CN115656053A - Rock mineral content testing method and system - Google Patents
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Abstract
The invention belongs to the technical field of rock mineral content testing in engineering geology and provides a rock mineral content testing method and a rock mineral content testing system. The method comprises the steps of obtaining spectral information and image information of annular tunnel surrounding rocks of a preset mileage section, and splicing the spectral information and the image information into a 3D tunnel image spectrogram; extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectral characteristic vectors from the 3D tunnel image spectrogram; performing end-member unmixing on spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves; fusing image characteristic vectors of rock and ore and spectral characteristic vectors of end member spectrums, identifying rock and ore categories based on a tunnel site region spectrum library, and calibrating mineral categories obtained by end member unmixing as a priori result; weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals, and displaying the distribution and content change of the minerals in each pixel of the 3D tunnel image.
Description
Technical Field
The invention belongs to the technical field of rock mineral content testing in engineering geology, and particularly relates to a rock mineral content testing method and system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In geological survey and mineral deposit exploration processes, how to quickly, conveniently and accurately detect various mineral components and contents thereof in rocks is of great importance. Accurate and comprehensive qualitative and quantitative mineral information is provided for the research of geological work such as regional geological survey and the like, the research can be further carried out on the cause, sedimentary/diagenetic environment and evolution of minerals, the analysis of mineral source and mineralization and alteration information in mineral resource evaluation is facilitated, and a solid foundation is laid for the smooth completion of geological work. Although the laboratory chemical detection method for the content of various minerals in the rock is accurate, the whole process is complex and tedious, rock samples generally need to be destroyed for slicing and grinding, and detection personnel need to have higher professional knowledge and detection skills, and instruments needed for testing are difficult to apply on a tunnel site, so that rapid in-situ testing cannot be realized.
The inventor finds that the mineral content is simply calculated by the conventional image pixel statistical classification method, the content accuracy calculated by the method needs to be improved, the phenomenon of 'same-object different spectrum' or 'same-spectrum foreign matter' often occurs when the rock and ore classification is carried out only by spectral information, and the in-situ analysis of minerals cannot be realized.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a rock mineral content testing method and a rock mineral content testing system, which can identify the lithology and spatial distribution condition on a tunnel face in real time, judge the geological condition of a rock body in front of a tunnel and provide an important reference basis for mastering the geological condition of the rock body in front of the tunnel.
In order to achieve the purpose, the invention adopts the following technical scheme:
a first aspect of the invention provides a rock mineral content testing method comprising:
acquiring spectral information and image information of annular tunnel surrounding rocks of a preset mileage section, and splicing the spectral information and the image information into a 3D tunnel image spectrogram;
extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectral characteristic vectors from the 3D tunnel image spectrogram;
performing end-member unmixing on spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves;
fusing image characteristic vectors of the rock and the spectral characteristic vectors of the end member spectrum, identifying rock and ore categories based on a tunnel site region spectrum library, using the rock and ore categories as prior results, and calibrating mineral categories obtained by end member unmixing;
weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals, and displaying the distribution and content change of the minerals in each pixel of the 3D tunnel image.
As an implementation mode, the relationship between the map fusion information of the tunnel and the rock and the mine is stored in the tunnel address area map library, and the relationship is constructed based on the pre-sampled tunnel spectrum information and the image information.
The technical scheme has the advantages that the tunnel site area map library is established by adopting regional geological analysis, and the accuracy of mineral identification is improved in a map fusion mode.
As an embodiment, the change of the distribution and content of minerals is shown in each pixel of the 3D tunnel image by means of color development and mapping.
The produced advantage of above-mentioned technical scheme lies in, and the result shows the pluralism, can carry out the visual colour development show of digitization to mineral composition, content, satisfies different demands, makes geology worker know the geological conditions in tunnel more comprehensively.
As an implementation manner, the end-member unmixing of the spectral information in the 3D tunnel image spectrogram includes determining the number of end members, the spectral feature of each end member, and the end-member content of each pixel point in the spectral information.
As an implementation mode, the content change conditions of different pixel points of the same mineral, the spatial distribution conditions of different minerals and the content digitization conditions of different minerals are visually displayed in a 3D tunnel image.
As an implementation mode, the content change condition of different pixel points of the same mineral is that color development processing is performed according to the weight occupied by different pixel minerals and the weight;
as an embodiment, the spatial distribution of the minerals is subjected to mineral map filling according to the maximum content of each pixel point.
As an embodiment, the digitization of the different minerals is weighted according to regional content:
a second aspect of the invention provides a rock mineral content testing system.
In one or more embodiments, a rock mineral content testing system, comprising:
the information splicing module is used for acquiring spectral information and image information of annular tunnel surrounding rocks of a preset mileage section and splicing the spectral information and the image information into a 3D tunnel image spectrogram;
the characteristic extraction module is used for extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectral characteristic vectors from the 3D tunnel image spectrogram;
the end member unmixing module is used for performing end member unmixing on the spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves;
the category calibration module is used for fusing image characteristic vectors of rock and ore and spectral characteristic vectors of end member spectrums, identifying rock and ore categories based on a tunnel site region spectrum library, and calibrating mineral categories obtained by end member unmixing as a priori result;
and the information display module is used for weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals, and displaying the distribution and content change of the minerals in each pixel of the 3D tunnel image.
As an implementation mode, the relationship between the map fusion information of the tunnel and the rock and the mine is stored in the tunnel address area map library, and the relationship is constructed based on the pre-sampled tunnel spectrum information and the image information.
In the information display module, the change of the distribution and the content of the minerals is displayed in each pixel of the 3D tunnel image in a color development and filling mode.
As an implementation manner, in the end-member unmixing module, the end-member unmixing the spectral information in the 3D tunnel image spectrogram includes determining the number of end members existing in the spectral information, the spectral feature of each end member, and the end-member content of each pixel point.
As an implementation manner, in the information display module, content change conditions of different pixel points of the same mineral, spatial distribution conditions of different minerals, and content digitization conditions of different minerals are visually displayed in a 3D tunnel image.
As an implementation mode, the content change condition of different pixel points of the same mineral is that color development processing is performed according to the weight occupied by different pixel minerals and the weight;
or as an embodiment, the spatial distribution of the minerals is subjected to mineral map filling according to the maximum content of each pixel point;
as an embodiment, the digitization of the different minerals is weighted according to regional content:
in one or more embodiments, a rock mineral content testing system, comprising: the system comprises an image spectrum shooting system, a data processing system and a result display system;
the image spectrum shooting system comprises a tunnel region map information pre-acquisition module and a tunnel surrounding rock scanning shooting module; the tunnel area map information pre-acquisition module is used for pre-acquiring tunnel area map information, and the tunnel surrounding rock scanning and shooting module is used for scanning the spectral information and the image information of the annular tunnel surrounding rock of a preset mileage section;
the data processing system comprises an image 3D restoration module and an image spectrum information processing module; the image 3D restoration module is used for splicing the spectral information and the image information of the annular tunnel surrounding rock of the preset mileage section into a 3D tunnel image spectrogram;
the image spectrum information processing module is used for:
extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectral characteristic vectors from the 3D tunnel image spectrogram;
performing end-member unmixing on spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves;
fusing image characteristic vectors of the rock and the spectral characteristic vectors of the end member spectrum, identifying rock and ore categories based on a tunnel site region spectrum library, using the rock and ore categories as prior results, and calibrating mineral categories obtained by end member unmixing;
weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals;
the result display system is used for displaying the change of the distribution and the content of the minerals in each pixel element of the 3D tunnel image.
A third aspect of the invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the rock mineral content testing method as described above.
A fourth aspect of the invention provides a computer apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor when executing the program implementing the steps in the rock mineral content testing method as described above.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, the accuracy of mineral identification is improved by adopting a map fusion mode, and meanwhile, the result display is diversified, so that the components and the content of minerals can be digitally and visually displayed in a color manner, different requirements are met, and geologists can more comprehensively know the geological condition of the tunnel.
(2) The balance of the mineral content is different from the traditional image pixel statistical classification method, namely the proportion of the pixel area is simply adopted as the content of a research area, the proportion of each pixel mineral and the proportion of the pixels are comprehensively considered for weighting processing, and the mineral content and the distribution condition are finally obtained.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a flow chart of a rock mineral content testing method of an embodiment of the invention;
FIG. 2 is a schematic diagram of a rock mineral content testing system according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a scanning tunnel of the image spectrum capture system according to an embodiment of the present invention.
Wherein, 1, standard white board; 2. an imaging spectral camera; 3. a camera housing; 4. a rotatable telescopic table; 5. a light source; 6. a telescopic rod; 7. slit strip imaging; 8. a tunnel robot.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example one
Referring to fig. 1, the present embodiment provides a rock mineral content testing method, which specifically includes the following steps:
step 1: and acquiring spectral information and image information of the annular tunnel surrounding rock of the preset mileage section, and splicing into a 3D tunnel image spectrogram.
The spectral information and the image information of the surrounding rock of the annular tunnel with the preset mileage section can be acquired by adopting an imaging spectral camera carried on a tunnel robot. The tunnel robot moves forwards after completing pushing and sweeping a circle of tunnel surrounding rock frame by frame along with slit type and swing-sweeping imaging of the imaging spectrum camera, continues pushing and sweeping imaging of the next mileage section, and finally scans to a tunnel face to form a 3D all-directional scanning image.
Specifically, the moving speed of the tunnel robot is calculated by parameters such as set exposure time, the length of a lens, the distance between the surface of an object and a slit of an imaging spectrum camera and the like, and the instantaneous field of view is imaged in the exposure time through a slit field of view of the spectrum camera; the exposure time is determined by the surrounding environment, the brightness of the halogen lamp, the signal-to-noise ratio, and the like.
The annular image spectrum data of different mileage are spliced into a 3D tunnel shape, and the splicing can be simply completed by the analysis software of the image spectrometer.
Step 2: and extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectral characteristic vectors from the 3D tunnel image spectrogram.
Before step 2, preprocessing the 3D tunnel image spectrogram is further included, and there are many preprocessing methods, such as a convolution smoothing method, a competitive adaptive re-weighting algorithm, a standard normal variable change, a continuous projection algorithm, and the like.
Therefore, noise, stray light and other irrelevant information can be reduced, full-waveband spectrum data has multiple collinearity and information redundancy, the noise can be eliminated by preprocessing the original spectrum and selecting the wavelength, irrelevant or nonlinear variables can be eliminated, the data volume is reduced, the model is simplified, the operation speed is increased, and the performance of the model is improved.
Irrelevant wavelengths can be removed through the step 2 to improve the running speed, a continuous projection algorithm, a competitive adaptive re-weighting algorithm and the like can be adopted, the absorption feature depth is closely related to the content of the substance components, and the absorption feature depth is widely used for quantitative interpretation of surface minerals or certain components based on the correlation between the absorption feature depth and the content of the minerals.
And step 3: and performing end-member unmixing on the spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves.
As an implementation manner, the end-member unmixing of the spectral information in the 3D tunnel image spectrogram includes determining the number of end members, the spectral feature of each end member, and the end-member content of each pixel point in the spectral information.
Thus obtaining the mineral combination, the mineral end members and the content of each pixel in the image;
the rock reflection spectrum is the comprehensive reflection of the reflection spectrum of the constituent minerals, and the process of identifying the independent component types and the abundance content thereof from the mixed spectrum is spectrum unmixing. The purpose of spectral unmixing is to solve the corresponding proportion of various different substances, i.e. end members, in the mixed pixel element, which is called abundance. The mineral spectrum unmixing module mainly comprises three steps: determining the number of end members in the data set; secondly, determining the spectral characteristics of each end member; thirdly, calculating the content of the end member of each pixel point; each of these steps represents a unique problem for which a number of algorithms have been developed, each image element in the final image indicating the mineral composition, mineral end members and their content.
Wherein S (lambda) is the mixed spectrum, n is the number of mixed end members, A i For each end member content, S (lambda) i The residual between the actual mixed spectra calculated for the spectra of the class i end-members, δ (λ);
absorption center wavelengths have been shown to distinguish between a number of similar mineral species, so it is necessary to know the center wavelength of certain diagnostic features before performing spectral analysis of the surface composition. The depth of the absorption characteristic is closely related to the content of the substance component, and is widely used for quantitative interpretation of surface minerals or certain components based on the correlation between the depth of the absorption characteristic and the content of the minerals. In addition, some surface factors in the environment also affect the absorption characteristics of the hyperspectral data, such as the water content of rocks, and the degree of influence of the environmental factors can be estimated or data with the influence eliminated can be obtained by establishing the statistical relationship between the absorption characteristic parameters and the environmental factors.
And 4, step 4: the image characteristic vector of the rock and the spectral characteristic vector of the end member spectrum are fused, the rock and ore categories are identified based on the tunnel site region map library, the rock and ore categories are used as prior results, the mineral categories obtained by end member unmixing are calibrated, the region end member map library can effectively reduce mineral combinations which do not accord with actual rules in the identification process, and the reliability of the results is guaranteed.
As an implementation mode, the relationship between the map fusion information of the tunnel and the rock and the mine is stored in the tunnel address area map library, and the relationship is constructed based on the pre-sampled tunnel spectrum information and the image information.
Because the mineral components of the rock are closely related to the regional geological background, the geological background of the tunnel site area is investigated by combining the existing geological data and survey reports, the rock and ore composition of the rock in the tunnel is known, and support is provided for subsequent qualitative and quantitative analysis of the rock and ore.
The technical scheme has the advantages that the tunnel site area map library is established by adopting regional geological analysis, and the accuracy of mineral identification is improved in a map fusion mode.
And 5: weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals, and displaying the distribution and content change of the minerals in each pixel of the 3D tunnel image.
As an embodiment, the change of the distribution and content of minerals is shown in each pixel of the 3D tunnel image by means of color development and mapping. The result shows the pluralism like this, can carry out the visual colour development show of digitization to mineral composition, content, satisfies different demands, makes geology worker know the geological conditions in tunnel more comprehensively.
The content change condition of different pixel points of the same mineral, the spatial distribution condition of different minerals and the content digitization condition of different minerals are visually displayed in the 3D tunnel image.
The content change condition of different pixel points of the same mineral is that the color development processing is carried out according to the weight of different pixel minerals and the weight;
And performing mineral map filling processing on the spatial distribution condition of the minerals according to the comprehensive identification result of the minerals.
And selecting the minerals with the maximum weight of each unit calculated by the unmixing model and the comprehensive result of map fusion identification according to the spatial distribution condition of the minerals, and performing map filling operation.
The digitalization conditions of the different minerals are weighted according to the regional content:
example two
The embodiment provides a rock mineral content test system, it includes:
(1) The information splicing module is used for acquiring spectral information and image information of the annular tunnel surrounding rock of a preset mileage section and splicing the spectral information and the image information into a 3D tunnel image spectrogram;
(2) The characteristic extraction module is used for extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectral characteristic vectors from the 3D tunnel image spectrogram;
(3) The end member unmixing module is used for performing end member unmixing on spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves;
specifically, in the end member unmixing module, the end member unmixing of the spectral information in the 3D tunnel image spectrogram includes determining the number of end members, the spectral characteristics of each end member, and the end member content of each pixel point in the spectral information.
(4) The category calibration module is used for fusing image characteristic vectors and spectrum characteristic vectors of the rock and the mine, identifying the category of the rock and the mine based on a tunnel address region spectrum library, and calibrating the mineral category obtained by end element unmixing as a prior result;
specifically, the relationship between the map fusion information of the tunnel and the rock and the mine is stored in the tunnel address area map library, and the relationship is constructed based on the pre-sampled tunnel spectrum information and the image information.
(5) And the information display module is used for weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals, and displaying the distribution and content change of the minerals in each pixel of the 3D tunnel image.
Specifically, in the information display module, the distribution and content change of minerals is displayed in each pixel element of the 3D tunnel image in a color development and filling mode.
Specifically, in the information display module, content change conditions of different pixel points of the same mineral, spatial distribution conditions of different minerals, and content digitization conditions of different minerals are visually displayed in a 3D tunnel image.
Wherein, the content change condition of different pixel points of the same mineral is to perform color development treatment according to the weight of different pixel minerals and the weight;
the spatial distribution condition of the minerals is subjected to mineral map filling treatment according to the maximum content of each pixel point;
the digitalization conditions of the different minerals are weighted according to the regional content:
it should be noted that, each module in the present embodiment corresponds to each step in the first embodiment one to one, and the specific implementation process is the same, which is not described herein again.
EXAMPLE III
As shown in fig. 2, the rock mineral content testing system of the embodiment includes: the system comprises an image spectrum shooting system, a data processing system and a result display system.
In a specific implementation process, the image spectrum shooting system comprises a tunnel region map information pre-acquisition module and a tunnel surrounding rock scanning shooting module; the tunnel area map information pre-acquisition module is used for pre-acquiring tunnel area map information, and the tunnel surrounding rock scanning and shooting module is used for scanning spectral information and image information of the annular tunnel surrounding rock of a preset mileage section.
As shown in fig. 3, the image spectrum shooting system includes a tunnel robot 8, an imaging spectrum camera 2, a standard white board 1, a light source 5, a rotatable telescopic table 4 and a battery, wherein, after the tunnel robot 8 is pushed and swept one frame by one frame along with the slit bar imaging 7 and the sweep imaging of the imaging spectrum camera 2, a central control system sends an instruction to move forward, the push and sweep imaging of the next mileage section is continued, and finally the image is scanned to the face to form a 3D omnibearing scanning image. The imaging spectrum camera 2 is also provided with a camera housing 3. The bottom of the rotatable telescopic table 4 is provided with a telescopic rod 6.
The imaging spectrum camera 2 is used as a core component and mainly comprises a photosensitive element CCD detector, a light splitting device, a lens and a slit;
the standard white board 1 can weaken the influence of the inherent dark current noise of the CCD detector and the collected ambient light, and realizes the conversion of the reflectivity through the black and white correction of the image.
It should be noted here that, the light source 5 is generally selected from a halogen lamp, which has a long life and a large power, and has a full-band spectral range, so as to meet the requirements of the image spectral system on the wavelength range of the light source, and at the same time, the light source control system needs to ensure the stability and the height adjustability of the light source.
The moving speed of the tunnel robot is calculated by parameters such as set exposure time, the length of a lens, the distance between the surface of an object and a slit of an imaging spectrum camera and the like, and the instantaneous field of view is imaged in the exposure time through a slit field of view of the spectrum camera; the exposure time is determined by the surrounding environment, the brightness of the halogen lamp, the signal-to-noise ratio, and the like.
The image and the spectral information of rock ore deposit are gathered in laboratory research such as conveyer belt can be collocated to this embodiment, constantly perfect the map storehouse of research area, can also carry on unmanned aerial vehicle to not confine to on the tunnel robot.
The embodiment uses the tunnel robot to travel to predetermined position, realizes normal position test, unmanned intelligent operation, and the form of sweeping is pushed away through a frame to the simultaneous scanning formation of image, considers the shape of tunnel country rock, pushes away and sweeps cyclic annular image, distinguishes in the three-dimensional modeling of later stage image concatenation, and the recovery of this tunnel omnidirectional forms images the accuracy is higher.
In a specific implementation process, the data processing system comprises an image 3D restoration module and an image spectral information processing module; the image 3D restoration module is used for splicing the spectral information and the image information of the annular tunnel surrounding rock of the preset mileage section into a 3D tunnel image spectrogram.
In a specific implementation process, the image spectrum information processing module is configured to:
extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectral characteristic vectors from the 3D tunnel image spectrogram;
performing end-member unmixing on spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves;
fusing image characteristic vectors of rock and ore and spectral characteristic vectors of end member spectrums, identifying rock and ore categories based on a tunnel site region spectrum library, and calibrating mineral categories obtained by end member unmixing as a priori result;
weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals;
the result display system is used for displaying the change of the distribution and the content of the minerals in each pixel element of the 3D tunnel image.
Example four
The present embodiment provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the rock mineral content testing method as described above.
EXAMPLE five
The present embodiment provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the rock mineral content testing method as described above when executing the program.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A rock mineral content testing method, comprising:
acquiring spectral information and image information of annular tunnel surrounding rocks of a preset mileage section, and splicing the spectral information and the image information into a 3D tunnel image spectrogram;
extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectral characteristic vectors from the 3D tunnel image spectrogram;
performing end-member unmixing on spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves;
fusing image characteristic vectors of rock and ore and spectral characteristic vectors of end member spectrums, identifying rock and ore categories based on a tunnel site region spectrum library, and calibrating mineral categories obtained by end member unmixing as a priori result;
weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals, and displaying the distribution and content change of the minerals in each pixel of the 3D tunnel image.
2. The rock mineral content testing method of claim 1, wherein a relation between map fusion information of a tunnel and a rock and a mine is stored in the tunnel region map library, and the relation is constructed based on pre-sampled tunnel spectrum information and image information.
3. The rock mineral content testing method of claim 1, wherein changes in distribution and content of minerals are exhibited in each pixel element of the 3D tunnel image in a chromogenic and filling mode.
4. The rock mineral content testing method of claim 1, wherein the results of end-member unmixing the spectral information in the 3D tunnel image spectrogram comprise determining the number of end-members present in the spectral information, the spectral characteristics of each end-member, and the end-member content of each pixel point.
5. The rock mineral content testing method of claim 1, wherein content change conditions of different pixel points of the same mineral, spatial distribution conditions of different minerals and content digitization conditions of different minerals are visually displayed in the 3D tunnel image.
6. The rock mineral content testing method of claim 5, wherein the content change condition of different pixel points of the same mineral is that color development processing is performed according to the weight of different pixel minerals and the weight;
or
The spatial distribution condition of the minerals is subjected to mineral map filling treatment according to the maximum content of each pixel point;
or
The digitalization conditions of the different minerals are weighted according to the regional content:
7. a rock mineral content testing system, comprising:
the information splicing module is used for acquiring spectral information and image information of the annular tunnel surrounding rock of a preset mileage section and splicing the spectral information and the image information into a 3D tunnel image spectrogram;
the characteristic extraction module is used for extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectrum characteristic vectors from the 3D tunnel image spectrogram;
the end member unmixing module is used for performing end member unmixing on the spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves;
the category calibration module is used for fusing image characteristic vectors of rock and ore and spectral characteristic vectors of end member spectrums, identifying rock and ore categories based on a tunnel site region spectrum library, and calibrating mineral categories obtained by end member unmixing as a priori result;
and the information display module is used for weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals, and displaying the distribution and content change of the minerals in each pixel of the 3D tunnel image.
8. The rock mineral content testing system of claim 7, wherein the tunnel site region map library stores a relationship between map fusion information of tunnels and rock minerals, the relationship being constructed based on pre-sampled tunnel spectral information and image information;
or displaying the change of the distribution and the content of the minerals in each pixel element of the 3D tunnel image in a color development and map filling mode;
or in the end member unmixing module, performing end member unmixing on the spectral information in the 3D tunnel image spectrogram, wherein the end member unmixing result comprises the steps of determining the number of end members, the spectral characteristics of each end member and the end member content of each pixel point in the spectral information;
or in the information display module, the content change conditions of different pixel points of the same mineral, the spatial distribution conditions of different minerals and the content digitization conditions of different minerals are visually displayed in the 3D tunnel image.
9. A rock mineral content testing system, comprising: the system comprises an image spectrum shooting system, a data processing system and a result display system;
the image spectrum shooting system comprises a tunnel region map information pre-acquisition module and a tunnel surrounding rock scanning shooting module; the tunnel area map information pre-acquisition module is used for pre-acquiring tunnel area map information, and the tunnel surrounding rock scanning and shooting module is used for scanning the spectral information and the image information of the annular tunnel surrounding rock of a preset mileage section;
the data processing system comprises an image 3D restoration module and an image spectrum information processing module; the image 3D restoration module is used for splicing the spectral information and the image information of the annular tunnel surrounding rock of the preset mileage section into a 3D tunnel image spectrogram;
the image spectrum information processing module is used for:
extracting characteristic sensitive wave bands, image characteristic vectors of rock and ore and spectral characteristic vectors from the 3D tunnel image spectrogram;
performing end-member unmixing on spectral information in the 3D tunnel image spectrogram based on the characteristic sensitive waves;
fusing image characteristic vectors of rock and ore and spectral characteristic vectors of end member spectrums, identifying rock and ore categories based on a tunnel site region spectrum library, and calibrating mineral categories obtained by end member unmixing as a priori result;
weighting the weight of each mineral unmixed by each pixel end member and the pixel points occupied by the minerals to obtain the content of the minerals;
the result display system is used for displaying the change of the distribution and the content of the minerals in each pixel element of the 3D tunnel image.
10. A computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program carries out the steps of the method of rock mineral content testing according to any one of claims 1-6.
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