Method and device for measuring distance of target object
A technology of target object and relative distance, applied in measurement devices, radio wave measurement systems, photo interpretation, etc. Accuracy, relative distance accurate effect
Pending Publication Date: 2020-01-10
BEIJING HORIZON ROBOTICS TECH RES & DEV CO LTD
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Problems solved by technology
For example, if the distance measurement between the front and rear vehicles is inaccurate, the vehicle behind will easily rear-end the vehicle in front, causing traffic accidents and seriously affecting driving safety.
For another example, the measurement distance of the front and rear drones is not accurate, which may lead to accidents such as collisions and crashes of drones
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[0023] Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described here.
[0024] Application overview
[0025] At present, distance measurement methods are generally divided into monocular distance measurement, binocular distance measurement, trinocular distance measurement, etc., which are divided according to the number of image acquisition devices. For example, monocular ranging is that a single image acquisition device (in the rear mobile device) measures the distance between the rear mobile device and the front mobile device (also referred to as "target object" in this application).
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The invention discloses a method for measuring the distance of a target object. According to an image obtained by an image acquisition device, a first width of the target object in the image is obtained; then related state parameters of the target object at a previous moment are obtained; then according to the related state parameters of the target object, a first relative distance is obtained, since the related state parameters can truly reflect the state of the target object, a true distance between two movable devices can be obtained; in addition, according to the first relative distance, asecond width of the target object is obtained; and a relative difference is obtained according to the first width and the second width, and the first relative distance is updated to the second relative distance according to the relative difference. It can be seen that the method for measuring the distance of the target object uses different methods to obtain the width of the target object, and the comparison result of the width can be used for constraining the relative distance between the two mobile devices to enable the relative distance to be more accurate to achieve the accuracy of distance measurement.
Description
technical field [0001] The present application relates to the technical field of automatic driving, and in particular to a method and device for measuring the distance of a target object. Background technique [0002] With the continuous development of science and technology, automatic driving has also been developed rapidly. Autonomous driving does not require a driver, and the entire process is automatically controlled by a computer. [0003] One of the key points of autonomous driving research is ranging, that is, measuring the distance between the previous automatic driving device and the current automatic driving device. Distance measurement directly affects driving safety and driving efficiency. For example, if the distance measurement between the front and rear vehicles is inaccurate, the vehicle behind will easily rear-end the vehicle in front, causing traffic accidents and seriously affecting driving safety. For another example, the measurement distance of the fr...
Claims
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Login to View More IPC IPC(8): G01C11/04G01S11/12
CPCG01C11/04G01S11/12
Inventor 潘铭星
Owner BEIJING HORIZON ROBOTICS TECH RES & DEV CO LTD