixel signal stored in said second frame memory, said signal processor producing a range image by subtracting said second pixel signal stored in said second frame memory from said second pixel signal stored in said first frame memory.
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Accused Products
Abstract
A solid-state imaging device has a single plate structure and is capable of imaging of visible light and infrared light. While imaging of the visible light and the infrared light is performed by the imaging device every one-frame scanning period, an IR pulse is emitted, every other one-frame scanning period, to a space to be shot. A visible-light image is produced every one-frame scanning period. A range image from which influence to be caused by infrared component of the ambient light is removed is produced every other one-frame scanning period by subtracting an IR pixel image (S2IR), which is obtained by imaging of non-emission time of the IR pulse, from an IR pixel signal (S1IR), which is obtained by imaging of emission time of the IR pulse.
34 Citations
10 Claims
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1. A range image system comprising:
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an infrared emitting device for emitting infrared pulsed light to a scene; an imaging device in which first light receive elements for receiving visible light and second light receive elements for receiving infrared light are two-dimensionally disposed, said imaging device photoelectrically converting the visible light and the infrared light of said scene received by said first and second light receive elements to output a first pixel signal, which corresponds to a charge amount of a signal charge accumulated in said first light receive element, and a second pixel signal, which corresponds to a charge amount of a signal charge accumulated in said second light receive element, in time series; an imaging controller for activating said imaging device to periodically output the first and second pixel signals of one frame every one-frame scanning period, said imaging controller delaying a light-receiving period of said second light receive element from the emission of said pulsed light of said infrared emitting device by a predetermined time so as to receive the pulsed light reflected from a predetermined distance position; an emission controller for controlling emission timing of said infrared emitting device to perform emission of said pulsed light every other one-frame scanning period; a first frame memory for storing the first and second pixel signals of one frame obtained by imaging of emission time of said pulsed light; a second frame memory for storing the first and second pixel signals of one frame obtained by imaging of non-emission time of said pulsed light; and a signal processor for producing a first visible-light image based on said first pixel signal stored in said first frame memory, and for producing a second visible-light image based on said first pixel signal stored in said second frame memory, said signal processor producing a range image by subtracting said second pixel signal stored in said second frame memory from said second pixel signal stored in said first frame memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification