CN108362716A - A kind of historical relic material detection determination method and detection device based on Medical CT - Google Patents
A kind of historical relic material detection determination method and detection device based on Medical CT Download PDFInfo
- Publication number
- CN108362716A CN108362716A CN201810237936.4A CN201810237936A CN108362716A CN 108362716 A CN108362716 A CN 108362716A CN 201810237936 A CN201810237936 A CN 201810237936A CN 108362716 A CN108362716 A CN 108362716A
- Authority
- CN
- China
- Prior art keywords
- historical relic
- density
- medical
- image
- determination method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
- G01N2223/04—Investigating materials by wave or particle radiation by transmission and measuring absorption
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
- G01N2223/1016—X-ray
Landscapes
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Toxicology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The present invention relates to field of non destructive testing, solves the technical issues of small movable historical relic is not easy to carry out science detection in the prior art.The technical proposal of the invention is realized in this way：A kind of historical relic material detection determination method based on Medical CT, includes the following steps：A carries out arameter optimization to Medical CT；B-scan water mould carries out CT value calibration；C CT irradiations；D data processings；E results export.A kind of historical relic material detection determination method and detection device based on Medical CT disclosed by the invention are carrying out historical relic detection using the existing advanced imaging means of Medical CT plus image processing techniques；Non-contact, accurate scanning enables us accurately to describe the internal structure of three-dimension object, and three-dimensional reconstruction, partial enlargement, Detail contrast etc. are carried out so as to quantitative determine Density Distribution；So that quick, the credible also more intuitive and convenient of historical relic detection.
Description
Technical field
The present invention relates to field of non destructive testing, particularly relate to a kind of historical relic material detection determination method based on Medical CT
And detection device.
Background technology
The discrimination of Chinese cultural relics Gu device is historical relic, archaeology educational circles, the top priority for collecting educational circles and antiques business circles.Generally
For, people distinguish the true and false of ancient times implements in terms of three：Historical relics material, processing technology and artistic style.Currently, receiving
Tibetan studies circle or even archaeology educational circles are still mainly recognized according to visual experience, in order to obtain more objective reliable conclusion, lossless inspection
Survey the identification for being widely used in ancient times implements.
Historical relic is because its special integrity attribute makes it have higher ornamental values and the economic values, which dictates that historical relic
Detection can not possibly be sampled operation as chemical analysis to historical relic.Currently used verification retrieval/detection method mainly according to
Rely the experience in expert on historical relics, by expert soon, hand is touched, the modes such as ear is listened, nasil are come the true and false of comprehensive descision historical relic, this
Kind mode has larger defect, also be easy to cause dispute.Verification retrieval/detection mode of science refers to passing through scientific instrument
(CT etc.) carries out non-destructive testing cultural artifact surface and internal information, and the attribute of historical relic is determined by obtaining objective data.Text
Object research is obtained from the sensory information on surface, its inner materials, structure, making work are explored towards using high-tech means
The directions such as skill are developed.Since industry CT is expensive, and quantity is few, concentrates on a small number of professional domains；For most of personal next
It says, does not reach these instruments in daily life at all；For some museums, to buy, safeguard and use
These instruments are also more difficult.
For China's number for the relic collection fan in terms of necessarily, how to provide it is a kind of extensively, easily obtain, result
It is a difficult problem that today's society is faced that historical relic credible, that expense is relatively low, which detects/identify channel,.
Invention content
A kind of historical relic material detection determination method and detection device based on Medical CT disclosed by the invention, solve existing
There is the technical issues of middle-size and small-size Movable Cultural Relics of technology are not easy to carry out science detection.
The technical proposal of the invention is realized in this way：A kind of historical relic material detection determination method based on Medical CT, packet
Include following steps：
A carries out arameter optimization to Medical CT：By thickness, layer away from or the visual field make it is scanning focused act on tested historical relic and
Improve the resolution ratio of reconstruction image；
B-scan water mould carries out CT value calibration：Determine whether machine needs to be corrected；Different machines is determined respective
CT reference values；
C CT irradiation historical relics and water mould：
D image procossings：CT images are handled；
E results export：Bubble, hole, loss characteristics and position and the technique of historical relic are judged according to density profile.
Further, the relationship of the thickness described in the step A, layer away from, the visual field and resolution ratio is：
Thickness：Thickness is smaller, and resolution ratio is higher；
Layer away from：Layer is away from less than thickness；
The visual field：Scan rebuilding pixel size=display open country/matrix；The matrix.
Further, the step C includes further including：A reference value is determined according to reference value, using method of comparison, is established
Linear relationship between CT values and historical relic density.
Further, the step D includes the following steps：
D1 image preprocessings：To enhance characteristics of image, information unrelated in image is eliminated, useful true letter is restored
Breath enhances detectability for information about and simplifies data to the maximum extent, to improve feature extraction, image segmentation, matching
With the reliability of identification；
D2 post processing of image：Density conversion is carried out to historical relic CT images, with mapping structure density profile, rebuilds three-dimensional
Profile, mark density abnormal area, extraction area-of-interest.
Further, the step D2 is further comprising the steps of：
A calculates each pixel corresponding density value in CT figures on the basis of CT reference values；
Density value is converted to block diagram or surface chart by b, and identifies discontinuous density value, i.e. hole or damage wherein
Region；
C emulates historical relic threedimensional model.
D is by Density Distribution situation, the uniformity of the distribution situation of historical relic hole and material, to judge historical relic material, work
Skill.
A kind of historical relic detection device based on Medical CT figure disclosed by the invention, including high-resolution CT figures, including with
In to CT scheme to carry out the microprocessor of data processing, for storing historical relic material density, common small-sized historical relic manufacture craft is deposited
Reservoir and for show historical relic threedimensional model, historical relic material, technological process display.
Further, the microprocessor includes the density reconstruction for calculating each pixel in CT figures and corresponding to maximum density values
Module, mark module, the three-dimensional reconstruction module for emulating historical relic threedimensional model for identifying hole and damage region；Institute
Density reconstruction module is stated to connect with memory；The three-dimensional reconstruction module connects display device.
The microprocessor further includes the module of comparison of process flow and technique judgement.
A kind of historical relic material detection determination method and detection device, utilization based on Medical CT disclosed by the invention are medical
The existing advanced imaging means of CT are carrying out historical relic detection plus image processing techniques；Non-contact, accurate scanning enables us
The internal structure of three-dimension object is accurately described, so as to quantitative determine, Density Distribution carries out three-dimensional reconstruction, part is put
Greatly, Detail contrast etc.；So that quick, the credible also more intuitive and convenient of historical relic detection.Make the historical relic of some shape, structures complexity,
It can arbitrarily rotate, different angle carries out comprehensive, globality three dimensional viewing, detailed each position, the corner for understanding all parts
The case where；Realize three-dimensional data reconstruct and display, historical relic can carry out mobile space, rotation, amplification, reduce, cutting, in difference
Position of fault can form new threedimensional model after sectility, realize real-time 3-D view visualization；Three-dimensional measurement is put down
The dimensional measurement in face, space, including internal clearance, thickness, volume, area measurement；Historical relic detection is quick, credible also more straight
It is convenient to see.
Specific implementation mode
Technical solution is clearly and completely described below in conjunction with the embodiment of the present invention, it is clear that described reality
It is only a part of the embodiment of the present invention to apply example, instead of all the embodiments.Based on the embodiments of the present invention, this field
The every other embodiment that those of ordinary skill is obtained without creative efforts, belongs to guarantor of the present invention
The range of shield.
A kind of historical relic material based on Medical CT disclosed in this invention detects determination method, includes the following steps：
A carries out arameter optimization to Medical CT：By thickness, layer away from or the visual field make it is scanning focused act on tested historical relic and
Improve the resolution ratio of reconstruction image；B-scan water mould carries out CT value calibration：Determine whether machine needs to be corrected；To different
Machine determines respective CT reference values；C CT irradiation historical relics and water D image procossings：CT images are handled；E results export：
Bubble, hole, loss characteristics and position and the technique of historical relic are judged according to density profile.
Tuning is carried out to CT parameters, 1. thickness (slice thickness), the slice thickness selected in scanning, is shadow
Ring a key factor of picture resolution.Thickness is small, and image space resolving power is good, but the x-ray photon number that detector receives
It reduces, density resolution declines.Thickness is big, and the light number of words that detector receives increases, and density resolution improves, but space point
Distinguish that power declines.So scanning slice thickness usually on demand observation historical relic position depending on.In order to see process detail clearly, it is necessary to will
Thickness reduces, to improve the test effect to details；2. layer away from (slice gap), refers between the midpoint of two neighboring level
Distance.If layer is away from equal with thickness, for continuous scanning, gapless between each layer.When layer is away from more than thickness, then not connect
It is continuous to scan, there is the place of certain interval not to be scanned into picture between each layer.Discontinuous scanning makes longitudinal space resolving power drop
It is low.If layer is away from less than thickness, for overlapping scan, it is thickness and layer away from its difference that adjacent interlayer, which has overlapping, overlapped thickness,.In this way
The post-processing effect of reconstruction image can be made more preferable, but increase the scanning number of plies, sweep time and X line dosages etc.；3. the visual field is swept
It is wild by the scanner field (scanning field of view, SFOV) of look-out station size selection and display when retouching
(displaying field of view, DFOV) is referred to as the visual field (field of view, FOV).Usually the two size phase
Closely.But display open country can change its size according to the range to be observed, keep the display of reconstruction image apparent, prominent scanning
The details at position.Usually changeable display open country size selects different matrix (matrix) forms to improve the spatial discrimination of image
Power.But the pixel size of reconstruction image is not more than machine inherently resolving power.The size of reconstruction image pixel is wild with display
And the relationship of selected matrix is:
Rebuild pixel size=display open country/matrix
By above formula as it can be seen that the pixel size of reconstruction image and the relationship of matrix and the wild size of display are：When the wild size of display
Constant, when matrix increases, for the pixel value of reconstruction image with regard to small, image space resolving power is good.Such as in the figure that can get same effect
Under the premise of image quality amount, matrix size is constant, and reduces the wild size of display, can also obtain small pixel value, improve image
Spatial resolution, but greatly shorten the reconstruction time of image.
It according to the shape and classification of checked historical relic, needs that suitable parameter is arranged, improves the resolving power and details of image
Test effect.
Since the transmitted intensity and parameter of different CT equipments are different, same historical relic is obtained using different scanning equipment
Go out CT figure and it is different, so using CT identify historical relic when need scan historical relic while add a water mould, by water mould
Image is tested, is evaluated, and the density of the material corresponding to different gray values is found out.
The CT values that Heng Shi defines water are 0Hu, and other different densities materials are all compared with it, and in this way for water mould
Uniform photographed object, the image scanned should be uniform.In the center statistical function of the water mould image scanned
(statistics) circle that a diameter is about 17.8cm, i.e. region of interest (ROI) are drawn, and counts the mean CT-number of ROI
(MEAN) and standard deviation (SD).According to Hounsfield rulers i.e. as unit of HU, the CT values of water should normally be 0HU.Measure water mould
The significance of MEAN is the foundation that it is.For verification retrieval, the MEAN of measured historical relic accurately whether, to text
Object judgement is then vital.So in order to ensure constant picture quality, it is necessary to by X-ray tube, detector and electricity
The measuring system of sub-line road composition is corrected.The noise of CT machine performances is characterized, the quality of image is also influenced.Some noises are
Machine performance itself it is intrinsic, some noises are that parameter selection is not suitable for and causes when using.Noise is mainly by being distributed to
What the limited smooth number of words of image was determined.It is observed on water mould image, noise hour, imaged particles are thin, when noise is big, figure
As particle is thick.The numerical value of noise can be worth standard deviation (SD) to describe with the CT in specific region.It is obtained by testing water mould
Suitable MEAN and SD, the supplement foundation as machine revision.Obtain a reference value of a CT scan condition.Improve identification
Reliability.The module of detection has two kinds of solid water mould and liquid water mould.Liquid water mould is to make cylinder using industrial organic glass
Body is full of distilled water, to serve as homogeneous substance in it.Solid water mould is directly to be made of solid homogenous material, general to use
The equivalent plastics of water.The advantage and disadvantage of two generic modules are as follows：Liquid water mould uniformity is good, but may be had leak danger by Impact factor
Nearly, water CT values are affected by temperature larger, cheaply；Solid water mould uniformity is good, can be portable, and the influence of hand temperature is small, cannot measure water
CT values, it is difficult to find suitable material, it is expensive.
Further, the relationship of the thickness described in the step A, layer away from, the visual field and resolution ratio is：Thickness：Thickness is got over
Small, resolution ratio is higher；Layer away from：Layer is away from less than thickness；The visual field：Scan rebuilding pixel size=display open country/matrix；The matrix.
Further, the step C includes further including：A reference value is determined according to reference value, using method of comparison, is established
Linear relationship between CT values and historical relic density.
Further, the step D includes the following steps：
D1 image preprocessings：To enhance characteristics of image, information unrelated in image is eliminated, useful true letter is restored
Breath enhances detectability for information about and simplifies data to the maximum extent, to improve feature extraction, image segmentation, matching
With the reliability of identification；When studying historical relic, digitalized image can carry out window width and window level adjusting, edge enhances, is positive and negative
A series of pre- places such as gray scale switching, reverse phase, tone separation, brightness, contrast enhancing, grey scale transformation, noise reduction, sharpening, contour
Reason operation makes image be more clear the feature of intuitive reflection implements, finds the detailed information that naked eyes can not be seen clearly.
D2 post processing of image：Density conversion is carried out to historical relic CT images, with mapping structure density profile, rebuilds three-dimensional
Profile, mark density abnormal area, extraction area-of-interest etc..
Further, the step D2 is further comprising the steps of：
A calculates each pixel corresponding density value in CT figures on the basis of CT reference values；Density value is converted to block diagram by b
Or surface chart, and discontinuous density value is identified wherein, i.e. hole or damage region；
C emulates historical relic threedimensional model.
D is by Density Distribution situation, the uniformity of the distribution situation of historical relic hole and material, to judge historical relic material, work
Skill.The features such as bubble, the hole of historical relic, and loss are obtained according to the continuous density value of historical relic, due to the text of various years
Object, there is apparent differences for the density value of material, corrosion area and hole distribution situation, are measured by intuitively accurate
The variable density in region is analyzed to be compared, to inferring that it is larger that the appraisal of historical relic technique and progress next step has
It helps.
The CT values for detecting ingredient are needed to be converted into and control group benchmark phase each detection group with the linear relationship formula in C2
Same CT values, you can the corresponding density for comparing, obtaining a certain pixel into line density is traversed, obtains full text object image
Density conversion figure.
Density conversion figure is mapped to block diagram, curve graph, highlights the situation of change of density value, is detected using cluster
Algorithm detects and calibrates all density anomaly regions.
The reconstruct that corresponding historical relic structure three-dimensional model is carried out to multi-Slice CT scan image, in every layer of two bit scan image
The boundary contour for extracting area-of-interest can obtain one continuously using the zone boundary generation method based on scan line
Closed zone boundary, and the correlation of zone boundary is can make full use of, by the connection to edges of regions point, quickly make
Fixed all closed continuum boundaries together with region.
Calculate the maximum density values corresponding to each pixel in the CT images；By each pixel in affiliated image
Maximum density values are converted into a square column, and the length of the square column corresponds to the maximum density values of the pixel, by column
Figure finds out bubble and hole distribution in historical relic, and loss region, makes a mark, and shift true figure onto from block diagram is counter
Picture, and transformed image is preserved, these features of historical relic can be intuitively found, and industrial analysis is carried out to historical relic, according to density
Come speculate loss situation of historical relic material and historical relic etc. assist identification historical relic.Such as：For same material and type
Historical relic, shown in density map, it should have similar pattern the spy of historical relic is obtained according to different density value sizes
Sign, to help to identify historical relic.
Density is to reflect the physical quantity of substance characteristics, indicates contents in certain substance unit volume at the specified temperature
The mass number of matter, under the conditions of the states of matters such as certain temperature, pressure, a kind of density of substance is changeless, for historical relic
The judgement of material play the role of it is positive, can as identification the historical relic true and false a supplementary means.To one species sample
When carrying out CT detections, the larger standard sample of two density differences is placed on the sample detected every time, after the completion of detection respectively
The CT values of two standard samples are measured, optional one of which as a control group, can mathematically export detection group and control group
CT value reduction formulas, be used in combination this formula by each detection group need detect ingredient CT values be converted into it is identical as control group benchmark
CT values, you can into line density compare.By example calculation, the resultant error for calculating gained is respectively less than 5%, is missed in engineering
Within poor tolerance band.In addition, it should be noted that should select to correspond to identical position and model when CT values measure in practical operation
It encloses, reduction formula precision and measurement accuracy can be improved in this way, reduce measurement error.
The features such as bubble, the hole of historical relic, and loss are obtained according to the continuous density value of historical relic, and to these spies
Sign is identified.Due to the historical relic of various years, there is bright for the density value of material, corrosion area and hole distribution situation
Aobvious difference is compared analysis by the variable density of intuitively accurate measured zone, to infer that historical relic makes work
Skill has larger help to verification retrieval work.
There is density method of comparison using the CT methods for measuring density of material：(density data library) is by measuring known density (mark
Quasi- density) standard sample CT values, establish the linear relationship between CT values and historical relic density, measure the CT values of sample to be tested, ask
Go out the density of sample to be tested.The Density Distribution situation that not only can determine that historical relic using CT defines the Density Distribution of historical relic, detection
The hole distribution situation of historical relic and the uniformity of material help the discriminating work of historical relic to speculate the technique of historical relic.
By the ray attenuation law of penetrating material it is found that projection radiation intensity and the relationship of material density can be written as
Wherein I0 ... incident rays intensity；μ ... line attenuation coefficients, unit is frequently with centimetre -1；μm ... mass attenuation system
Number；T ... projects thickness；ρ ... material densities；N ... scattering ratios；K ... coefficients；The atomic of Z ... substances；λ ... incident ray waves
It is long.Above-mentioned is the relational expression for being mapped when ray passes through pure metals intensity and material density.When object is mixture, if structure
It is W1, W2, W3 ... at the degree of material element, corresponding mass attentuation coefficient is respectively μ 1, μ 2, μ 3 ... then objects
Mass attentuation coefficient be
μm=W1μm1+W2μm2+W3μm3+…(2)
Similarly, transmitted intensity and the relational expression of material density are when ray passes through mixture
For same CT figure, effective wavelength and coefficient are approximately uniform, so having
Due to thering is ρ=Q/V=Q/ (HS), and Wi=Qi/Q, (3) formula to be readily modified as
Q ... substances gross mass in formula；Q1 ... each element weight percents, i=1,2,3 ...；H ... CT figures tomoscan is thick
Degree；The area of the substance on S ... CT figures.Can be intuitive to see by (1), (3) the two relational expressions, transmitted ray intensity with
Material density is not linear ratio relation, but exponential relationship.It is difficult to distinguish difference on the CT figures that this is shown with gray value
The substance of density.The CT images actually observed are by linearization process, after noise reduction process and a series of Mathematical Corrections
Image.CT values and the density of detection object corresponding position substance on CT images have approximately proportional relationship, but not tight
Proportional relationship in lattice meaning, CT values by material density in addition to mainly being influenced, and also by incident ray intensity effect, scanning is thick
The influence of degree, the influence of detector sensitivity and the influence of penetration thickness scan the influence of the area of the substance on tomography
Deng.Incident ray intensity is directly proportional to the product of ray voltages quadratic sum electric current used when detection.
A kind of historical relic detection device based on Medical CT figure disclosed by the invention includes for scheming to carry out data processing to CT
Microprocessor, for storing historical relic material density, the memory of common small-sized historical relic manufacture craft and for showing historical relic three
Dimension module, historical relic material, technological process display.
The microprocessor includes calculating each pixel in CT figures to correspond to the density reconstruction module of maximum density values, be used for
It identifies hole and damages mark module, the three-dimensional reconstruction module for emulating historical relic threedimensional model in region；The density reconstruction
Module is connect with memory；The three-dimensional reconstruction module connects display device.
The microprocessor further includes comparison of process flow and technique determination module.
Medical CT is a kind of multiple functional detection instrument, it is the abbreviation of computerized X-ray tomography technology,
The working procedure of Medical CT is:It according to human body different tissues to the absorption of X-ray and the difference of transmitance, using sensitivity
High instrument measures human body, then will measure acquired data and inputs electronic computer, electronic computer logarithm
After being handled, so that it may photograph human body and be examined the section at position or the image of solid, find the tiny of internal any position
Lesion.
CT is scanned to the certain thickness level of object with x-ray speed, and the x-ray through the level is received by detector,
After being changed into visible light, electric signal is become from opto-electronic conversion, using analog/digital converter, switchs to digital signal, is inputted
Computer disposal.The processing that a kind of image is formed is will to be divided into the identical cuboid of several volumes just like to selected level, is claimed
Be voxel.Scanning gained information is computed and obtains the x-ray attenuation coefficient or absorption coefficient of each voxel, rearranges into square
Battle array, i.e., character matrix, character matrix can be stored in disk or CD.Through digital/analog converter every in character matrix
A number switchs to by the black blockage to the white gray scales such as not, i.e. pixel, and is arranged in a matrix, and constitutes CT images, so CT schemes
Seem reconstruction image, the x-ray absorption coefficient of each voxel can be calculated by different digital methods.
(3) image processing techniques：What is obtained due to CT is digitized image, we can show carries out computer to image
Pre-treatment come replace naked eyes acquire information, then carry out Computer reprocessing again.In terms of photo-interpretation, previous studies people
Member reads antique information from X-ray photographs, relies primarily on the eyes of people, believes by previous experience and the lot of examples of accumulation
Breath carries out interpretation, the acquisition of this information, just inevitably by the experience of scientific research personnel, the interference of the subjective meaning and film
The influence of quality etc., and eventually influence sentence read result.When studying historical relic, digitalized image can carry out window width
The adjusting of window position, edge enhancing, the switching of positive and negative gray scale, reverse phase, tone separation, brightness, contrast enhancing, grey scale transformation, noise reduction,
The series of preprocessing such as sharpening, contour operate, and so that image is more clear the feature of intuitive reflection implements, find naked eyes nothing
The detailed information that method is seen clearly.
A kind of historical relic material detection determination method and detection device, utilization based on Medical CT disclosed by the invention are medical
The existing advanced imaging means of CT are carrying out historical relic detection plus image processing techniques；Non-contact, accurate scanning enables us
The internal structure of three-dimension object is accurately described, so as to quantitative determine, Density Distribution carries out three-dimensional reconstruction, part is put
Greatly, Detail contrast etc..Make the historical relic of some shape, structures complexity, can arbitrarily rotate, different angle carry out comprehensively, globality
The case where each position, corner of three dimensional viewing, in detail understanding all parts；Realize three-dimensional data reconstruct and display, historical relic can
It carries out mobile space, rotation, amplification, reduce, cutting, the new three-dimensional mould after different position of fault can form sectility
Type realizes real-time 3-D view visualization；Three-dimensional measurement, the dimensional measurement of plane, space, including internal clearance, thickness,
Volume, area measurement；So that quick, the credible also more intuitive and convenient of historical relic detection；Using when can transillumination using X-ray radiography
The bigger substance of the smaller bronze ware isodensity of thickness, also can the small-sized historical relic such as transillumination porcelain, lacquer wood and painting and calligraphy.
Certainly, without deviating from the spirit and substance of the present invention, those skilled in the art should can be with
Various corresponding change and deformations are made according to the present invention, but these corresponding change and deformations should all belong to appended by the present invention
Scope of the claims.
Claims (8)
1. a kind of historical relic material based on Medical CT detects determination method, which is characterized in that include the following steps：
A carries out arameter optimization to Medical CT：By thickness, layer away from or the visual field make scanning focused to act on tested historical relic and raising
The resolution ratio of reconstruction image；
B scans water mould and carries out CT value calibration：Determine whether machine needs to be corrected；Respective CT is determined to different machines
Reference value；
C CT irradiation historical relics and water mould：
D image procossings：CT images are handled；
E results export：Bubble, hole, loss characteristics and position and the technique of historical relic are judged according to density profile.
2. a kind of historical relic material based on Medical CT according to claim 1 detects determination method, it is characterised in that：It is described
The relationship of thickness, layer described in step A away from, the visual field and resolution ratio be：
Thickness：Thickness is smaller, and resolution ratio is higher；
Layer away from：Layer is away from less than thickness；
The visual field：Scan rebuilding pixel size=display open country/matrix；The matrix.
3. a kind of historical relic material based on Medical CT according to claim 1 detects determination method, it is characterised in that：It is described
Step C is including further including：A reference value is determined according to reference value, using method of comparison, establishes the line between CT values and historical relic density
Sexual intercourse.
4. a kind of historical relic material based on Medical CT according to claim 3 detects determination method, it is characterised in that：It is described
Step D includes the following steps：
D1 image preprocessings：To enhance characteristics of image, information unrelated in image is eliminated, useful real information is restored, is increased
Detectability for information about and to the maximum extent simplified data by force, to improve feature extraction, image segmentation, matching and identification
Reliability；
D2 post processing of image：Density conversion is carried out to historical relic CT images, with mapping structure density profile, rebuilds three-D profile,
Mark density abnormal area, extraction area-of-interest etc..
5. a kind of historical relic material based on Medical CT according to claim 1 detects determination method, it is characterised in that：It is described
Step D2 is further comprising the steps of：
A calculates each pixel corresponding density value in CT figures on the basis of CT reference values；
Density value is converted to block diagram or surface chart by b, and identifies discontinuous density value wherein, i.e. hole or damage region；
C emulates historical relic threedimensional model.
D is by Density Distribution situation, the uniformity of the distribution situation of historical relic hole and material, to judge historical relic material, technique.
6. a kind of historical relic detection device based on Medical CT figure, including high-resolution CT figures, it is characterised in that：Including being used for pair
CT figures carry out microprocessor, the memory for storing historical relic material density, common small-sized historical relic manufacture craft of data processing
With the display for showing historical relic threedimensional model, historical relic material, technological process.
7. a kind of historical relic detection device based on Medical CT figure according to claim 6, it is characterised in that：The microprocessor
Device includes calculating each pixel in CT figures to correspond to the density reconstruction module of maximum density values, for identifying hole and damage region
Mark module, the three-dimensional reconstruction module for emulating historical relic threedimensional model；The density reconstruction module is connect with memory；It is described
Three-dimensional reconstruction module connects display device.
8. a kind of historical relic detection device based on Medical CT figure according to claim 6, it is characterised in that：The microprocessor
Device further includes comparison of process flow and technique determination module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810237936.4A CN108362716A (en) | 2018-03-22 | 2018-03-22 | A kind of historical relic material detection determination method and detection device based on Medical CT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810237936.4A CN108362716A (en) | 2018-03-22 | 2018-03-22 | A kind of historical relic material detection determination method and detection device based on Medical CT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108362716A true CN108362716A (en) | 2018-08-03 |
Family
ID=63001448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810237936.4A Pending CN108362716A (en) | 2018-03-22 | 2018-03-22 | A kind of historical relic material detection determination method and detection device based on Medical CT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108362716A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110969267A (en) * | 2019-12-18 | 2020-04-07 | 恒大智慧科技有限公司 | Community garbage processing method, community server and computer readable storage medium |
| CN111862340A (en) * | 2020-07-09 | 2020-10-30 | 北京市商汤科技开发有限公司 | Augmented reality data presentation method and device, display equipment and storage medium |
| CN112785552A (en) * | 2020-12-30 | 2021-05-11 | 深兰人工智能芯片研究院（江苏）有限公司 | Quality estimation method, quality estimation device, electronic device and storage medium |
| CN114018736A (en) * | 2021-11-14 | 2022-02-08 | 荆州文物保护中心 | Health condition assessment method for silk cultural relics |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281146A (en) * | 2008-05-16 | 2008-10-08 | 中国兵器工业第二一三研究所 | Method for detecting industry CT of batch product internal material density |
| CN101390753A (en) * | 2008-10-23 | 2009-03-25 | 上海交通大学附属胸科医院 | CT thin-layer ultrahigh resolution image density conversion method |
| CN102435620A (en) * | 2007-10-05 | 2012-05-02 | 清华大学 | Method and device for checking liquid articles |
| CN104297267A (en) * | 2013-07-16 | 2015-01-21 | 中国科学院寒区旱区环境与工程研究所 | Cylindrical disk for quantitatively measuring fault density of rock and soil on CT-machine scanning bed and method thereof |
| CN104316546A (en) * | 2014-10-23 | 2015-01-28 | 航天材料及工艺研究所 | Nondestructive tracking and evaluation method for quality of antenna housing made of composite material |
| CN105445291A (en) * | 2014-05-28 | 2016-03-30 | 环境保护部核与辐射安全中心 | Cultural relic disease detection method and image reconstruction method |
-
2018
- 2018-03-22 CN CN201810237936.4A patent/CN108362716A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435620A (en) * | 2007-10-05 | 2012-05-02 | 清华大学 | Method and device for checking liquid articles |
| CN101281146A (en) * | 2008-05-16 | 2008-10-08 | 中国兵器工业第二一三研究所 | Method for detecting industry CT of batch product internal material density |
| CN101390753A (en) * | 2008-10-23 | 2009-03-25 | 上海交通大学附属胸科医院 | CT thin-layer ultrahigh resolution image density conversion method |
| CN104297267A (en) * | 2013-07-16 | 2015-01-21 | 中国科学院寒区旱区环境与工程研究所 | Cylindrical disk for quantitatively measuring fault density of rock and soil on CT-machine scanning bed and method thereof |
| CN105445291A (en) * | 2014-05-28 | 2016-03-30 | 环境保护部核与辐射安全中心 | Cultural relic disease detection method and image reconstruction method |
| CN104316546A (en) * | 2014-10-23 | 2015-01-28 | 航天材料及工艺研究所 | Nondestructive tracking and evaluation method for quality of antenna housing made of composite material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110969267A (en) * | 2019-12-18 | 2020-04-07 | 恒大智慧科技有限公司 | Community garbage processing method, community server and computer readable storage medium |
| CN111862340A (en) * | 2020-07-09 | 2020-10-30 | 北京市商汤科技开发有限公司 | Augmented reality data presentation method and device, display equipment and storage medium |
| CN112785552A (en) * | 2020-12-30 | 2021-05-11 | 深兰人工智能芯片研究院（江苏）有限公司 | Quality estimation method, quality estimation device, electronic device and storage medium |
| CN114018736A (en) * | 2021-11-14 | 2022-02-08 | 荆州文物保护中心 | Health condition assessment method for silk cultural relics |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Villarraga-Gómez et al. | X-ray computed tomography: from medical imaging to dimensional metrology | |
| CN108362716A (en) | A kind of historical relic material detection determination method and detection device based on Medical CT | |
| JP5744040B2 (en) | Method for obtaining a rough 3D model and apparatus for forming a rough 3D model | |
| CA1161271A (en) | Method and apparatus for measuring mean cell volume of red blood cells | |
| CN104062308B (en) | Rock nondestructive mineral composition detection method | |
| CN109211904B (en) | Detection system and detection method for two-dimensional internal structure of asphalt mixture | |
| CN102711613A (en) | A computed tomography imaging process and system | |
| Siliqi et al. | SUNBIM: A package for X-ray imaging of nano-and biomaterials using SAXS, WAXS, GISAXS and GIWAXS techniques | |
| CN101358837A (en) | Method for determine surface structure depth of exposed aggregate concrete by curved surface fitting | |
| WO2010135901A1 (en) | Pseudo dual-energy under-sampling material discriminating system and method | |
| CN106291542B (en) | A kind of tunnel three-D imaging method | |
| HUE035719T2 (en) | New imaging modality using penetrating radiations | |
| Yang et al. | Imaging and measuring methods for coating layer thickness of TRISO-coated fuel particles with high accuracy | |
| CN109410139A (en) | Inside a kind of historical relic and surface disease digital assay appraisal procedure | |
| CN106327480A (en) | Thyroid CT image abnormal density detection method | |
| CN107300562A (en) | A kind of X-ray lossless detection method of measuring relay finished product contact spacing | |
| Anusree et al. | Characterization of sand particle morphology: state-of-the-art | |
| Lin et al. | Calibration method of center of rotation under the displaced detector scanning for industrial CT | |
| CN109870471A (en) | A kind of Cone-Beam CT angle sequence scattering acquisition methods of monochromatic light grid detecting | |
| Yan et al. | Core-CT: A MATLAB application for the quantitative analysis of sediment and coral cores from X-ray computed tomography (CT) | |
| CN115761318A (en) | Method and device for identifying texture layer and storage medium | |
| CN102519989B (en) | Method and system for recognizing pseudo-dual-energy under-sampling substance | |
| Sanctorum et al. | Dark Field Sensitivity In Single Mask Edge Illumination Lung Imaging | |
| CN114813798A (en) | CT detection device and imaging method for representing internal structure and composition of material | |
| Mendoza et al. | Statistical methods to enable practical on-site tomographic imaging of whole-core samples |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |