A long-distance calibration method in 3D modeling

A calibration method, 3D technology, applied in 3D modeling, image analysis, details involving processing steps, etc., can solve problems such as angle insensitivity, camera position setting error, and difficulty in accurately determining angles, so as to improve synthesis accuracy, Improve synthesis speed and improve adaptability

Active Publication Date: 2021-06-15
天目爱视(北京)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • A long-distance calibration method in 3D modeling
  • A long-distance calibration method in 3D modeling
  • A long-distance calibration method in 3D modeling

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Embodiment Construction

[0046] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0047] 3D Acquisition Calibration Process

[0048] Please refer to Figure 1-Figure 3 , when the target to be collected is B, then calibration object A can be placed around B, but in many cases calibrator A cannot be placed near target B. At this point you can:

[0049] (1) Select a distance away from target B to set calibration object A.

[0050] (2) Take an image of the calibration object A with the acquisition device.

[0...

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Abstract

The present invention provides a calibration method in 3D modeling, (1) collect the image of object A; (2) move and / or rotate the collection device until object B enters the collection range, during the movement and / or rotation process of the collection device (3) Collect images of object B; where object A and object B are not in the field of view of the acquisition device at the same time; object A is the calibration object, and object B is the target object; or object A is the target object , the object B is the calibration object; there are multiple calibration points on the calibration object; the coordinates of the target object are calibrated according to the coordinates of the multiple calibration points. Absolute size calibration of long-distance target objects is achieved by continuous shooting during movement or rotation.

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, and hundreds of cameras are fixed at different positions and angles on the bracket, so as to realize 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. F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/80G06T17/00G06T19/00
CPCG06T17/00G06T19/00G06T2200/08G06T2207/10028G06T7/85
Inventor 左忠斌左达宇
Owner 天目爱视(北京)科技有限公司
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