CN105806265A - Method for measuring ground coverage through mobile phone - Google Patents
Method for measuring ground coverage through mobile phone Download PDFInfo
- Publication number
- CN105806265A CN105806265A CN201610172396.7A CN201610172396A CN105806265A CN 105806265 A CN105806265 A CN 105806265A CN 201610172396 A CN201610172396 A CN 201610172396A CN 105806265 A CN105806265 A CN 105806265A
- Authority
- CN
- China
- Prior art keywords
- mobile phone
- cover degree
- designated
- ground
- vegetation
- 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.)
- Pending
Links
Classifications
-
- 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
- G01B11/28—Measuring arrangements characterised by the use of optical techniques for measuring areas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
- G01C11/04—Interpretation of pictures
Abstract
The invention discloses a method for measuring ground coverage through a mobile phone.The method comprises the steps that on the premise that any mobile phone camera with the camera focal length not needing to be known carries out photographing in the vertical direction, a marking point is placed for a ground block with the coverage to be measured, and an area corresponding to the marking point is reserved in a photo; finally, the number of pixels of the photo is observed and counted.According to the meaning of the ground coverage, the ground coverage of the ground block is calculated through substitution.According to the method, the focal length of the mobile phone camera does not need to be known, equipment is easy and convenient to operate, and the method is easy to implement.
Description
One, technical field
The present invention relates to a kind of mobile phone and measure the method, particularly a kind of method carrying out photographing without known camera focus of ground cover degree problem.
Two, technical background
Up to the present, cover degree problem in ground mainly takes portable shape vegetation cover degree photographic apparatus etc., although this method is widely used, but in actual mechanical process, there are some and inevitably bother:
1. workload is big, and efficiency is low；
2. instrument carries still easy not.
Three, summary of the invention
In order to overcome a lot of troubles and error inevitably brought in the cover degree observation process of existing ground, it is an object of the invention to provide a kind of method that mobile phone measures ground cover degree problem.
The object of the present invention is achieved like this:
1, a kind of method that mobile phone measures ground cover degree problem, first, certain point in direction of advance is photographed with any mobile phone camera (without known camera focus), and wherein mobile phone to keep vertical；Secondly, the plot placement 4 of cover degree to be determined is clicked on line flag, and 4 points are carried out line, connect into tetragon；Then, the photo shot by mobile phone camera imports image processing software, retains district to be determined according on the spot four some labellings；Then, observing and count photo has how many pixels to be designated as N, and counting belongs to the pixel n that vegetation is blocked simultaneously, wherein has vegetation to block and is designated as 1, blocks without vegetation and be designated as 0；Finally, base area cover degree defines, and substitutes into and calculates this ground, plot cover degree.
This invention has the advantage that
1. mobile phone is utilized and without known camera focus, more portable；
2. in hgher efficiency, workload is less.
Four, detailed description of the invention:
The method of a kind of mobile phone mensuration ground cover degree problem unlike the prior art, has done significant improvement, specifically:
1) a kind of method resolving camera Calibration element without photo control point: first, certain point in direction of advance is photographed with any mobile phone camera (without known camera focus), and wherein mobile phone to keep vertical；Secondly, the plot placement 4 of cover degree to be determined is clicked on line flag, and 4 points are carried out line, connect into tetragon；Then, the photo shot by mobile phone camera imports image processing software, retains district to be determined according on the spot four some labellings；Then, observing and count photo has how many pixels to be designated as N, and counting belongs to the pixel n that vegetation is blocked simultaneously, wherein has vegetation to block and is designated as 1, blocks without vegetation and be designated as 0；Finally,.
2) a kind of mobile phone measures the calculation method of the method for ground cover degree problem:
1. certain point of direction of advance carries out the photography of vertical direction with any mobile phone camera without known camera focus；
2. the plot of cover degree to be determined is placed 4 labelling points, and is carried out line formation tetragon；
3. district to be determined is retained according on the spot 4 labelling point labellings after the photo of shooting being imported image processing software；
4. observe and count photo pixel number, be designated as N, observe simultaneously and counting belongs to the pixel n that vegetation is blocked, wherein have vegetation to block and be designated as 1, block without vegetation and be designated as 0；
5. base area cover degree formula, substitutes into and calculates this ground, plot cover degree.
Claims (2)
1. the method that mobile phone measures ground cover degree problem, is characterized in that: first, photographs with any mobile phone camera (without known camera focus) at certain point；Secondly, the plot of cover degree to be determined is placed into line flag；Then, the image that mobile phone camera shoots is retained district to be determined according to the point of labelling on the spot；Then, observing and count photo has how many pixels to be designated as N, and counting belongs to the pixel n that vegetation is blocked simultaneously；Finally, base area cover degree defines, and substitutes into and calculates this ground, plot cover degree.
2. the method measuring ground cover degree problem according to claim 1 mobile phone, is characterized in that: first, carries out the photography of vertical direction with any mobile phone camera without known camera focus at certain point of direction of advance；Secondly, 4 labelling points are placed in the plot of cover degree to be determined, and is carried out line formation tetragon；Then, the photo of shooting is opened and preserved, retain district to be determined according on the spot 4 labelling point labellings；Then, observe and count photo pixel number, one of them complete pixel be designated as 1 more than half pixel, not enough half does not count, and sum is designated as N, observes by similar fashion simultaneously and counts and belongs to the pixel n that vegetation is blocked, wherein there is vegetation to block and be designated as 1, block without vegetation and be designated as 0；Finally, the implication of base area cover degree, substitute into and calculate this ground, plot cover degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172396.7A CN105806265A (en) | 2016-03-24 | 2016-03-24 | Method for measuring ground coverage through mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172396.7A CN105806265A (en) | 2016-03-24 | 2016-03-24 | Method for measuring ground coverage through mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105806265A true CN105806265A (en) | 2016-07-27 |
Family
ID=56454262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610172396.7A Pending CN105806265A (en) | 2016-03-24 | 2016-03-24 | Method for measuring ground coverage through mobile phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105806265A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109190634A (en) * | 2018-07-18 | 2019-01-11 | 南昌大学 | A kind of method of the efficient measurement hidden degree of Bird's Nest |
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| US7639842B2 (en) * | 2002-05-03 | 2009-12-29 | Imagetree Corp. | Remote sensing and probabilistic sampling based forest inventory method |
| CN101832769A (en) * | 2010-03-30 | 2010-09-15 | 中国农业大学 | Method and system for estimating vegetation coverage degree in diggings based on close-up photography |
| CN102288954A (en) * | 2011-08-01 | 2011-12-21 | 高吉喜 | Remote sensing estimation method for vegetation coverage of grassland |
| CN104142142A (en) * | 2014-07-01 | 2014-11-12 | 北京师范大学 | Method for estimating global vegetation coverage |
| CN105069398A (en) * | 2015-07-10 | 2015-11-18 | 南京信息工程大学 | Grassland coverage-degree extraction method based on mobile phone camera |
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2016
- 2016-03-24 CN CN201610172396.7A patent/CN105806265A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7639842B2 (en) * | 2002-05-03 | 2009-12-29 | Imagetree Corp. | Remote sensing and probabilistic sampling based forest inventory method |
| CN101303761A (en) * | 2008-06-10 | 2008-11-12 | 裘炅 | Integrated system for claim settlement of vehicle insurance capable of shooting and uploading evidence-obtaining photograph or video by mobile phone |
| CN101832769A (en) * | 2010-03-30 | 2010-09-15 | 中国农业大学 | Method and system for estimating vegetation coverage degree in diggings based on close-up photography |
| CN102288954A (en) * | 2011-08-01 | 2011-12-21 | 高吉喜 | Remote sensing estimation method for vegetation coverage of grassland |
| CN104142142A (en) * | 2014-07-01 | 2014-11-12 | 北京师范大学 | Method for estimating global vegetation coverage |
| CN105069398A (en) * | 2015-07-10 | 2015-11-18 | 南京信息工程大学 | Grassland coverage-degree extraction method based on mobile phone camera |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109190634A (en) * | 2018-07-18 | 2019-01-11 | 南昌大学 | A kind of method of the efficient measurement hidden degree of Bird's Nest |
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Application publication date: 20160727 |
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| WD01 | Invention patent application deemed withdrawn after publication |