CN108051375A - The method that high light spectrum image-forming technology monitors marine sediment section content of material in real time - Google Patents
The method that high light spectrum image-forming technology monitors marine sediment section content of material in real time Download PDFInfo
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Abstract
The invention belongs to measure content of material technical field by spectral quality, a kind of method that high light spectrum image-forming technology monitors marine sediment section content of material in real time is disclosed, step is：1) sample cross-section high spectrum image is obtained, reads high-spectral data into computer；2) space is carried out to image and cuts out and extract effective color according to the demand of monitoring deposit different material content in a computer；3) Pretreated spectra and extraction characteristic wavelength carry out high-spectral data according to the demand of monitoring deposit different material content in a computer；4) according to the demand of monitoring deposit different material content, the spectrum substitution of each pixel of high spectrum image is had been established in model, obtains the prediction result of each content of material of the sediment sample in real time.The present invention is based on high light spectrum image-forming technology, one-shot measurement is realized, while obtain content of the different depth deposit containing different material, it is simple, convenient, quickly each content of material of different depth deposit is measured in real time.
Description
Technical field
The present invention relates to measure content of material technical field by spectral quality, and in particular to high light spectrum image-forming technology is real-time
The method for monitoring marine sediment section content of material.
Background technology
Marine sediment is that have the mineral of heterogeneity and source or the detrital material of biology by marine bottom accumulation,
Marine sediment also has the coating of maximum area on the earth simultaneously, therefore marine sediment is constituted in terrestrial space covering
The maximum single ecosystem, there is critical role in Global Biogeochemical Cycle.Marine sediment is by the mankind at present
The influence of activity is increasing, and marine sediment is once polluted, it will causes the deterioration of the ecological environment, threatens benthon
Existence, so as to cause serious marine eco-environment problem.Therefore the content of each substance of marine sediment is monitored in real time to understanding
The basic condition in the marine site, the generation for preventing ecological problem, the pollution improved the ecological environment in time, reduce marine sediment play
Important role.
At present, chemical method is mainly used for the measurement of each content of material of deposit, different substances will use difference
Chemical measurement method, and this method needs complicated pre-treatment, and it is longer to obtain the data cycle, takes time and effort, it is impossible to prison in real time
Survey the variation of each content of material of deposit.Therefore it provides it is a kind of it is simple, quick and easily measuring method is necessary.
The content of the invention
The present invention is in order to solve the above technical problems, propose that one kind is simple, quick and easily high light spectrum image-forming technology is real-time
The method for monitoring marine sediment section content of material, is achieved using following technical scheme.
The method that high light spectrum image-forming technology monitors marine sediment section content of material in real time, step are as follows：
(1) its section high spectrum image is obtained to the sediment sample just gathered, high-spectral data is read, data is passed to calculating
In machine.The sediment sample of acquisition is hemipelagic sediment or neritic sediment or halmeic deposit, according to sediment depth need
Shoot high spectrum image.
(2) in a computer, according to the demand of monitoring deposit different material content, space is carried out to high spectrum image and is cut
It cuts out, chooses the high spectrum image of the useful space, that is, the extraneous background of high spectrum image is removed, including removing effective high spectrum image
Extraneous background and solve the problems, such as anamorphose.Space sanction is carried out to image using mahalanobis distance method, minimum distance method scheduling algorithm
It cuts.
(3) in a computer, according to the demand of monitoring deposit different material content, have to high spectrum image RGB extractions
It imitates information and carries out image segmentation, the later stage is predicted in favor of eliminating the irrelevant factors such as the grains of sand and biology in deposit high spectrum image
As a result influence.Image segmentation is carried out to extracting effective color using fractional spins, mean shift segmentation algorithm scheduling algorithm.
(4) in a computer, according to the demand of monitoring deposit different material content, it is pre- that spectrum is carried out to high-spectral data
Processing.Pretreated spectra is included without pretreatment, spectrum area's selection, smooth derivation, SNV, MSC, normalization scheduling algorithm.
(5) in a computer, according to the demand of monitoring deposit different material content, high-spectral data is selected different
Characteristic wave bands.Characteristic wave bands selection is included using successive projection algorithm（SPA）, without information variable elimination algorithm（UVE）, heredity calculate
Method（GA）Method scheduling algorithm.
(6) in a computer, according to the demand of monitoring deposit different material content, by each pixel of high spectrum image
The spectrum substitution of point is had been established in model, if the sediment sample to be measured of acquisition and the sample that model has been established are same position,
It can then be directly substituted into the model；If the sediment sample to be measured of acquisition and the sample of model has been established not in same position,
It after first carrying out Model transfer to sediment sample to be measured, then substitutes into the model, obtains the sediment sample different depth in real time
Each content of material prediction result.
It is by gathering several sediment samples, and to the change of its measure spectrum data and required substance that model, which has been established,
Value, by 2:Sediment sample is divided into modeling collection and inspection set by 1 ratio, using Partial Least Squares to the light of modeling collection sample
Modal data and chemical score establish corresponding model, and carry out forecast test to the model of foundation with inspection set, if the model modeling collection
R2 is satisfied by with inspection set absolute coefficient>0.8, and meet relation analysis error RPD values>1.5, then the model can be used as it is above-mentioned
There is model.
Model transfer using segmentation directly correction by sediment sample spectroscopic data to be measured by combining linear interpolation（PDS-
LI）, segmentation directly correction is with reference to slope/intercept revised law（PDS -S/B）Scheduling algorithm is converted, and obtains transformed data.
Prediction result shows that a kind of content for each point of the inverting deposit is shown respectively with diagram form in two forms
Show the distribution of core sediments each content of material, another kind be the prediction content for each putting core sediments in table form
Display.
In above step, deposit different material content includes total phosphorus, total nitrogen, copper, mercury equal size.
The technical program is based on high light spectrum image-forming technology, monitors each content of material of marine sediment section in real time.Spectrum skill
Art can quickly, accurately, in real time carry out each content of material of deposit pre- while can characterize different material information
It surveys.High light spectrum image-forming technology not only has the advantages that spectral technique analysis, additionally it is possible to get image, to the section of deposit into
Row analysis, the content of each substance of different depth deposit can be obtained by one-shot measurement simultaneously, simpler, quick, convenient
Realization each content of material of different depth deposit real-time measurement, in real time obtain the multiple points of each substance of deposit content.With
The prior art is compared, and this method reduces the time of deposit content of material measurement while ensure that measurement result, saves people
Power material resources.
Description of the drawings
Fig. 1：High light spectrum image-forming technology monitors the method flow diagram of marine sediment section content of material in real time；
Fig. 2：Embodiment core sediments TC（Total charcoal）Content distribution；
Fig. 3：Embodiment core sediments TN（Total nitrogen）Content distribution；
Fig. 4：Embodiment TC（Total charcoal）Content measured value and predicted value comparison diagram；
Fig. 5：Embodiment TN（Total nitrogen）Content measured value and predicted value comparison diagram.
Specific embodiment
With reference to attached drawing 1-5, technical scheme is described in further detail：
The method that high light spectrum image-forming technology monitors marine sediment section content of material in real time, to predict that a certain regional deposit is total
Charcoal（TC）, total nitrogen（TN）Exemplified by, step is as follows：
(1) high spectrum image is obtained
Its section high spectrum image is obtained to Qingdao somewhere sediment sample, high-spectral data is read, data is passed to computer
In.
(2) graphical analysis
In a computer, according to monitoring deposit different material content demand, using mahalanobis distance method to high spectrum image into
Row space is cut out, and chooses the high spectrum image of the useful space, that is, removes the extraneous background of high spectrum image, effectively high including removing
The problems such as extraneous background of spectrum picture and solution anamorphose.High spectrum image RGB is extracted using fractional spins
Effective information carries out image segmentation, pre- to the later stage in favor of eliminating the irrelevant factors such as the grains of sand and biology in deposit high spectrum image
Surveying result influences.
(3) spectrum analysis
In a computer, according to the demand of monitoring deposit different material content, spectrum Spectral range is 226-974nm, feature
Wave band chooses all band.
(4) differentiate sample to be tested whether with model sample has been established as the same area
Through differentiating, sample to be tested is with having been established model sample as the same area.
(5) substitute into and have in model, obtain prediction result
By treated, spectrum substitutes into established model（TC models, TN models）In, sample and the sample to be tested of the model exist
The same area, therefore Model transfer is not required.The evaluation effect for having model see the table below：
| Modeling collection R2 | Inspection set R2 | RPD | |
| TC | 0.938 | 0.933 | 3.477 |
| TN | 0.940 | 0.944 | 3.563 |
Table 1 has the effect assessment of model
Predicted value will be obtained, inversion chart is as Figure 2-3 after model has been established in the substitution of treated spectrum.
(6) inversion result is verified
Inversion prediction value and measured value compare as illustrated in figures 4-5, from Fig. 4-5, predicted value and measured value very close to, simply,
Quickly, required data are easily obtained, are used manpower and material resources sparingly, solve problem of the prior art, it was demonstrated that this method takes
Obtained unexpected advantageous effect.
Embodiment only illustrates technical scheme rather than carries out any restrictions to it；Although with reference to the foregoing embodiments
The present invention is described in detail, it for those of ordinary skill in the art, still can be to previous embodiment institute
The technical solution of record modifies or carries out equivalent substitution to which part technical characteristic；And these modifications or substitutions, and
The essence of appropriate technical solution is not made to depart from the spirit and scope of claimed technical solution of the invention.
Claims (10)
1. the method that high light spectrum image-forming technology monitors marine sediment section content of material in real time, which is characterized in that including following
Step：
(1) sediment sample is gathered, obtains its section high spectrum image, high-spectral data is read, data is passed to computer；
(2) carry out space to high spectrum image to cut out, choose the high spectrum image of the useful space；
(3) extract color effective information and carry out image segmentation；
(4) according to the demand of monitoring deposit different material content, spectrum analysis is carried out to high-spectral data；
(5) according to the demand of monitoring deposit different material content, the spectrum of each pixel of high spectrum image is substituted into
Have in model, obtain each content of material prediction result of the sediment sample in deposit different depth in real time.
2. the method that high light spectrum image-forming technology according to claim 1 monitors marine sediment section content of material in real time,
It is characterized in that, the spectrum analysis of step (4) includes the demand according to monitoring deposit different material content, to high-spectral data
It carries out Pretreated spectra and/or selects different characteristic wave bands.
3. the method that high light spectrum image-forming technology according to claim 2 monitors marine sediment section content of material in real time,
It is characterized in that：Pretreated spectra is using spectrum area's selection, smooth derivation, SNV, MSC or normalization algorithm.
4. marine sediment section content of material is monitored according to any high light spectrum image-forming technologies of claim 1-3 in real time
Method, it is characterised in that：Spatial reference is carried out to image using mahalanobis distance method or minimum distance method in step (2).
5. marine sediment section content of material is monitored according to any high light spectrum image-forming technologies of claim 1-3 in real time
Method, it is characterised in that：The effective color of fractional spins or mean shift segmentation algorithm to extraction is used in step (3)
Carry out image segmentation.
6. marine sediment section content of material is monitored according to any high light spectrum image-forming technologies of claim 2-3 in real time
Method, it is characterised in that：In the step (4), characteristic wave bands selection is using successive projection algorithm（SPA）, disappear without information variable
Except algorithm（UVE）Or genetic algorithm（GA）Method.
7. marine sediment section content of material is monitored according to any high light spectrum image-forming technologies of claim 1-3 in real time
Method, it is characterised in that：In the step (5), existing model is built by several sediment samples in same Spectral range
It is vertical, if sediment sample and existing model sample in same geographical location, are directly substituted into the model；If sediment sample
With existing model sample not in same geographical location, then Model transfer first is carried out to sediment sample, then substituted into the model.
8. marine sediment section content of material is monitored according to any high light spectrum image-forming technologies of claim 1-3 in real time
Method, it is characterised in that：In the step (5), prediction result is shown in two forms, and one kind is each point of the inverting deposit
Content, show that each content of material of core sediments is distributed respectively with diagram form；Another kind is by each point of core sediments
Prediction content show in table form.
9. marine sediment section content of material is monitored according to any high light spectrum image-forming technologies of claim 1-3 in real time
Method, it is characterised in that：In step (1), the sediment sample of acquisition is hemipelagic sediment, neritic sediment or absmal deposit
Object, the high spectrum image shot according to sediment depth needs.
10. marine sediment section content of material is monitored according to any high light spectrum image-forming technologies of claim 1-3 in real time
Method, it is characterised in that：Deposit substance is total phosphorus, total nitrogen, total charcoal, copper or mercury.
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Address after: 266200, Qingdao, Shandong, Qingdao, Qingdao, the core of the blue Silicon Valley, blue Silicon Valley business center, phase one, building No. 1. Applicant after: Inst. of Marine Apparatus & Instruments, Shandong Prov. Academy of Sciences Address before: 266071 Shandong city of Qingdao province Zhejiang City Road No. 28 Applicant before: Inst. of Marine Apparatus & Instruments, Shandong Prov. Academy of Sciences |
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Application publication date: 20180518 |