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A camera-based speed measurement method, device and mobile terminal

A technology of speed measurement and camera, which is applied in the direction of devices for measuring the time required to move a certain distance, radio wave measurement system, electromagnetic wave re-radiation, etc., can solve the problems of reducing manufacturing costs and complex structure of speed measuring equipment, and achieve the goal of reducing manufacturing costs. cost, the effect of solving complex structures

Active Publication Date: 2018-06-01
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the object of the present invention is to propose a camera-based speed measurement method, device and mobile terminal to solve the problem of complex structure of speed measurement equipment and reduce manufacturing costs

Method used

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  • A camera-based speed measurement method, device and mobile terminal
  • A camera-based speed measurement method, device and mobile terminal
  • A camera-based speed measurement method, device and mobile terminal

Examples

Experimental program
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Embodiment 1

[0029] figure 1 It is a schematic flowchart of the camera-based speed measurement method provided in Embodiment 1 of the present invention. The method is suitable for measuring the linear moving speed of an object within a visible distance, and the method can be executed by a camera-based speed measuring device set in a mobile terminal. The device can be realized by software and / or hardware. Such as figure 1 As shown, the method includes:

[0030] Step 110 , after the camera is focused and its position is fixed, acquire two images of the object to be measured on the photosensitive surface of the camera, wherein the photosensitive surface is parallel to the traveling route of the object to be measured.

[0031] Exemplarily, when measuring the speed of the object to be measured, click the speed measurement icon on the mobile terminal, and the mobile terminal will automatically turn on the camera; see figure 2 , since the distance between the object to be measured 15 and the...

Embodiment 2

[0053] Figure 6 It is a structural block diagram of the camera-based speed measurement device provided by Embodiment 2 of the present invention. Such as Figure 6 As shown, the device includes: an imaging acquisition module 20 , an imaging displacement calculation module 21 , an object distance calculation module 22 , an actual displacement calculation module 23 and a speed calculation module 24 .

[0054] Wherein, the imaging acquisition module 20 is used to obtain two imaging images of the object to be measured on the photosensitive surface of the camera after the camera is focused and the position is fixed, wherein the photosensitive surface is parallel to the traveling route of the object to be measured;

[0055] The imaging displacement calculation module 21 is used to calculate the distance between the two imagings according to the positions of the two imagings on the photosensitive surface as the imaging displacement of the object to be measured;

[0056] The object ...

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Abstract

The invention discloses a camera-based speed measurement method, device and mobile terminal, wherein the method includes: after the camera is focused and its position is fixed, acquiring two imaging images of the object to be measured on the photosensitive surface of the camera, and the photosensitive surface is parallel Based on the travel route of the object to be measured; according to the position of the two images on the photosensitive surface, calculate the distance between the two images as the imaging displacement of the object to be measured; calculate the object distance according to the image distance and the focal length of the lens; The actual displacement of the object to be measured is calculated by imaging displacement, image distance and object distance; the speed of the object to be measured is calculated according to the actual displacement and the time interval between two imaging. Based on the built-in camera of the mobile terminal, the present invention measures the speed of moving objects without adding hardware equipment, and solves the problem of complex structure of the speed measuring device. The speed measuring device of the present invention has a simple structure and low cost.

Description

technical field [0001] The invention belongs to the technical field of mobile terminals, and relates to a camera-based speed measurement method, device and mobile terminal. Background technique [0002] In traffic engineering, speed is one of the basic important data for measuring and evaluating road performance and traffic conditions. There are many ways to collect speed data, including manual measurement of fixed distance travel time, pressure tube method, coil method, image processing method, radar speed measurement method and laser speed measurement method. Among them, the radar speed measurement method is a method with high accuracy, so it is widely used. [0003] However, radar is a complex electromechanical mechanism, which includes antenna, radome, feeder, antenna base, radar servo mechanical transmission, radar transmitter, radar case, cabinet and its accessories, special electromechanical devices, in order to ensure radar performance and The quality and the requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/68
Inventor 贺驰光
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD