Mixed-precision scanning method and system

A scanning method and high-precision technology, applied in the field of three-dimensional information, can solve the problems of high scanning density, low efficiency, and long scanning time, and achieve the effects of improving scanning accuracy, improving scanning efficiency, and reducing costs

Inactive Publication Date: 2018-03-06
林嘉恒
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a relatively complete scan result can be obtained, it is still unable to restore the local detailed shape
Using high-density scanning, although a complete scan result with a high degree of restoration can be obtained, due to the very high scanning density, the scanning takes a long time and the efficiency is very low

Method used

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  • Mixed-precision scanning method and system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] figure 2 It is a flow chart of the mixed-precision scanning method provided by Embodiment 1 of the present invention.

[0075] refer to figure 2 , the mixed-precision scanning method includes the following steps:

[0076] In step S110, the target object is divided into regions according to the physical characteristics to obtain distributed scanning regions;

[0077] Step S120, performing hierarchical splitting on the distributed scanning area according to the local structural features to obtain the stepped scanning area;

[0078] Specifically, for the actual target object to be scanned, individual and complex local details generally exist in the physical characteristics. According to the local characteristics and complexity, the target object is divided into regions, and the divided distributed scanning regions include the overall structure and multiple Local structure; according to the local structure characteristics, the distributed scanning area is divided into ...

Embodiment 2

[0090] Figure 5 It is a flowchart of a method for constructing a mixed-precision scanning framework provided by Embodiment 2 of the present invention.

[0091] According to the first step-like shooting distance method, refer to Figure 5 , step S130 in the mixed-precision scanning method, the camera is mounted according to the stepped scanning area, and the construction of the mixed-precision scanning framework includes the following steps:

[0092] Step S210, obtaining multiple shooting distances according to the stepped scanning area;

[0093] Step S220, carrying cameras of different levels according to multiple shooting distances, thereby constructing scanning frames of different densities;

[0094] Step S230, constructing a mixed-precision scanning frame according to scanning frames of different densities.

[0095] Specifically, the multiple shooting distances include at least two groups, and generally three groups are used, namely: the first shooting distance, the sec...

Embodiment 3

[0103] Figure 11 It is a flowchart of a method for constructing a mixed-precision scanning framework provided by Embodiment 3 of the present invention.

[0104] According to the second hierarchical focal length method, refer to Figure 11 , the step S130 in the mixed-precision scanning method is to mount the camera according to the stepped scanning area, and constructing the mixed-precision scanning framework may also include the following steps:

[0105] Step S310, obtaining multiple shooting focal lengths according to the stepped scanning area;

[0106] In step S320, cameras with different focal lengths are equipped according to multiple shooting focal lengths, so as to construct second scanning frames with different densities;

[0107] Step S330, constructing a mixed-precision scanning frame according to second scanning frames of different densities.

[0108] Specifically, the multiple shooting focal lengths include at least two groups, and generally three groups are us...

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Abstract

The invention provides a mixed-precision scanning method and system, and relates to the field of three-dimensional information technology. The method includes: carrying out area division on a target object according to body shape features to obtain a distributed scanning area; carrying out hierarchical splitting on the distributed scanning area according to local structure features to obtain a stepped scanning area; mounting cameras according to the stepped scanning area, and constructing a mixed-precision scanning framework; scanning the target object in the mixed-precision scanning frameworkto obtain a scanning photograph sequence; and carrying out calculation on the scanning photograph sequence to generate a point cloud matrix of three-dimensional space. The method can reduce costs andimprove scanning efficiency.

Description

technical field [0001] The invention relates to the technical field of three-dimensional information, in particular to a mixed-precision scanning method and system. Background technique [0002] At present, the common three-dimensional scanning technology based on the principle of photogrammetry (photogrammetry) in the market is to extract the three-dimensional space information of the pixels in the photo sequence through a specific algorithm, similar to the reverse algorithm of the camera. In the process of scanning the target object, the complexity of the structure of the object to be scanned is different, and the required acquisition accuracy is also different. Common solutions currently on the market, such as figure 1 As shown, different scanning devices are designed with the indicators of low precision, medium precision and high precision, and each device can only work with a single scanning precision. In order to obtain a higher level of scanning accuracy, it is nece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/55G01B11/00G06T15/04G06T17/00
CPCG01B11/00G06T7/55G06T15/04G06T17/00G06T2200/08G06T2207/10148
Inventor 林嘉恒
Owner 林嘉恒
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