CN106225673A - A kind of machine vision metrology method of ancient building apparent size - Google Patents
A kind of machine vision metrology method of ancient building apparent size Download PDFInfo
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- CN106225673A CN106225673A CN201610713671.1A CN201610713671A CN106225673A CN 106225673 A CN106225673 A CN 106225673A CN 201610713671 A CN201610713671 A CN 201610713671A CN 106225673 A CN106225673 A CN 106225673A
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- ancient building
- characteristic point
- apparent size
- coordinate
- external appearance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of machine vision metrology method of ancient building apparent size, said method comprising the steps of: S1: extract ancient building external appearance characteristic point；S2: set up coordinate transformation method；S3: measure ancient building apparent size；Achieving the contactless multi-angle telemeasurement of ancient building apparent size on the basis of ensureing certain certainty of measurement, this will assist in the efficiency improving semblance measure, thus the research of relevant archaeological, culture protection brings facility.
Description
Technical field
The invention belongs to machine vision metrology field, be specifically related to the machine vision metrology side of a kind of ancient building apparent size
Method.
Background technology
Multiple fields such as the measurement of the concrete numerical value of apparent size of ancient building is protected for the reconstruction of ancient building, archaeology analysis
Significant.Measure by conventional art and need to put into substantial amounts of manpower and materials, can examine to reduce manpower and materials
Consider introducing machine vision to measure accordingly.It addition, traditional measuring method is contact type measurement, such metering system pair
Irreversible destruction is easily caused in important ancient building outward appearance, and time and effort consuming.In some cases, due to geographical conditions
Limiting, in the case of not removing surrounding enviroment, some ancient building is the most effectively to measure.So, ancient building
The difficulty of the ancient building open air measurement developing protection the most completely is the highest, is easily subject to the environment such as landform, weather
Limit.
Accordingly, it would be desirable to the method that ancient building apparent size is measured by introducing machine vision technique is to avoid time-consuming expense
Power, reduces and measures cost, Study of Lifting level.Especially for distribution mountain forest, field is discarded and does not carries out the Gu of protective development
Building, can reduce the impact on measuring of the factor such as landform, weather, thus bring practicality to archaeology, the research of culture protection
Property and science, allow modern times people can more intuitively understand ancient building.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide the machine vision metrology of a kind of ancient building apparent size
Method, improves the efficiency of semblance measure, thus the research of relevant archaeological, culture protection brings facility.
A kind of machine vision metrology method of ancient building apparent size, said method comprising the steps of:
S1: extract ancient building external appearance characteristic point；
S2: set up coordinate transformation method；
S3: measure ancient building apparent size.
Preferably, described S1, particularly as follows: manually mark external appearance characteristic point in the picture, obtains characteristic point by computer and exists
Position coordinates in image, thus complete the extraction of ancient building external appearance characteristic point.
Preferably, described S2 particularly as follows: with the positional information of characteristic point in image coordinate system for input, with actual measuring surface
The position coordinates system of middle characteristic point is output, introduces these mapping relations of Neural Network Optimization, thus sets up dependent coordinate and convert
Method；Due to the relative distance of video camera and the actual measuring surface of ancient building and angle, there is some difference, according to different distance and
Angle sets up multiple coordinate transformation method accordingly.
Preferably, described S3 particularly as follows: reality measure in, according to ancient building measuring surface position relative with video camera institute
The scope at place, selects corresponding coordinate transformation method；Use this method for transformation, the ancient building external appearance characteristic point coordinates that will extract
Be converted to actual position coordinate；The apparent size of ancient building is calculated further according to actual position coordinate.
Technical scheme has the advantages that
The machine vision metrology method of a kind of ancient building apparent size that the present invention provides, on the basis ensureing certain certainty of measurement
On achieve the contactless multi-angle telemeasurement of ancient building apparent size, this will assist in the efficiency improving semblance measure,
Thus the research of relevant archaeological, culture protection brings facility.
Detailed description of the invention
In order to have a clear understanding of technical scheme, its detailed structure be will be set forth in the description that follows.Obviously, originally
The concrete also deficiency of implementing of inventive embodiments is limited to the specific details that those skilled in the art is familiar with.The present invention's is preferred real
Execute example to be described in detail as follows, in addition to these embodiments described in detail, it is also possible to there is other embodiments.
Below in conjunction with embodiment, the present invention is described in further details.
The technical scheme that patent of the present invention uses divides 3 steps:
S1: extract ancient building external appearance characteristic point；In order to measure the apparent size of ancient building, it is necessary first to bright in ancient building image
The really external appearance characteristic point of ancient building.The artificial external appearance characteristic point that marks in the picture, then obtain characteristic point at image by computer
In position coordinates, thus complete the extraction of ancient building external appearance characteristic point.
S2: set up coordinate transformation method；Theoretical according to existing image procossing, captured image is likely to occur distortion,
Particularly when the normal direction of camera lens measures surface off plumb with ancient building time, such distortion can be amplified further.By sky
Gas and the restriction of geographical conditions, in some ancient buildings not being adequately protected exploitation are measured, basically can not ensure mirror
The normal method phase of head is vertical with the surface that ancient building need to be measured.
For this problem, this patent proposes to be set up the mapping of image coordinate system and actual coordinates by camera calibration
Relation.In image coordinate system, the positional information of characteristic point is input, with the position coordinates system of characteristic point in actual measuring surface is
Output, introduces these mapping relations of Neural Network Optimization, thus sets up dependent coordinate method for transformation.Due to video camera and ancient building
There is some difference for the relative distance of actual measuring surface and angle, sets up multiple coordinate accordingly according to different distance and angle and turns
Change method.
S3: measure ancient building apparent size.
In reality is measured, first according to ancient building measuring surface and the scope residing for the relative position of video camera, select phase
The coordinate transformation method answered.Use this method for transformation, the ancient building external appearance characteristic point coordinates of extraction is converted to physical location
Coordinate.The apparent size of ancient building is calculated further according to actual position coordinate
The present embodiment also measures as a example by gate tower, east gate, Liuzhou city, Guangxi province arched door distance from bottom.Enter at 8 diverse locations
Row vision measurement, have chosen different coordinate transformation relations at diverse location respectively according to distance and the angle of video camera.Choose
Coordinate transformation relation in characteristic point to change the mean error of coordinate position be 3.4%, in the survey of gate tower, east gate arched door distance from bottom
In amount, contrasting with manual measurement value, the maximum error that 8 times are measured is 6%.This shows that this method can be accurately at different angles
The vision measurement of ancient building apparent size is carried out under degree.
The machine vision metrology method of a kind of ancient building apparent size that the present invention provides, is ensureing certain certainty of measurement
On the basis of achieve the contactless multi-angle telemeasurement of ancient building apparent size, this will assist in the effect improving semblance measure
Rate, thus the research of relevant archaeological, culture protection brings facility.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit, although ginseng
Being described in detail the present invention according to above-described embodiment, those of ordinary skill in the field still can be to the present invention's
Detailed description of the invention is modified or equivalent, and these are without departing from any amendment of spirit and scope of the invention or equivalent
Replace, all within the claims that application is awaited the reply.
Claims (4)
1. the machine vision metrology method of an ancient building apparent size, it is characterised in that said method comprising the steps of:
S1: extract ancient building external appearance characteristic point；
S2: set up coordinate transformation method；
S3: measure ancient building apparent size.
The method carrying out field leading line characteristic point Gross Error Detection based on different fitting a straight lines the most according to claim 1,
It is characterized in that, described S1, particularly as follows: manually mark external appearance characteristic point in the picture, obtains characteristic point at image by computer
In position coordinates, thus complete the extraction of ancient building external appearance characteristic point.
The method carrying out field leading line characteristic point Gross Error Detection based on different fitting a straight lines the most according to claim 1,
It is characterized in that, described S2 particularly as follows: with the positional information of characteristic point in image coordinate system for input, with in actual measuring surface spy
Levying position coordinates system a little is output, introduces these mapping relations of Neural Network Optimization, thus sets up dependent coordinate method for transformation；
Due to video camera and the relative distance of the actual measuring surface of ancient building and angle, there is some difference, according to different distance and angle phase
That answers sets up multiple coordinate transformation method.
The method carrying out field leading line characteristic point Gross Error Detection based on different fitting a straight lines the most according to claim 1,
It is characterized in that, described S3 is particularly as follows: in reality is measured, according to residing for ancient building measuring surface and the relative position of video camera
Scope, selects corresponding coordinate transformation method；Use this method for transformation, the ancient building external appearance characteristic point coordinates conversion that will extract
For actual position coordinate；The apparent size of ancient building is calculated further according to actual position coordinate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990675A (en) * | 2019-04-18 | 2019-07-09 | 内蒙古工业大学 | Ancient architecture measuring scale |
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| CN104034514A (en) * | 2014-06-12 | 2014-09-10 | 中国科学院上海技术物理研究所 | Large visual field camera nonlinear distortion correction device and method |
| CN104296665A (en) * | 2014-09-28 | 2015-01-21 | 苏州镭络视觉技术有限公司 | Workpiece size measuring method and system based on machine vision |
| CN105783770A (en) * | 2016-01-22 | 2016-07-20 | 西南科技大学 | Method for measuring ice shaped contour based on line structured light |
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2016
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| US20050216207A1 (en) * | 2004-03-24 | 2005-09-29 | Illumina, Inc. | Artificial intelligence and global normalization methods for genotyping |
| CN102033509A (en) * | 2011-01-18 | 2011-04-27 | 上海交通大学 | Virtual error compensation system of numerical control machine |
| CN104034514A (en) * | 2014-06-12 | 2014-09-10 | 中国科学院上海技术物理研究所 | Large visual field camera nonlinear distortion correction device and method |
| CN104296665A (en) * | 2014-09-28 | 2015-01-21 | 苏州镭络视觉技术有限公司 | Workpiece size measuring method and system based on machine vision |
| CN105783770A (en) * | 2016-01-22 | 2016-07-20 | 西南科技大学 | Method for measuring ice shaped contour based on line structured light |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109990675A (en) * | 2019-04-18 | 2019-07-09 | 内蒙古工业大学 | Ancient architecture measuring scale |
| CN109990675B (en) * | 2019-04-18 | 2021-06-29 | 内蒙古工业大学 | Ancient building measuring scale |
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Application publication date: 20161214 |