CN1284961C - Plane measuring method based on single piece image - Google Patents
Plane measuring method based on single piece image Download PDFInfo
- Publication number
- CN1284961C CN1284961C CN 01140335 CN01140335A CN1284961C CN 1284961 C CN1284961 C CN 1284961C CN 01140335 CN01140335 CN 01140335 CN 01140335 A CN01140335 A CN 01140335A CN 1284961 C CN1284961 C CN 1284961C
- Authority
- CN
- China
- Prior art keywords
- plane
- template
- image
- scene
- measuring method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000013507 mapping Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000000284 extract Substances 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 230000035807 sensation Effects 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000007476 Maximum Likelihood Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013076 uncertainty analysis Methods 0.000 description 1
Images
Landscapes
- Image Analysis (AREA)
Abstract
The present invention relates to a plane measuring method based on single-piece images. The present invention comprises the following steps: placing A mould plate in the plane surface of a measured scene; photographing one or more pieces of images containing the mould plate in the measured scene; extracting known information of the mould plate from the images; working out mapping relation between a measured plane surface and an image plane; working out the coordinate value of any point and a distance between any two points in the scene according to the mapping relation. The measuring method of the present invention has no need of calibrating the parameter of a video camera and has the characteristics of convenience, practicability, high measuring precision, good robustness, etc.; therefore, measuring methods based on visual sensation are made practical.
Description
Technical field
The present invention relates to area of computer aided measures automatically.
Background technology
In our daily life and many fields, measure, particularly the measurement of point-to-point transmission is absolutely necessary in same plane, and such as traffic hazard, Crime Scene, buildings, working-yard etc. all need to carry out a large amount of surveying works.Classic method all is to adopt hand dipping, and this method is very consuming time, occurs bigger measuring error easily, and this measurement also produces iniquitous result because of the subjective factor of survey crew easily.
In recent years, along with the development and the application of computer vision, people begin to explore by computer vision methods, measure by image.In these class methods, comparatively being typically by two width of cloth or multiple image utilizes the method for stereoscopic vision to reconstruct the three-dimensional structure of tested scene, but this method relates to the classic problem of computer vision field, i.e. the practical application of coupling between multiple image, thereby very difficult input.Another kind method is the prior information at 4 above reference mark of manual measurement and come computer memory plane and the interplanar projection matrix of picture with this in the scene plane, measure by single image then, the measuring accuracy of this method and reference mark to choose precision, position and quantity directly related, but in actual applications, sometimes the reference mark is difficult to choose, and can't guarantee the measuring accuracy at reference mark.
Summary of the invention
The object of the present invention is to provide a kind of comparatively easy, practical and have a measuring method based on single image than high measurement accuracy and robustness.
For achieving the above object, the plane surveying method based on single image comprises step:
In tested scene plane, place one 0 plate;
Taking one or more in tested scene contains the image of described 0 plate and imports computing machine;
The straight line information that from image, extracts in the template to be comprised by automatic or man-machine interaction method;
Calculate tested plane and the interplanar mapping relations of picture;
Obtain in the scene coordinate figure of any and the distance of any point-to-point transmission arbitrarily according to these mapping relations.
Measuring method provided by the invention does not need camera parameters is demarcated, and has characteristics such as comparatively easy, practical, that measuring accuracy is high, robustness is good, makes based on the measuring method of vision and moves towards practical.
Description of drawings
Fig. 1 is several template synoptic diagram;
Fig. 2 is the process flow diagram of this measuring method;
Fig. 3 is the measurement scene graph of embodiment.
Embodiment
The present invention adopts a kind of simple and easy plane template, contain 4 or 4 above straight lines or line segment in this template, the big I of template is chosen suitable dimensions according to the size of tested scene, and the material of template is not had specific (special) requirements, and accompanying drawing 1 has provided several template instances commonly used.This template is placed in the tested scene plane, taking piece image with ordinary camera or digital camera can measure, and do not need camera parameters is demarcated, if can take multiple image from different perspectives, then can therefrom choose a width of cloth and measure or fully utilize same measured measured value in multiple image preferably so that improve measuring accuracy.
This method has been avoided the problem of choosing at reference mark effectively, directly utilize straight line information on the template with as interplanar mapping relations the time asking for tested plane, can improve measuring accuracy effectively, simplify the difficulty of Flame Image Process simultaneously, helped improving the automaticity of whole measuring process.For piece image, this method mainly comprises steps compositions such as Image Acquisition, template characteristic extraction, computational transformation matrix and measurement, and as shown in Figure 2, specifying of each step is as follows:
1. obtain image
This template is placed in the tested scene plane, takes the one or more image with ordinary camera or digital camera, and image is imported computing machine by scanner or some special purpose interface equipment.
2. template characteristic is extracted
From image, extract required Template Information by automatic or man-machine interaction method, i.e. straight line parameter on the template.Wherein, can detect the operator extraction marginal information, ask for the straight line parameter with methods such as Hough conversion or least square, maximum likelihood estimations then with edges such as Canny or Robert, Sobel.
3. computational transformation matrix
Straight line on the template that this method adopted or line segment information are measurable, and deposit its measurement parameter in computing machine.The image straight line that is extracted according to the straight line on the template or line segment and the 2nd step or the corresponding relation of line segment are obtained the mapping relations matrix M of scene plane to the plane of delineation.
4. measure
For on the image more arbitrarily, utilize the 3rd mapping relations inverse of a matrix conversion M that obtains of step
-1, just can obtain the coordinate figure of corresponding point in the scene, and then can calculate the distance of any point-to-point transmission in the scene.Simultaneously, can provide the error range of each measurement result according to uncertainty analysis to each step.
Embodiment
Be illustrated in figure 3 as the image of a tested scene, template is made up of two rectangles among the figure.According to the method described in the present invention, in image, extract eight limits of two rectangles automatically and calculate tested plane and the interplanar mapping relations of picture, in image,, just can utilize these mapping relations directly to obtain the distance of this point-to-point transmission the scene from image with optional 2 points of mouse.For example: D1, the true length of D2 is respectively 77.85cm and 189.78cm, be respectively 77.72cm and 191.02cm with the measured value that the inventive method drew, the relative error of measurement is respectively 0.17% and 0.65%, and this is can reach measuring accuracy fully to require.
Claims (3)
1. plane surveying method based on single image comprises step:
In tested scene plane, place a template;
Taking one or more in tested scene contains the image of described template and imports computing machine;
The straight line information that from image, extracts in the template to be comprised by automatic or man-machine interaction method;
Calculate tested plane and the interplanar mapping relations of picture;
Obtain in the scene coordinate figure of any and the distance of any point-to-point transmission arbitrarily according to these mapping relations.
2. by the described plane surveying method of claim 1, contain 4 or 4 above straight lines or line segment in the template that it is characterized in that being placed based on single image.
3. by the described plane surveying method of claim 2, it is characterized in that described straight line or line segment are the limits of planar graph, the figure that is produced as rectangle, square, triangle etc. and combination thereof based on single image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01140335 CN1284961C (en) | 2001-12-17 | 2001-12-17 | Plane measuring method based on single piece image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01140335 CN1284961C (en) | 2001-12-17 | 2001-12-17 | Plane measuring method based on single piece image |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1427245A CN1427245A (en) | 2003-07-02 |
| CN1284961C true CN1284961C (en) | 2006-11-15 |
Family
ID=4675806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01140335 Expired - Fee Related CN1284961C (en) | 2001-12-17 | 2001-12-17 | Plane measuring method based on single piece image |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1284961C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348948C (en) * | 2003-12-16 | 2007-11-14 | 湖南师范大学 | Image pickup range finder for field events and range finding method |
| CN101630409B (en) * | 2009-08-17 | 2011-07-27 | 北京航空航天大学 | Hand-eye vision calibration method for robot hole boring system |
| CN102589523A (en) * | 2011-01-11 | 2012-07-18 | 香港理工大学深圳研究院 | Method and equipments for remotely monitoring displacement of building |
-
2001
- 2001-12-17 CN CN 01140335 patent/CN1284961C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1427245A (en) | 2003-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Han et al. | Potential of big visual data and building information modeling for construction performance analytics: An exploratory study | |
| DE102015011914B4 (en) | Contour line measuring device and robotic system | |
| CN110838164B (en) | Monocular image three-dimensional reconstruction method, system and device based on object point depth | |
| Zollmann et al. | Interactive 4D overview and detail visualization in augmented reality | |
| CN108647677A (en) | The ammeter appearance and performance intelligent detecting method and device that view-based access control model calculates | |
| Lallensack et al. | Photogrammetry in ichnology: 3D model generation, visualisation, and data extraction | |
| KR20200031019A (en) | Depth data processing system capable of performing image registration on depth maps to optimize depth data | |
| CN109741325B (en) | Intelligent detection method for wiring verticality | |
| CN114638909A (en) | Substation semantic map construction method based on laser SLAM and visual fusion | |
| CN1224938C (en) | Method of measuring scene and geometric data of bodies inside the scene via single frame of image | |
| DE112007003553T5 (en) | Feature detection apparatus and method for measuring object distances | |
| CN107264570A (en) | steel rail light band distribution detecting device and method | |
| CN110660125A (en) | Three-dimensional modeling device for power distribution network system | |
| CN1284961C (en) | Plane measuring method based on single piece image | |
| CN115330712A (en) | Intelligent quality inspection method and system for prefabricated components of fabricated building based on virtual-real fusion | |
| CN116308185A (en) | Visual progress input and early warning method for constructional engineering | |
| CN114820563A (en) | Industrial component size estimation method and system based on multi-view stereo vision | |
| CN1288420C (en) | Single sight plane measuring method based on parallel lines | |
| CN101038156A (en) | Portable measuring system for surface three-dimensional appearance of rock | |
| CN1147651A (en) | Computer-aided traffic accident site surveying system | |
| DE4426355A1 (en) | Optical system for determining spatial position of object | |
| Morena | Application of Action Camera Video for Fast and Low-Cost Photogrammetric Survey of Cultural Heritage | |
| Nguatem et al. | Automatic Generation of Building Models With Levels of Detail 1-3 | |
| Ma | Research on calculation strategy of perimeter of irregular objects | |
| CN113487679B (en) | Visual ranging signal processing method for automatic focusing system of laser marking machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061115 Termination date: 20171217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |