CN110443844A - A kind of rock mass discontinuity Picking up geometry information method based on borehole image - Google Patents
A kind of rock mass discontinuity Picking up geometry information method based on borehole image Download PDFInfo
- Publication number
- CN110443844A CN110443844A CN201910552020.2A CN201910552020A CN110443844A CN 110443844 A CN110443844 A CN 110443844A CN 201910552020 A CN201910552020 A CN 201910552020A CN 110443844 A CN110443844 A CN 110443844A
- Authority
- CN
- China
- Prior art keywords
- structural plane
- edge
- line
- image
- borehole image
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/13—Edge detection
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/181—Segmentation; Edge detection involving edge growing; involving edge linking
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/40—Analysis of texture
- G06T7/41—Analysis of texture based on statistical description of texture
- G06T7/45—Analysis of texture based on statistical description of texture using co-occurrence matrix computation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20021—Dividing image into blocks, subimages or windows
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30181—Earth observation
- G06T2207/30184—Infrastructure
Abstract
The rock mass discontinuity Picking up geometry information method based on borehole image that the present invention provides a kind of, borehole image is obtained first, cutting preliminary treatment is carried out to image, structural plane region is determined by gray level co-occurrence matrixes again, edge detection is carried out to determining region, edge connection, edge fitting, the geological information of structural plane is finally calculated, it is computationally intensive that present invention improves the prior arts, and calculating speed is slow, it is fitted the problems such as not accurate enough, first fitting structural plane edge is proposed, then carries out the new approaches of structural plane parameter calculating, there is great practical value.
Description
Technical field
The invention belongs to the structural plane field of measuring technique in engineering geological investigation field, and in particular to one kind is based on drill drawing
The method of the rock mass discontinuity Picking up geometry information of picture.
Background technique
It is certain structural that the structural plane developed inside rock mass not only shows rock mass, while also directly affecting rock mass
Mechanical characteristics and seepage flow characteristics.Due to the presence of structural plane, rock mass show apparent inhomogeneity, noncontinuity and it is each to
The features such as anisotropic, structural plane all have strong influence to the property of rock mass various aspects.Therefore, how accurate quick obtaining rock mass
The geological information in internal structure face is always the hot issue of geotechnical engineering Yu engineering geology area research.
The acquisition of rock mass discontinuity geological information can be divided into contact and non-contact measurement two major classes.Contact type measurement includes
Current widely used scan line method and survey window method have professional standing and experience, the knot of acquisition due to being artificial directly measurement
Structure face information is relatively accurate comprehensive and low in cost, but the disadvantage is that heavy workload, the duty cycle is long, human error is larger etc..Most
Importantly, for rock mass inside not exposure in the structural plane on surface, contact type measurement can not.In recent years, with photoelectric measurement
Technology rapid progress, and the contactless measurement of various new is developed, such as under-mine TV, photogrammetric and three-dimensional laser
Scanning technique etc., the wherein not too many research achievement of this domain variability of under-mine TV measurement structure face.A kind of " borehole image knot
How structure face automatic identification and parameter extracting method " (publication number: CN104915640A) be more detailed elaborates from drill drawing
Structural plane is identified as in and accurately obtains the geological information of structural plane, and this method is sieved using stencil function matching characteristic point
Optimal function is selected, can preferably identify structural surface information, but because this method needs are found most by repeatedly matching
Major function, so calculating, the time is long, and anti-interference ability is also poor.Therefore, how quickly to identify structural plane and obtain accurately
Structural plane geological information is that current borehole image obtains structural surface information urgent problem to be solved.
Summary of the invention
Presently, there are aiming at the problem that, the present invention provides a kind of, and the rock mass discontinuity geological information based on borehole image mentions
The method taken keeps the acquisition of structural plane geological information more quick and accurate, and operation is realized also simpler.
The present invention solves its technical problem, the used rock mass discontinuity Picking up geometry information side based on borehole image
Method comprises the following steps:
S1, borehole image is obtained；
S2, the borehole image of acquisition is cut, is cut into the subgraph that multiple suitable scan box are scanned；
S3, subgraph is scanned respectively by scan box, to orient structural plane location in each subgraph
Domain；
S4, edge detection is carried out to the structural plane region extracted, detects the edge where structural plane；
S5, it is connected by the marginal point that edge linking algorithm will test out, obtains edge line；
S6, fitting edge line, obtain calculating parameter, to calculate the geological information of structural plane in each subgraph, wrap
It includes:
Obtained edge line is fitted using following formula, so that it is determined that three parameter i out0, A and θ:
Wherein, i is pixel line number, and j is pixel columns, and N is every a line pixel sum, i0For sine curve center
Line line number；
Then A and θ are brought into following formula, obtains structural plane tendency α, angle of inclination beta, to obtain the geometry letter of structural plane
Breath:
Wherein, the resolution ratio of K borehole image depth direction, D are borehole image pore sizes.
Further, in the rock mass discontinuity Picking up geometry information method of the invention based on borehole image, step S3
Specifically comprise the following steps:
S31, the longitudinal width W for defining scan box, and set laterally wide with subgraph for the transverse width of scan box
Degree is consistent；
S32, first gray scale that image in frame is obtained when scan box top edge is overlapped with subgraph the first row pixel
Co-occurrence matrix, scan box move down line by line, and every mobile a line is obtained according to the gray level co-occurrence matrixes for obtaining image in a frame, until subgraph
As scanned；Meanwhile contrast, energy after obtaining gray level co-occurrence matrixes, after calculating separately out each gray level co-occurrence matrixes
Amount and consistency；
S33, the variation location structure face region according to contrast, energy and consistency.
Further, in the rock mass discontinuity Picking up geometry information method of the invention based on borehole image, step S33
Positioning principle are as follows:
As scan box moves down line by line, if not including structural plane, three parameters retinue base of image is not originally sent out in frame
Changing, and when scan box lower end starts comprising structural plane, three parameters of calculating can just start to change, wherein contrast
It is gradually increased, energy and consistency are gradually reduced, and when completely including structural plane in scan box, contrast reaches peak value, energy
Reach the lowest point with consistency, when structural plane is gradually left in scan box upper end, contrast reduces therewith again, and energy and consistency are again
It increases with it, restores initial state；To which structural plane institute is oriented in the position for starting to occur and finally occur according to structural plane
Region.
Further, in the rock mass discontinuity Picking up geometry information method of the invention based on borehole image, Zong Xiangkuan
Degree W is set as 70PIX 100PIX two values.
Further, in the rock mass discontinuity Picking up geometry information method of the invention based on borehole image, subgraph
Size is M × N, and each parameter obtains the related value of M-W+1 retinue in contrast, energy and consistency.
Further, in the rock mass discontinuity Picking up geometry information method of the invention based on borehole image, step S4
In, the method for edge detection is to carry out edge detection using canny operator.
Further, in the rock mass discontinuity Picking up geometry information method of the invention based on borehole image, step S5
And in S6, if structural plane edge is obvious, computer software is used directly to be fitted with the edge line connected out；If structure
Face edge is relatively fuzzy, and overall structure face region is relatively broken, then can select suitable side according to professional knowledge by manual screening
Edge line carries out subsequent fitting, and the figure line fitted is made more to meet the shown structural plane edge out of image.
Further, in the rock mass discontinuity Picking up geometry information method of the invention based on borehole image, drill drawing
As being after drilling, to be analyzed and obtained using borehole imaging during reconnoitring probing.
Implement the rock mass discontinuity Picking up geometry information method of the invention based on borehole image, has below beneficial to effect
Fruit: it is computationally intensive that present invention improves the prior arts, and calculating speed is slow, is fitted the problems such as not accurate enough, proposes first fitting knot
Structure face edge, then the new approaches of structural plane parameter calculating are carried out, there is great practical value.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the technical route of one embodiment of rock mass discontinuity Picking up geometry information method the present invention is based on borehole image
Figure；
Fig. 2 is scan box schematic diagram；
Fig. 3 is Canny operator edge detection effect picture；
Fig. 4 is edge connection effect figure；
Fig. 5 is manual edge line options figure；
Fig. 6 is structural plane edge fitting result figure；
Fig. 7 is structural plane parameter calculated result figure.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
With reference to Fig. 1, the rock mass discontinuity Picking up geometry information method based on borehole image of this implementation is comprised the following steps:
S1, borehole image is obtained.
The acquisition of borehole image needs during reconnoitring probing, after drilling, is obtained and is drilled using borehole imaging analyzer
Image.The borehole imaging analyzer that the method for the present embodiment is related to is the SR-DCT that Wuhan Sinorock Technology Co., Ltd. develops
(W) type multifunctional hole-drilling imaging analysis instrument.
S2, the borehole image of acquisition is cut, is cut into the subgraph that multiple suitable scan box are scanned, goes forward side by side
Row sequence and number, with the identification and lookup of convenience file.When necessary, denoising can also be carried out to image, these belong to
Technological means commonly used in the art, is no longer described in detail here.
S3, subgraph is scanned respectively by scan box, to orient structural plane location in each subgraph
Domain.Step S3 specifically comprises the following steps:
S31, the longitudinal width W for defining scan box, and set laterally wide with subgraph for the transverse width of scan box
Degree is consistent.Longitudinal width W answer it is moderate, it is too big or it is too small will affect positioning accuracy, longitudinal width W size and structural plane exist
The width presented in subgraph is proportional, should be depending on subgraph situation.If structural plane curve amplitude difference is little,
The size of scan box, can be according to tool when part-structure surface curve amplitude is larger can include that total surface curve is advisable
The case where body structural plane, sets.And when image cannot include complete structure face in the scan box identified, then it can pass through hand
Dynamic operation carrys out the size in correcting principle face region.The structural plane of analysis is needed in rock mass can be adjusted according to different actual conditions
It is whole.For needing the atomic small structural plane of discrimination, the smaller scan box of longitudinal width W can also be set by system and be analyzed, but
Can not be too small, the too small precision that will affect determining structural plane.And broken region complex for structural plane is also required to hand
Dynamic adjustment keeps result more acurrate to extract complete area.According to hole structure surface development feature, in this implementation transverse width according to
Subgraph width automatically determines (program meeting automatic identification subgraph width, then determine scan box transverse width), and for real
Border with example set 70PIX and 100PIX two values for scan box longitudinal width, to meet actual demand, such as Fig. 2.
S32, first gray scale that image in frame is obtained when scan box top edge is overlapped with subgraph the first row pixel
Co-occurrence matrix, scan box move down line by line, and every mobile a line is obtained according to the gray level co-occurrence matrixes for obtaining image in a frame, until subgraph
As scanned；Meanwhile contrast, energy after obtaining gray level co-occurrence matrixes, after calculating separately out each gray level co-occurrence matrixes
Amount and consistency.Assuming that subgraph size is M × N, in contrast, energy and consistency each parameter obtain M-W+1 with
The related value of row, M and N are the positive integer greater than 1.
As scan box moves down line by line, if not including structural plane, three parameters retinue base of image is not originally sent out in frame
Changing, and when scan box lower end starts comprising structural plane, three parameters of calculating can just start to change, wherein contrast
It is gradually increased, energy and consistency are gradually reduced, and when completely including structural plane in scan box, contrast reaches peak value, energy
Reach the lowest point with consistency, when structural plane is gradually left in scan box upper end, contrast reduces therewith again, and energy and consistency are again
It increases with it, restores initial state；To which structural plane institute is oriented in the position for starting to occur and finally occur according to structural plane
Region.Position i.e. by the corresponding scan box of line number where determining peak value or the lowest point where structural plane is when three ginsengs
When the line number of number positioning is inconsistent, it is rounded using the average line number of three parameters as positioning line number.
S33, the variation location structure face region according to contrast, energy and consistency.After through the above steps, really
Determine parameter peak and the lowest point, location structure face position and then scan box progress that structural plane is completely included to this
Processing, scan box, that is, structural plane region at this time.Because being that first positioning is extracted, then is accurately calculated, so just reducing meter
Calculation amount.If the scan box size of script is inadequate or excessive, then the size of adjustable scan box is preferably by structural plane
It is all selected to carry out subsequent edges detection.
S4, edge detection is carried out to the structural plane region extracted, detects the edge where structural plane.Current energy
It crosses and realizes that the operator of edge detection has very much, be respectively suitable for different characteristics of image, the present embodiment is compared by largely analysis,
It was found that the detection effect of canny operator is best, canny operator is selected to carry out the edge detection of structural plane then, and for different
Situation can also the different operator of flexible choice carry out edge detection, practice effect such as Fig. 3.
S5, it is connected by the marginal point that edge linking algorithm will test out, obtains edge line.If structural plane edge is bright
It is aobvious, then use computer software directly to carry out subsequent fitting with the edge line connected out；It is whole to tie if structural plane edge is relatively fuzzy
Structure face region is relatively broken, then suitable edge line can be selected to carry out subsequent fitting, made according to professional knowledge by manual screening
The figure line fitted more meets the shown structural plane edge out of image.Cataclasitlc structure face edge such as Fig. 4, Fig. 5 institute is manually operated
Show.
S6, fitting edge line, obtain calculating parameter, to calculate the geological information of structural plane in each subgraph, wrap
It includes:
Obtained edge line is fitted using following formula, so that it is determined that three parameter i out0, A and θ:
Wherein, i is pixel line number, and j is pixel columns, and N is every a line pixel sum, i0For sine curve center
Line line number, A, θ are the function of structural plane tendency α, angle of inclination beta respectively, as follows with structural plane transformational relation:
Wherein, the resolution ratio of K borehole image depth direction is in the present invention 3mm.D is borehole image pore size, In
It is 91mm in the present invention.
Practical fitting effect is as shown in fig. 6, output result is as shown in Figure 7.
After each subgraph is processed, that is, the geological information of structural plane in each subgraph is obtained, it when necessary, can
The geological information of multiple subgraphs is carried out split, a total data are formed.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (8)
1. a kind of rock mass discontinuity Picking up geometry information method based on borehole image, which is characterized in that comprise the following steps:
S1, borehole image is obtained；
S2, the borehole image of acquisition is cut, is cut into the subgraph that multiple suitable scan box are scanned；
S3, subgraph is scanned respectively by scan box, to orient structural plane region in each subgraph；
S4, edge detection is carried out to the structural plane region extracted, detects the edge where structural plane；
S5, it is connected by the marginal point that edge linking algorithm will test out, obtains edge line；
S6, fitting edge line, obtain calculating parameter, to calculate the geological information of structural plane in each subgraph, comprising:
Obtained edge line is fitted using following formula, so that it is determined that three parameter i out0, A and θ:
Wherein, i is pixel line number, and j is pixel columns, and N is every a line pixel sum, i0For sine curve center line row
Number；
Then A and θ are brought into following formula, obtains structural plane tendency α, angle of inclination beta, to obtain the geological information of structural plane:
Wherein, the resolution ratio of K borehole image depth direction, D are borehole image pore sizes.
2. the rock mass discontinuity Picking up geometry information method according to claim 1 based on borehole image, which is characterized in that
Step S3 specifically comprises the following steps:
S31, the longitudinal width W for defining scan box, and the transverse width one with subgraph is set by the transverse width of scan box
It causes；
S32, first gray scale symbiosis that image in frame is obtained when scan box top edge is overlapped with subgraph the first row pixel
Matrix, scan box move down line by line, and every mobile a line is obtained according to the gray level co-occurrence matrixes for obtaining image in a frame, until subgraph is swept
It retouches and finishes；Meanwhile after obtaining gray level co-occurrence matrixes, contrast, energy after calculating separately out each gray level co-occurrence matrixes and
Consistency；
S33, the variation location structure face region according to contrast, energy and consistency.
3. the rock mass discontinuity Picking up geometry information method according to claim 2 based on borehole image, which is characterized in that
The positioning principle of step S33 are as follows:
As scan box moves down line by line, if not including structural plane, three parameters retinue base of image does not originally become in frame
Change, and when scan box lower end starts comprising structural plane, three parameters of calculating can just start to change, wherein contrast is gradually
Increase, energy and consistency are gradually reduced, and when completely including structural plane in scan box, contrast reaches peak value, energy and one
Cause property reaches the lowest point, and when structural plane is gradually left in scan box upper end, contrast reduces therewith again, energy and consistency and therewith
Increase, restores initial state；To start to occur according to structural plane and finally where structural plane is oriented in the position that occurs
Region.
4. the rock mass discontinuity Picking up geometry information method according to claim 2 based on borehole image, which is characterized in that
Longitudinal width W is set as 70PIX 100PIX two values.
5. the rock mass discontinuity Picking up geometry information method according to claim 2 based on borehole image, which is characterized in that
Subgraph size is M × N, and each parameter obtains the related value of M-W+1 retinue in contrast, energy and consistency.
6. the rock mass discontinuity Picking up geometry information method according to claim 1 based on borehole image, which is characterized in that
In step S4, the method for edge detection is to carry out edge detection using canny operator.
7. the rock mass discontinuity Picking up geometry information method according to claim 1 based on borehole image, which is characterized in that
In step S5 and S6, if structural plane edge is obvious, computer software is used directly to be fitted with the edge line connected out；
If structural plane edge is relatively fuzzy, overall structure face region is relatively broken, then can be by manual screening, and according to professional knowledge, selection is closed
Suitable edge line carries out subsequent fitting, and the figure line fitted is made more to meet the shown structural plane edge out of image.
8. the rock mass discontinuity Picking up geometry information method according to claim 1 based on borehole image, which is characterized in that
Borehole image is after drilling, to be analyzed and obtained using borehole imaging during reconnoitring probing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910552020.2A CN110443844B (en) | 2019-06-25 | 2019-06-25 | Rock mass structural plane geometric information extraction method based on drilling image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910552020.2A CN110443844B (en) | 2019-06-25 | 2019-06-25 | Rock mass structural plane geometric information extraction method based on drilling image |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110443844A true CN110443844A (en) | 2019-11-12 |
| CN110443844B CN110443844B (en) | 2021-10-15 |
Family
ID=68428254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910552020.2A Active CN110443844B (en) | 2019-06-25 | 2019-06-25 | Rock mass structural plane geometric information extraction method based on drilling image |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110443844B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104112126A (en) * | 2014-08-06 | 2014-10-22 | 南京大学镇江高新技术研究院 | Marble microsection automatically identifying method |
| GB2527444A (en) * | 2013-03-29 | 2015-12-23 | Schlumberger Holdings | Image symmetry for dip determination |
| CN105393110A (en) * | 2013-08-06 | 2016-03-09 | Bp北美公司 | Image-based direct numerical simulation of petrophysical properties under simulated stress and strain conditions |
| CN105825550A (en) * | 2016-03-15 | 2016-08-03 | 中国科学院沈阳应用生态研究所 | Consistency considered section modeling method of complex 3D building model |
| CN106227923A (en) * | 2016-07-14 | 2016-12-14 | 中国地质大学（武汉） | A kind of rock mass discontinuity three-dimensional roughness evaluation methodology |
| WO2017039475A1 (en) * | 2015-09-03 | 2017-03-09 | Schlumberger Technology Corporation | A computer-implemented method and a system for creating a three-dimensional mineral model of a sample of a heterogenerous medium |
| CN107945272A (en) * | 2017-11-09 | 2018-04-20 | 长江三峡勘测研究院有限公司（武汉） | A kind of searching method of the rock mass discontinuity based on high definition drilling colour TV |
| CN107992901A (en) * | 2017-12-18 | 2018-05-04 | 武汉大学 | A kind of borehole radar image rock stratum sorting technique based on textural characteristics |
| CN108109157A (en) * | 2017-12-18 | 2018-06-01 | 武汉大学 | A kind of rock mass analysis and assessment method based on digital panorama borehole image |
-
2019
- 2019-06-25 CN CN201910552020.2A patent/CN110443844B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2527444A (en) * | 2013-03-29 | 2015-12-23 | Schlumberger Holdings | Image symmetry for dip determination |
| CN105393110A (en) * | 2013-08-06 | 2016-03-09 | Bp北美公司 | Image-based direct numerical simulation of petrophysical properties under simulated stress and strain conditions |
| CN104112126A (en) * | 2014-08-06 | 2014-10-22 | 南京大学镇江高新技术研究院 | Marble microsection automatically identifying method |
| WO2017039475A1 (en) * | 2015-09-03 | 2017-03-09 | Schlumberger Technology Corporation | A computer-implemented method and a system for creating a three-dimensional mineral model of a sample of a heterogenerous medium |
| CN105825550A (en) * | 2016-03-15 | 2016-08-03 | 中国科学院沈阳应用生态研究所 | Consistency considered section modeling method of complex 3D building model |
| CN106227923A (en) * | 2016-07-14 | 2016-12-14 | 中国地质大学（武汉） | A kind of rock mass discontinuity three-dimensional roughness evaluation methodology |
| CN107945272A (en) * | 2017-11-09 | 2018-04-20 | 长江三峡勘测研究院有限公司（武汉） | A kind of searching method of the rock mass discontinuity based on high definition drilling colour TV |
| CN107992901A (en) * | 2017-12-18 | 2018-05-04 | 武汉大学 | A kind of borehole radar image rock stratum sorting technique based on textural characteristics |
| CN108109157A (en) * | 2017-12-18 | 2018-06-01 | 武汉大学 | A kind of rock mass analysis and assessment method based on digital panorama borehole image |
Non-Patent Citations (3)
| Title |
|---|
| YUNFENG GE等: "Deformation Monitoring of Earth Fissure Hazards Using Terrestrial Laser Scanning", 《SENSOR》 * |
| 王川婴 等: "基于特征函数的钻孔图像结构面识别方法", 《岩土力学》 * |
| 田欣利: "基于灰度共生矩阵和神经网络的Si3N4陶瓷推挤加工表面纹理分析", 《兵工学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110443844B (en) | 2021-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Graham et al. | Automated sizing of coarse-grained sediments: image-processing procedures | |
| CN105513038B (en) | Image matching method and mobile phone application test platform | |
| CN106896213B (en) | A kind of rock mass discontinuity intelligent recognition and information extracting method based on point cloud data | |
| CN104502990A (en) | Geological survey method of tunnel face based on digital image | |
| CN106251341B (en) | Printing quality detection method | |
| CN108364280A (en) | Structural cracks automation describes and width accurately measures method and apparatus | |
| CN108764257A (en) | A kind of pointer instrument recognition methods of various visual angles | |
| CN102704215B (en) | Automatic cutting method of embroidery cloth based on combination of DST file parsing and machine vision | |
| CN106989683B (en) | A kind of shield tail clearance of shield machine vision measuring method | |
| Hu et al. | A robust method for semi-automatic extraction of road centerlines using a piecewise parabolic model and least square template matching | |
| CN108921865A (en) | A kind of jamproof sub-pix line fitting method | |
| CN109523516A (en) | A kind of object level land cover pattern change detecting method based on double constraints condition | |
| CN104697476A (en) | Automatic detection method and device for roughness light-incision profile curve | |
| CN108470338B (en) | A kind of water level monitoring method | |
| CN108109157B (en) | Rock mass evaluation analysis method based on digital panoramic borehole image | |
| CN111738229B (en) | Automatic reading method for scale of pointer dial | |
| CN110208859A (en) | Oil-base mud well crack quantitative parameter intelligence computation method based on ultrasonic imaging | |
| CN108966500A (en) | The pcb board of view-based access control model tracking is secondary and multiple accurate drilling method | |
| CN106971406A (en) | The detection method and device of object pose | |
| CN107392929A (en) | A kind of intelligent target detection and dimension measurement method based on human vision model | |
| CN103149087B (en) | Follow-up window and digital image-based non-contact real-time strain measurement method | |
| CN110570401B (en) | Slope fractured rock mass information acquisition method based on image recognition | |
| CN109781076A (en) | Pretreatment to data before Tunnel testing and on the spot dynamic detection system | |
| CN109360144A (en) | A kind of image real time correction improved method based on cell phone platform | |
| CN108550154A (en) | A kind of method of accurately measuring karst earth's surface bare rock accounting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |