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Camera used in 3D acquisition system and camera selection method

A 3D, information collection technology, applied in the direction of using optical devices, measuring devices, instruments, etc., to achieve the effect of strong applicability, improved synthesis speed, and improved synthesis accuracy

Active Publication Date: 2020-04-10
天目爱视(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no one has considered how to choose a suitable camera from the perspective of 3D synthesis.

Method used

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  • Camera used in 3D acquisition system and camera selection method
  • Camera used in 3D acquisition system and camera selection method
  • Camera used in 3D acquisition system and camera selection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: 3D system for collecting by relative motion of camera and target

[0035] An embodiment of the present invention provides an image acquisition device for 3D information acquisition, including an image acquisition device and a rotating device. The image acquisition device is used to collect a group of images of the target object through the relative movement between the acquisition area of ​​the image acquisition device and the target object; the acquisition area moving device is used to drive the acquisition area of ​​the image acquisition device and the target object to generate relative motion. The collection area is the effective field of view range of the image collection device.

[0036] Please refer to figure 1 , the target object 1 is fixed on the stage 2 , and the rotating device 3 drives the image acquisition device 4 to rotate around the target object 1 . The rotating device 3 can drive the image acquisition device 4 to rotate around the tar...

Embodiment 2

[0044] Embodiment 2: 3D system for collecting by multiple fixed-position cameras

[0045] There is also a 3D acquisition system such as figure 2 , 3 , including a plurality of image acquisition devices 4 whose positions are relatively fixed, for example, on a circular support 5, a plurality of image acquisition devices 4 are fixed along the circumference, and their optical axes are all toward the center of the circular support. Of course, the above description is only for ease of understanding. It is conceivable that the bracket is not necessarily a complete circle. For example, when only a part of the 3D model of the target is required, such as image 3 , the bracket can be part of an arc. Moreover, there is not necessarily only one bracket, and there may be multiple brackets, and each bracket has a certain number of cameras, so that the cameras form a two-dimensional distribution in space.

[0046] In this case, the distance between the cameras has been fixed by the br...

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Abstract

The invention provides an image acquisition device for 3D information acquisition and a selection method thereof. The image acquisition device is applied to 3D information acquisition equipment. The 3D information acquisition equipment comprises an acquisition area moving device used for driving an acquisition area of the image acquisition device to move relative to a target object, and the imageacquisition device used for acquiring a group of images of the target object through the relative movement, wherein the image acquisition device satisfies a preset condition. The invention proposes for the first time that the synthesis speed and the synthesis precision are improved simultaneously by selecting an appropriate camera; and when the camera is selected, angle measurement and target sizemeasurement are not needed, so that the applicability is higher.

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] On the one hand, when performing 3D measurement, 3D information needs to be collected first. The currently commonly used methods include using machine vision to collect pictures from different angles of objects, and matching and splicing these pictures to form a 3D model. When collecting pictures from different angles, multiple cameras can be set at different angles of the object to be tested, and pictures can also be collected from different angles by rotating a single or multiple cameras. But no matter which of these two methods, it involves the problems of synthesis speed and synthesis accuracy. To some extent, the synthesis speed and synthesis accuracy are a pair of contradictions. The increase of the synthesis speed will lead to the decrease of the final 3D synthesis accuracy; to improve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01B11/24
CPCG01B11/00G01B11/24
Inventor 左忠斌左达宇
Owner 天目爱视(北京)科技有限公司
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