CN109410139A - Inside a kind of historical relic and surface disease digital assay appraisal procedure - Google Patents
Inside a kind of historical relic and surface disease digital assay appraisal procedure Download PDFInfo
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- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
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- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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Abstract
The invention discloses a kind of historical relic inside and surface disease digital assay appraisal procedures, the disease position on inside historical relic and surface can be subjected to continuous scanning, and then the image of acquisition is handled and is analyzed the shape of the area for obtaining surface and internal defect, defect center-of-mass coordinate and defect, it allows the operator to be clearly seen that disease position；Then the historical relic internal image that the cultural artifact surface image and tomography surface sweeping obtained to 3-D scanning obtains is fitted, then the texture of cultural artifact surface, the threedimensional model of color character and internal structure are restored by three-dimensional reconstruction reverse engineering design, to show its cultural artifact surface and internal disease position and disease range, and the three-dimensional reconfiguration system of disease is rendered as three-dimensional PDF document.
Description
Technical field
The present invention relates to digital with surface disease inside a kind of cultural relic diseases analyzing evaluation method more particularly to a kind of historical relic
Change analyzing evaluation method.
Background technique
China is that a time-honored ancient civilized country produces many kinds of, product in the very long historical progress in China
Kind and its historical relic abundant.But these historical and cultural heritages of the remote past all undergo difference as time goes by
There are some damaged and diseases mostly due to itself material and condition of storage in the destruction and damage of degree.Lead to historical relic
Generating disease, mainly there are two the factors of aspect: environment locating for the physicochemical property and historical relic of historical relic material itself.Either
Underground historical relic, field cultural relic or cultural relics in the collection of cultural institution, can preserve, be heavily dependent on their erosion-resisting energy
Power and locating environmental condition, and these damaged and diseases are often subtle and are not easy to observe.
Usually used at present is to propose one kind by Mr. Oddy of British Museum within 1973 to be known as " Oddy method "
The detection method of historical relic, this method lead flake, copper sheet, silver strip are popped one's head in as detection etchant gas.By piece of metal piece when experiment
It is placed in test bottle with specimen material, while being put into 1mL pure water (relative humidity is high).Assay flask is fully sealed, and is warmed to 60 DEG C,
Heat preservation 28 days.Each test is repeated twice.Primary blank sample is made in test every time, then carries out visually rank to test result.Such as
Metal testing plate erosion caused by fruit specimen material is not more than the erosion on blank test metal testing plate, then material is qualified
's.Other than observing evaluation of corrosion degree, people can be also allowed substantially to understand specimen material release simultaneously the corrosion of metal testing plate
Etchant gas, such as sulfide corrosion silver strip；Organic acid, aldehydes corrode lead flake；Chloride, oxide, sulfide corrosion copper sheet,
Other gases can also cause the corrosion of test piece.One inconvenience of Oddy method is that test period is long, needs 28 days, in addition
Corrosion results are assessed by manually estimating.
The present invention provides inside a kind of historical relic and surface disease digital assay appraisal procedure, using 3-D scanning technology and
The advantage reduction cultural relic diseases structure of the high-acruracy survey of layer scanning technology and accurate-size, the elaborate position of broken parts
In order to which subsequent finer work is carried out.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide inside a kind of historical relic and surface disease digital assay
The disease position on inside historical relic and surface can be carried out continuous scanning by appraisal procedure, and then to the image of acquisition at
Reason and analysis obtain the shape of the area on surface and internal defect, defect center-of-mass coordinate and defect, enable operator
Enough it is clearly seen that disease position.
To achieve the above object, the technical solution of the invention is as follows: inside a kind of historical relic and the digitlization point of surface disease
Analyse appraisal procedure, it is characterised in that: this method comprises:
3-D scanning is carried out to cultural artifact surface using three-dimensional coordinate measuring instrument and close shot video camera and closely images and stores figure
Picture optimizes processing to the noise and retroreflective regions that influence characteristics of image, and the surface for enhancing image by digitized processing is flat
Then slippery and edge sharpening use the color of focusing solutions analysis cultural artifact surface, carry out image line to the historical relic that analysis is completed
The analysis for managing feature, matches the image texture characteristic after optimization, convenient for subsequent to the successional of cultural artifact surface texture
Analysis, the continuity of cultural artifact surface texture and color character is judged using identification technology, and be smoothly connected area to cultural artifact surface is non-
The edge in domain carries out registration matching primitives, is analyzed by continuity of the computer to cultural artifact surface, by historical relic after analysis
Surface image is stored；
3-D scanning is carried out to historical relic using tomographic apparatus, figure is carried out by greyscale transform process to the faultage image of acquisition
Then image intensifying carries out binary conversion treatment to the image after image enhancement by Binarization methods, then lacks to image inside
Area, defect mass center and defect shape is fallen into be calculated and stored；
The historical relic internal image that the cultural artifact surface image and tomography surface sweeping obtain to 3-D scanning obtains is fitted, and is then passed through
Three-dimensional reconstruction reverse engineering design restores the threedimensional model of the texture of cultural artifact surface, color character and internal structure, to be in
Reveal its cultural artifact surface and internal disease position and disease range；
The location and shape of cultural relic diseases structure and broken parts are restored, and the three-dimensional reconfiguration system of disease is rendered as three-dimensional
PDF document.
As a further improvement of the present invention, it is described using three-dimensional coordinate measuring instrument and close shot video camera to cultural artifact surface into
Row 3-D scanning and short distance image and store image specifically when using three-dimensional laser scanner scanning cultural artifact surface, comprehensive
Using different types of three-dimensional laser scanning system, whole control is carried out with millimetre-sized spatial digitizer, with submillimeter level
Spatial digitizer carries out local data's acquisition, then in conjunction with close-range photogrammetry, realizes that the whole of cultural artifact surface information is left and taken.
It is further limited as what 3-D scanning and short distance imaged, firstly, being swashed using grade and submillimeter level three-dimensional
Optical scanning instrument obtains the intensive point data of historical relic entirety, is compared by multidate point data, obtains cultural artifact surface partial structurtes
Deformation and defect shape；Then, using close-range photogrammetry, the image of historical relic is obtained by way of projection or texture expansion
Figure, by the slight change of image recognition technology detection texture color.
As a further improvement of the present invention, it is used in described image identification technology method particularly includes: be to close first
Scape image is corrected and pre-processes, and obtains the calibration image of cultural artifact surface, then extracts the corresponding light of certain pixel in image
Then spectral curve carries out PCA dimension-reduction treatment to image, image is reduced to 3 dimensions, using being based on as the spectral signature at the point
The feature extractor of CNN carries out the extraction of feature, using the feature extracted as space characteristics, finally by spectral signature and space
Feature carries out fusion linear feature and forms spectrum-sky characteristic set, use SVM as classifier classified to obtain cultural artifact surface it
Between the successional result of color.
As a further improvement of the present invention, optimizing processing to the noise and retroreflective regions that influence characteristics of image includes
Main includes point cloud, noise reduction except superfluous, data segmentation, filtering, spots cloud optimization processing.
As a further improvement of the present invention, the continuity judgment method of the surface texture between cultural artifact surface specifically uses
Following method: firstly, statistics angle point quantity: one arc length threshold values A of design is as the standard compared, by flat between data point
The weighting of equal arc length obtains A value；When the neighbor distance of continuous multiple points is continuously less than or equal to A, then being considered as the region, there are 1
A angle point, and the data point in angle steel joint region is marked；
Then, reject the redundant points in Texture Points cloud: one angle threshold values B of design calculates adjacent 3 points Pti-1、Pt、Pti+1, 1
The angle a of two vectors composed by≤i≤N-1i, wherein N is the positive integer greater than 1, if aiIt, then will be intermediate greater than threshold values B
Data point Pt is deleted, until all offset points carry out differentiation completion；
Finally, connection whole story endpoint Pt0PtN-1, each point is calculated to line distance hi, and calculate the number with angle point label
Strong point PtiWith adjacent two data point Pti-1、Pti+1The gained angle a of composed two vectorsi, with intermediate data points distance
hiRatio ai/hi, there is minimum value min(ai/hi) intermediate data points be 1 known angle point, delete adjacent area data
The angle point label of point, complex texture section is split, and subtract 1 for angle point counter, continues this to new texture section
Step often judges that an angle point, counter subtract 1, differentiates until counter is kept to 0 stopping.
The main purpose for carrying out image enhancement processing to the original historical relic inner scanning image acquired in the present invention is
Original unsharp internal flaw is apparent from by the local characteristics in prominent faultage image, and different objects are special in enlarged image
Difference between sign makes to enhance the differentiation between different piece in image, obscures the feature of irrelevant portions, present a contrast pair
Than so that the parts of images quality for needing to study in image, information content are more abundant, thus more efficiently and effectively to reinforcement part
Divide and identified, reach the demand to image analysis research, reinforces internal flaw interpretation and recognition effect.
Greyscale transformation image processing techniques is carried out in spatial domain, and spatial domain processing can be expressed from the next:
G (x, y)=T [f (x, y)], wherein f (x, y) is input picture, and g (x, y) is the image after processing, and T is in point (x, y)
Field on a kind of operator about f for defining, operator can be applied to independent image or image collection, in one width figure of spatial domain
A neighborhood as in about point (x, y), from a pixel to one other pixel, movement is defeated to generate one in the picture for neighborhood
Image out, processing step are as follows:
1) neighborhood origin first shifts to one other pixel from a pixel, to the pixel application operator T in neighborhood, and produces in the position
Raw output exports value of the image g at these coordinates and is equal to (x, y) being original in f for the position (x, y) being arbitrarily designated
The result of neighborhood of a point application operator T；
2) origin of neighborhood continuously moves to next position, and the circulating repetition above process can generate next output image g
Value, the process are first since the upper left position of input picture, are then handled pixel-by-pixel in a manner of horizontal sweep, often
Secondary a line.
The specifically used inverse transform of grey scale change in the present invention, available tonal range are the piece image of [0, L-1]
Reverse image, which is given by: s=L-1-r；Make the gray level for inverting piece image in this way, it can be with
The egative film of equivalent photo is obtained, this seed type is used in particular for enhancing embedded white or grey in the dark areas of piece image
Details, especially when occupying an leading position in black area size.
After image enhancement, the historical relic internal image defect for the ease of obtaining to tomoscan is highlighted, and will be schemed
As the gray value of upper pixel is set as 0 or 255, that is, whole image is showed into apparent black and white effect, thus more
Add and significantly highlights internal flaw.
On the basis of image enhancement, binary conversion treatment is carried out to image；Binary conversion treatment is specifically chosen most in the present invention
Big Ostu method.
The gray scale of 256 brightness degrees is handled by choosing threshold values appropriate in binarization, so as to
Obtain the image of reflection image local or global feature；In image procossing, binary conversion treatment image analyzes subsequent image
Very important effect.
Firstly, image binaryzation process can effectively prepare for being further processed for image, image is made there was only 0 He
255 two states reduce data volume, and can highlight the objective contour to be obtained；Secondly, processing and analysis of binary figure
The premise of picture is that gray level image is first carried out binary conversion treatment, binary image can be just got, be conducive to do image in this way
The set property of subsequent analysis, image is only related with the position of point that pixel value is 0 or 255, does not further relate to the multistage of pixel
Value makes processing become simple, and data processing and decrement it is small.
The binary conversion treatment of image is exactly that the gray scale of the point on image is set to 0 or 255, and all gray scales are greater than or equal to valve
The pixel of value is defined as wanting highlighted part, and gray value is 255 expressions, and the pixel of rest part is then identified as
Other than region, gray value sets 0, indicates background or and uninterested region.Namely say that whole image shows significantly
Black and white effect.Ideal bianry image in order to obtain, the region that the general boundary definition using closing, connection does not overlap.
After image binaryzation is handled, inside historical relic, the black hole got is exactly the defect inside historical relic；
By calculating in internal flaw black region you can get it historical relic for statistical analysis to historical relic internal flaw elemental area
Defect area, defect mass center and the defect shape data of portion's defect.
The defect area to inside image, defect mass center and defect shape, which are calculated, specifically to be obtained inside historical relic
Tomoscan image internal flaw, loops through the boundary of each connected region, then calculates defect boundary institute envelope surface product and mark
Note defect mass center simultaneously seeks defect center-of-mass coordinate；Then each closure defect boundary of circular treatment, obtains boundary coordinate, and calculating is retouched
The points for stating enclosed region boundary obtain the shape of defect.
As a further improvement of the present invention, the tomography thin layer acquisition method includes CT equipment acquisition data, three-dimensional reconstruction
Mold is generated with 3D printing, and CT equipment acquisition data are that historical relic is carried out to thin layer scanning storage, then inverse by three-dimensional reconstruction
Internal structure threedimensional model is restored to engineering design, mold is generated by 3D printing technique.
As a further improvement of the present invention, tomography thin layer acquisition method is specifically with the following method: being set using tomoscan
It is standby that thin layer scanning storage is carried out to historical relic, segmentation result is inputted, and the dividing method appropriate according to image feature selection, is utilized
Segmentation result constructs contour surface；Then, two-dimensional slice image is analyzed and is handled, a series of two dimensions that scanning obtains are cut
Picture constructs 3D data volume by tomography interpolation, and three-dimensional data, which uses, has the identifiable stl file of rapid prototyping system
Format.
As a further improvement of the present invention, CT equipment includes sweep test, computer system and image display storage system
System；The sweep test is made of X-ray tube, detector and scanning support；The computer system is will to scan the information being collected into
Data carry out storage operation；Described image shows that storage system is will to show through computer processing, the image rebuild in TV screen
It goes up and is stored in hard disk.
As a further improvement of the present invention, the three-dimensional reconstruction reverse engineering design is reverse by carrying out to historical relic structure
Analysis, so that the internal structure of historical relic is deduced and obtain, so that the continuity to historical relic internal structure is assessed.
Wherein, three-dimensional reconstruction reverse engineering design is a kind of product design technology reproducing processes, i.e., to a target product
Conversed analysis and research are carried out, to deduce and obtain process flow, institutional framework, functional characteristic and the technical specification of the product
Equal design elements, to produce similar product.
Wherein, it is accurately and fast to process out by 3D model using 3D printer that 3D printing technique, which generates mold,
Mold.
The present invention carries out continuous scanning by disease position to historical relic inside and surface, and then to the image of acquisition into
Row processing and the shape for analyzing the area for obtaining surface and internal defect, defect center-of-mass coordinate and defect, so that operator
Member can be clearly seen that disease position；Then the historical relic that the cultural artifact surface image and tomography surface sweeping obtained to 3-D scanning obtains
Internal image is fitted, then by three-dimensional reconstruction reverse engineering design restore the texture of cultural artifact surface, color character and
The threedimensional model of internal structure, to show its cultural artifact surface and internal disease position and disease range, and by disease
Three-dimensional reconfiguration system is rendered as three-dimensional PDF document.
The beneficial effects of the present invention are:
1, the present invention takes 3-D scanning technology and layer scanning technology to cultural artifact surface inside analysis assessment historical relic when disease
It is scanned with inside, reverse engineering design is then rebuild by 3D again and restores cultural artifact surface and internal structure three-dimensional mould
Type, to show its internal disease position and disease range；Data after scanning generate mould by 3D printing technique
Tool, the remanufactured component made in this way can fit like a glove with original section, lay the foundation for accurate reparation.
2, the present invention passes through firstly, obtaining the close of historical relic entirety using grade and submillimeter level three-dimensional laser scanner device
Collect point cloud data, is compared by multidate point cloud data, obtain the deformation and defect shape of historical relic partial structurtes；Then, it uses
Close-range photogrammetry is obtained the orthophotoquad of historical relic by way of projection or texture expansion, examined by image recognition technology
The slight change of texture color is surveyed, these greatly facilitate the non-matching for being smoothly connected region of subsequent cultural artifact surface, improve
Accuracy of the computer to cultural artifact surface defect recognition.
3, the present invention uses tomography thin layer acquisition method, and the thin layer of acquisition is acquired with CT equipments more than 128 rankings
(0.1MM) data carry out three-dimensional reconstruction in conjunction with three-dimensionalreconstruction reverse software, restore the essence of cultural relic diseases structure and broken parts
Object staff cun, elaborate position are carried out in order to subsequent finer work；The three-dimensional reconfiguration system of final disease can be rendered as three-dimensional
PDF document is also convenient for exchanging, mapping and archive management.
Specific embodiment
The present invention and its specific embodiment are described in further detail below.
Inside a kind of historical relic and surface disease digital assay appraisal procedure, this method comprises:
3-D scanning is carried out to cultural artifact surface using three-dimensional coordinate measuring instrument and close shot video camera and closely images and stores figure
Picture optimizes processing to the noise and retroreflective regions that influence characteristics of image, and the surface for enhancing image by digitized processing is flat
Then slippery and edge sharpening use the color of focusing solutions analysis cultural artifact surface, carry out image line to the historical relic that analysis is completed
The analysis for managing feature, matches the image texture characteristic after optimization, convenient for subsequent to the successional of cultural artifact surface texture
Analysis, the continuity of cultural artifact surface texture and color character is judged using identification technology, and be smoothly connected area to cultural artifact surface is non-
The edge in domain carries out registration matching primitives, is analyzed by continuity of the computer to cultural artifact surface, by historical relic after analysis
Surface image is stored；
Three-dimensional tomographic is carried out to historical relic using tomography thin layer acquisition method, greyscale transform process is passed through to the faultage image of acquisition
Image enhancement is carried out, binary conversion treatment then is carried out to the image after image enhancement by Binarization methods, then in image
Defect area, defect mass center and the defect shape in portion are calculated and are stored；
The historical relic internal image that the cultural artifact surface image and tomography surface sweeping obtain to 3-D scanning obtains is fitted, and is then passed through
Three-dimensional reconstruction reverse engineering design restores the threedimensional model of the texture of cultural artifact surface, color character and internal structure, to be in
Reveal its cultural artifact surface and internal disease position and disease range；
The location and shape of cultural relic diseases structure and broken parts are restored, and the three-dimensional reconfiguration system of disease is rendered as three-dimensional
PDF document.
Wherein, 3-D scanning is carried out to cultural artifact surface using three-dimensional coordinate measuring instrument and close shot video camera and closely imaged
And store image and be specifically: when using three-dimensional laser scanner scanning cultural artifact surface, comprehensively utilizing different types of three-dimensional sharp
Photo-scanning system, carries out whole control with millimetre-sized spatial digitizer, carries out local number with the spatial digitizer of submillimeter level
According to acquisition, then in conjunction with close-range photogrammetry, realize that the whole of cultural artifact surface information is left and taken.
Wherein, 3-D scanning is carried out to cultural artifact surface using three-dimensional coordinate measuring instrument and close shot video camera and closely imaged
And store image concrete operations and be: firstly, it is whole to obtain historical relic using grade and submillimeter level three-dimensional laser scanner device
Intensive point data is compared by multidate point data, obtains the deformation and defect shape of cultural artifact surface partial structurtes；Then, it adopts
With close-range photogrammetry, the striograph of historical relic is obtained by way of projection or texture expansion, is detected by image recognition technology
The slight change of texture color.
Wherein, it is used in image recognition technology method particularly includes: it is that close shot image is corrected and is pre-processed first,
Obtain the calibration image of cultural artifact surface, then extract image in the corresponding curve of spectrum of certain pixel as the Spectral Properties at the point
Then sign carries out PCA dimension-reduction treatment to image, image is reduced to 3 dimensions, carry out feature using the feature extractor based on CNN
It extracts, using the feature extracted as space characteristics, spectral signature and space characteristics is finally subjected to fusion linear feature and formed
Spectrum-sky characteristic set, uses SVM to be classified to obtain the result of color continuity between cultural artifact surface as classifier.
Wherein, to the noise and retroreflective regions that influence characteristics of image to optimize processing include main include a point cloud,
Noise reduction is except superfluous, data segmentation, filtering, spots cloud optimization processing.
Wherein, binary conversion treatment is specifically chosen maximum variance between clusters.
Wherein, defect area, defect mass center and the defect shape inside image are calculated and is stored specifically: being obtained
Tomoscan image internal flaw inside historical relic, loops through the boundary of each connected region, then calculates defect boundary and is enclosed
Area and marking of defects mass center simultaneously seek defect center-of-mass coordinate；Then each closure defect boundary of circular treatment obtains boundary and sits
Mark, calculate description enclosed region boundary points, obtain the shape of defect, finally to inside the image sought defect area,
Defect mass center and defect shape data are stored.
Wherein, tomography thin layer acquisition method includes that CT equipment acquisition data, three-dimensional reconstruction and 3D printing generate mold, the CT
Devices collect data is historical relic to be carried out thin layer scanning storage, then restore internal structure by three-dimensional reconstruction reverse engineering design
Threedimensional model generates mold by 3D printing technique.
Wherein, tomography thin layer acquisition method is specifically with the following method: carrying out thin layer to historical relic using tomographic apparatus and sweeps
Storage is retouched, segmentation result is inputted, and the dividing method appropriate according to image feature selection, is constructed using segmentation result equivalent
Face；Then, two-dimensional slice image is analyzed and is handled, a series of two-dimensional slice images that scanning obtains are inserted by tomography
Value construction 3D data volume, three-dimensional data, which uses, has the identifiable stl file format of rapid prototyping system.
Wherein, tomographic apparatus includes that sweep test, computer system and image show storage system；The scanner section
Divide and is made of X-ray tube, detector and scanning support；The computer system is that the information data for being collected into scanning carries out storage fortune
It calculates；Described image shows that storage system is to show on TV screen the image for handling, rebuilding through computer and be stored in hard disk
In.
The present invention carries out continuous scanning by disease position to historical relic inside and surface, and then to the image of acquisition into
Row processing and the shape for analyzing the area for obtaining surface and internal defect, defect center-of-mass coordinate and defect, so that operator
Member can be clearly seen that disease position；Then the historical relic that the cultural artifact surface image and tomography surface sweeping obtained to 3-D scanning obtains
Internal image is fitted, then by three-dimensional reconstruction reverse engineering design restore the texture of cultural artifact surface, color character and
The threedimensional model of internal structure, to show its cultural artifact surface and internal disease position and disease range, and by disease
Three-dimensional reconfiguration system is rendered as three-dimensional PDF document.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of historical relic inside and surface disease digital assay appraisal procedure, it is characterised in that: this method comprises:
3-D scanning is carried out to cultural artifact surface using three-dimensional coordinate measuring instrument and close shot video camera and closely images and stores figure
Picture optimizes processing to the noise and retroreflective regions that influence characteristics of image, and the surface for enhancing image by digitized processing is flat
Then slippery and edge sharpening use the color of focusing solutions analysis cultural artifact surface, carry out image line to the historical relic that analysis is completed
The analysis for managing feature, matches the image texture characteristic after optimization, convenient for subsequent to the successional of cultural artifact surface texture
Analysis, the continuity of cultural artifact surface texture and color character is judged using identification technology, and be smoothly connected area to cultural artifact surface is non-
The edge in domain carries out registration matching primitives, is analyzed by continuity of the computer to cultural artifact surface, by historical relic after analysis
Surface image is stored；
Three-dimensional tomographic is carried out to historical relic using tomography thin layer acquisition method, greyscale transform process is passed through to the faultage image of acquisition
Image enhancement is carried out, binary conversion treatment then is carried out to the image after image enhancement by Binarization methods, then in image
Defect area, defect mass center and the defect shape in portion are calculated and are stored；
The historical relic internal image that the cultural artifact surface image and tomography surface sweeping obtain to 3-D scanning obtains is fitted, and is then passed through
Three-dimensional reconstruction reverse engineering design restores the threedimensional model of the texture of cultural artifact surface, color character and internal structure, to be in
Reveal its cultural artifact surface and internal disease position and disease range；
The location and shape of cultural relic diseases structure and broken parts are restored, and the three-dimensional reconfiguration system of disease is rendered as three-dimensional
PDF document.
2. by a kind of historical relic inside and surface disease digital assay appraisal procedure described in claim 1, it is characterised in that: described
It carries out 3-D scanning to cultural artifact surface using three-dimensional coordinate measuring instrument and close shot video camera and closely images and store image to have
Body is: when using three-dimensional laser scanner scanning cultural artifact surface, comprehensively utilizing different types of three-dimensional laser scanning system, uses
Millimetre-sized spatial digitizer carries out whole control, carries out local data's acquisition with the spatial digitizer of submillimeter level, then ties
Close-range photogrammetry is closed, realizes that the whole of cultural artifact surface information is left and taken.
3. by a kind of historical relic inside and surface disease digital assay appraisal procedure described in claim 2, it is characterised in that: first
First, the intensive point data that historical relic entirety is obtained using grade and submillimeter level three-dimensional laser scanner device, passes through multidate point
Data comparison obtains the deformation and defect shape of cultural artifact surface partial structurtes；Then, using close-range photogrammetry, pass through projection
Or the mode of texture expansion obtains the striograph of historical relic, by the slight change of image recognition technology detection texture color.
4. by a kind of historical relic inside and surface disease digital assay appraisal procedure described in claim 1, it is characterised in that: described
It is used in image recognition technology method particularly includes: be that close shot image is corrected and is pre-processed first, obtain cultural artifact surface
Calibration image, then extract image in the corresponding curve of spectrum of certain pixel as the spectral signature at the point, then to figure
As carrying out PCA dimension-reduction treatment, image is reduced to 3 dimensions, the extraction of feature is carried out using the feature extractor based on CNN, will be extracted
Spectral signature and space characteristics are finally carried out fusion linear feature and form spectrum-sky feature set by feature out as space characteristics
It closes, SVM is used to be classified to obtain the result of color continuity between cultural artifact surface as classifier.
5. by a kind of historical relic inside and surface disease digital assay appraisal procedure described in claim 1, it is characterised in that: described
Optimizing processing to the noise and retroreflective regions that influence characteristics of image includes mainly including point cloud, noise reduction except superfluous, data
Segmentation, filtering, spots cloud optimization processing.
6. by a kind of historical relic inside and surface disease digital assay appraisal procedure described in claim 5, it is characterised in that: described
Binary conversion treatment is specifically chosen maximum variance between clusters.
7. by a kind of historical relic inside and surface disease digital assay appraisal procedure described in claim 1, it is characterised in that: described
Defect area, defect mass center and defect shape inside image is calculated and is stored specifically: obtaining tomography inside historical relic
Scan image internal flaw loops through the boundary of each connected region, then calculates defect boundary institute envelope surface product and label lacks
It falls into mass center and seeks defect center-of-mass coordinate；Then each closure defect boundary of circular treatment obtains boundary coordinate, calculates description and closes
The points for closing zone boundary, obtain the shape of defect, finally to defect area, defect mass center and the defect inside the image sought
Shape data is stored.
8. by a kind of historical relic inside and surface disease digital assay appraisal procedure described in claim 1, it is characterised in that: described
Tomography thin layer acquisition method includes that CT equipment acquisition data, three-dimensional reconstruction and 3D printing generate mold, and the CT equipment acquires data
It is historical relic to be subjected to thin layer scanning storage, then internal structure threedimensional model is restored by three-dimensional reconstruction reverse engineering design, by
3D printing technique generates mold.
9. by a kind of historical relic inside and surface disease digital assay appraisal procedure described in claim 8, it is characterised in that: described
Tomography thin layer acquisition method is specifically with the following method: carrying out thin layer scanning storage to historical relic using tomographic apparatus, will divide
As a result it inputs, and the dividing method appropriate according to image feature selection, constructs contour surface using segmentation result；Then, to two dimension
Sectioning image is analyzed and is handled, and a series of two-dimensional slice images that scanning is obtained construct three-dimensional data by tomography interpolation
Body, three-dimensional data, which uses, has the identifiable stl file format of rapid prototyping system.
10. by a kind of historical relic inside and surface disease digital assay appraisal procedure described in claim 9, it is characterised in that: disconnected
Layer scanning device includes that sweep test, computer system and image show storage system；The sweep test is by X-ray tube, detection
Device and scanning support composition；The computer system is that the information data for being collected into scanning carries out storage operation；Described image is aobvious
Showing, storage system is that the image for handling, rebuilding through computer is shown on TV screen and is stored in hard disk.
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