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A distance measuring method and a distance measuring device

A distance measurement method and focal length technology, applied in the field of distance measurement, can solve problems such as limited measurement range, low distance measurement accuracy, and image distortion error of parallax readings, so as to achieve the effect of expanding the measurement range and improving measurement accuracy

Active Publication Date: 2022-07-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the binocular ranging system, both parallax readings and image distortion may cause errors
In addition, if the images of the two cameras are inconsistent, the matching of feature points will also cause errors, which will affect the measurement accuracy of the binocular ranging system
[0004] Therefore, whether it is monocular distance measurement or binocular distance measurement, the distance measurement accuracy is low, resulting in limited measurement range

Method used

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  • A distance measuring method and a distance measuring device
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  • A distance measuring method and a distance measuring device

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Embodiment Construction

[0190] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0191] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that data so used can be interchanged under appropriate circumstances so that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or d...

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Abstract

The embodiments of the present application disclose a ranging method and a ranging device, which are applied to the field of automatic driving or intelligent driving, and particularly relate to technologies such as environment perception and advanced driver assistance systems (ADAS). The ranging method includes: acquiring a first imaging size h of a target object from a first camera unit, acquiring a first parallax z of the target object from a second camera unit, and using the first relationship based on the second image size of the target object At least one of the physical size H' and the second baseline length b', and the first imaging size h and the first parallax z determine the target distance between the target object and the first camera unit or the second camera unit. The method combines monocular ranging and binocular ranging to determine the target distance, which can improve the measurement accuracy and expand the measurement range.

Description

technical field [0001] The embodiments of the present application relate to the field of ranging, and in particular, to a ranging method and a ranging device. Background technique [0002] The camera device refers to a device that converts optical image signals into electrical signals and stores or transmits them. Because the camera device has the characteristics of high resolution, easy to use, and capable of non-contact measurement, the camera device is often used as a ranging device for automatic driving environment perception, advanced driving assistant system (ADAS), etc. in the system. [0003] At present, the method of using a camera device for ranging includes monocular ranging and binocular ranging. Among them, the monocular ranging is to use a monocular camera device with only one camera to perform ranging by using the principle of pinhole imaging. The factors that affect the measurement accuracy of the monocular ranging system include the error of the focal len...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C3/10
CPCG01C3/10G01C3/00
Inventor 林永兵马莎
Owner HUAWEI TECH CO LTD