Method, apparatus and system for determining world coordinates of an object point in an image

Abstract

The present invention provides a method, device and system for determining the world coordinates of a target point in an image. The method includes: acquiring an image to be processed and a world coordinate system map corresponding to the image, and performing corner point analysis on the image and the map respectively. The first result and the second result are obtained by detection; the first result and the second result are matched to obtain the corresponding relationship between the corner position in the image and the corner position in the map; the pixel coordinates of the target point in the image are obtained, based on The correspondence is calculated to obtain the world coordinates corresponding to the pixel coordinates. The method, device, system and storage medium of the present invention obtain the corner point correspondence between the image and the map by performing corner point detection and corner point matching on the image captured by the camera and the world coordinate system map corresponding to the image, based on the The corner point correspondence can quickly obtain the world coordinates corresponding to any target point in the image, without the need to calibrate the camera, saving a lot of time and manpower.

Description

technical field [0001] The present invention relates to the technical field of video structuring, and more particularly relates to a method, device, system and storage medium for determining the world coordinates of a target point in an image. Background technique [0002] In the process of video structuring, if it is necessary to obtain the position of the object in the video / image in the world coordinate system, it is necessary to calibrate the camera that captures the video / image. The existing camera calibration methods require special calibration boards and tools, and require operators to operate on site, which is very time-consuming and labor-intensive, and requires calibration operations for each installed camera, which is even more inefficient. Contents of the invention [0003] The present invention proposes a solution for determining the world coordinates of the target point in the image, which obtains the coordinates between the image and the map by performing co...

AI Technical Summary

Problems solved by technology

The existing camera calibration method requires special calibration boards and tools, and requires operators to operate on site, which is very time-consuming and manpower-consuming, and requires calibration operations for each installed camera, which is even more inefficient.

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