A device and method for obtaining 3D coordinates and dimensions of objects during motion

Abstract

The embodiment of the present invention provides a collection device and method in 3D modeling, (1) using the collection device to collect multiple images of the target object; (2) the calibration device to obtain the position and location of the collection device when the collection device collects each image Attitude information; (3) The processor synthesizes the 3D model of the target object according to the above-mentioned multiple images, and at the same time obtains the 3D coordinates corresponding to the image points with the same name according to the position and posture information of the acquisition device, thereby obtaining a 3D model point cloud with accurate 3D coordinates. The absolute size calibration of the target object is realized through the method of obtaining the camera position and attitude, and the calculation method of the image point of the same name is adopted, so there is no need to place the calibration object on the target object in advance, or project the calibration point.

Description

technical field [0001] The invention relates to the technical field of shape measurement, in particular to the technical field of 3D shape measurement. Background technique [0002] At present, when using a visual method for 3D acquisition and measurement, the camera is usually rotated relative to the target object, or multiple cameras are set around the target object for simultaneous acquisition. For example, the DigitaL EmiLy project of the University of Southern California uses a spherical bracket to fix hundreds of cameras at different positions and angles on the bracket to achieve 3D acquisition and modeling of the human body. However, in either way, the distance between the camera and the target object needs to be short, at least within the range that can be arranged, so that the camera can collect images of the target object at different positions. [0003] However, in some applications, it is not possible to collect images around the target object. For example, whe...

AI Technical Summary

Problems solved by technology

However, in practical applications, it is found that unless there is an accurate angle measurement device, the user is not sensitive to the angle, and it is difficult to determine the angle accurately; the size of the target object is difficult to accurately determine, such as the scene constructed by the 3D model of the above-mentioned riverside house

And the measurement error leads to the camera position setting error, which will affect the acquisition and synthesis speed and effect; the accuracy and speed need to be further improved

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