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Method and system for estimating target distance using single camera

A target distance, single-camera technology, applied in computing, image data processing, instruments, etc., can solve the problems of long time-consuming distance measurement and high equipment cost

Pending Publication Date: 2021-03-12
青岛科美创视智能科技有限公司
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  • Application Information

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Problems solved by technology

However, binocular camera ranging requires camera calibration and two images to be processed. The pre-processing and ranging takes a long time, and the equipment cost is high.

Method used

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  • Method and system for estimating target distance using single camera
  • Method and system for estimating target distance using single camera
  • Method and system for estimating target distance using single camera

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Embodiment Construction

[0023] The method for estimating the target distance using a single camera provided in this embodiment includes steps S1-S3.

[0024] Step S1: Set a reasonable distance, and take multiple clear images of the subject from near to far. In this embodiment, for the first shooting, the subject needs to be fixed on the scale table, the position of the camera and the aperture should not change, and the focal length of the camera should be adjusted until the subject is clearly visible. Collect the image of the subject and record the position of the subject on the scale table.

[0025] Step S2: Obtain the area value of the captured object image, and obtain the linear relationship between the object distance and the area value of the object image through linear fitting.

[0026] See figure 1 , set subject 1, camera 2, camera imaging surface 3 and camera lens plane 4, and obtain the radius value R of the image of subject 1, the radius value H of subject 1, and the camera focal length v...

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Abstract

The invention provides a method and a system for estimating a target distance by using a single camera. The method comprises the following steps of: shooting a clear image of an object by using a focusing camera; then manually measuring the radius value of the shot object, obtaining the area value of the shot initial shot object image through an image processing means, obtaining the linear relation between the distance of the initial shot object and the area value of the initial shot object image, wherein the linear coefficient of the linear relation is determined by the initial focal length value of the camera and the radius value of the initial shot object; and finally, shooting a new shot object image after adjusting the focal length of the camera, obtaining the area of the new shot object image, and calculating the distance between the camera and the new shot object according to the linear relationship. Thus, camera calibration is not needed each time, and camera target distance measurement can be completed only by acquiring the image area.

Description

technical field [0001] The invention belongs to the technical field of visual image algorithms, in particular to the field of visual ranging algorithms, and specifically relates to a method and system for estimating target distances using a single camera. Background technique [0002] There are two mainstream methods in the field of visual distance measurement, one is laser distance measurement, and the other is binocular camera distance measurement. Among them, the laser ranging method uses a laser as a light source, and usually uses a laser sensor to simply measure the distance between the sensor and the target. Since the target image cannot be obtained, the feature points in the target image cannot be flexibly located. Among them, the binocular camera is more comprehensive in ranging, and the distance is calculated by analyzing the difference between the two pictures. However, binocular camera ranging requires camera calibration and two images to be processed. The pre-p...

Claims

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Application Information

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IPC IPC(8): G06T7/70G06T7/62G06T7/90
CPCG06T7/70G06T7/62G06T7/90
Inventor 江毅然于忠达董婷
Owner 青岛科美创视智能科技有限公司
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