Image capturing device

A camera device, camera technology, used in measuring devices, using optical devices, measuring distances, etc.

Active Publication Date: 2020-11-20
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, there are cases where the object is irradiated with multiple types of light, and distance measurement is performed using the results of measurement of each light.

Method used

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Experimental program
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Effect test

Embodiment approach 1

[0045] figure 1 It is a configuration diagram of the stereo camera 100 according to Embodiment 1 of the present invention. The stereo camera 100 is an imaging system that projects structured light using headlights mounted on a vehicle. The stereo camera 100 has an optical unit 101 , a signal processing unit 102 , a distance calculation unit 103 , an object recognition unit 104 , a vehicle control unit 105 , and a control unit 106 . A vehicle equipped with a stereo camera 100 has a headlight 200 , a headlight 300 , and a vehicle controller 400 . The signals a, b1, and b2 will be described later.

[0046] The stereo camera 100 starts a distance measuring operation after performing a start-up operation and a self-diagnosis when the accessory power of the vehicle on which the stereo camera is mounted is turned on. The optical unit 101 has two pairs of lenses and imaging elements. The optical unit 101 determines exposure settings such as shutter speed and gain based on informat...

Embodiment approach 2

[0080] Figure 17 It is a configuration diagram of a stereo camera 700 according to Embodiment 2 of the present invention. The stereo camera 700 projects structured light using a laser light source. The optical unit 701 to the control unit 706 are functional units similar to the optical unit 101 to the control unit 106 in the first embodiment. A vehicle equipped with a stereo camera 100 has a laser light source 707 and a vehicle controller 400 . The laser light source 707 controls the pattern, projection area, light intensity, etc. of the structured light based on the signal sent from the control unit 706 . The signals a and b will be described later.

[0081] Figure 18 This is an example of a projection pattern when the laser light source 707 projects structured light. For illustration, structured light is shown with 2 straight lines extending in the direction of travel. The darker the color, the higher the illuminance, and the lighter the color, the lower the illumina...

Embodiment approach 3

[0101] Figure 27 It is a configuration diagram of the video camera 1000 according to Embodiment 3 of the present invention. In Embodiment 3, the optical unit 1001 has a pair of lenses and imaging elements. The signal processing unit 1002 to the control unit 1006 are functional units similar to those of the signal processing unit 102 to the control unit 106 in the first embodiment. Embodiment 3 differs from Embodiment 1 in that the relative position between the edge portion formed at the boundary between the low-illuminance portion and the high-illuminance portion and the optical portion 1001 is known. Other than that, it is the same as Embodiment 1. Also in this third embodiment, the distance can be measured by the same principle as that of the first embodiment.

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Abstract

The purpose of the present invention is to provide technology with which the distance to even a distant object can be accurately measured when using structured light to acquire the distance to the object. An image capturing device according to the present invention changes at least one among the optical density of structured light and the pattern size of structured light according to the distancefrom a light source to a light projection location.

Description

technical field [0001] The present invention relates to an imaging device for obtaining the distance to an object using structured light. Background technique [0002] As a technique for obtaining the distance to an object, there is a technique for measuring the distance to the object by irradiating light to the object and measuring the light reflected from the object. Furthermore, there are cases where the object is irradiated with multiple types of light, and distance measurement is performed using the results of measurement of the respective lights. [0003] Patent Document 1 below describes an object recognition device using a stereo camera. This document discloses that "the main feature is that it includes: a projection unit 110 that projects light on the target object 1, and an active rangefinder 100 for calculating the distance from the target object 1 based on the reflected light; The stereo camera 200 for obtaining the distance from the target object 1; the object...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C3/06G01B11/00
CPCG01B11/00G01C3/06
Inventor 今川制时村松彰二别井圭一
Owner HITACHI ASTEMO LTD
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