CN110101472A - A method of improving facial scan image registration denture scan image precision - Google Patents
A method of improving facial scan image registration denture scan image precision Download PDFInfo
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- CN110101472A CN110101472A CN201910320694.XA CN201910320694A CN110101472A CN 110101472 A CN110101472 A CN 110101472A CN 201910320694 A CN201910320694 A CN 201910320694A CN 110101472 A CN110101472 A CN 110101472A
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- denture
- image
- facial scan
- scan image
- patient
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0004—Computer-assisted sizing or machining of dental prostheses
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/30—Determination of transform parameters for the alignment of images, i.e. image registration
- G06T7/33—Determination of transform parameters for the alignment of images, i.e. image registration using feature-based methods
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/90—Determination of colour characteristics
Abstract
A method of improving facial scan image registration denture scan image precision, comprising the following steps: determine that facial scan equipment obtains the chromatic value range of patient's lip color；Easy chromatograph is added to patient's denture；Facial scan is carried out to patient by the facial scan equipment, obtains facial scan image；By the denture image-erasing in the facial scan, facial soft tissue image is obtained；The mouth for obtaining patient sweeps image；Mouth the denture image in image is swept with the calibration image of lip line position relationship by denture to be registrated with the face-image；The minimal difference of easy chromatograph chromatic value and patient's lip color chromaticity values is greater than the coloration accuracy of identification of the facial scan equipment in facial scan image.During carrying out facial scan, face sweep the lip image in image can not by image in mouth interference and clearly show clearly, and then light dead zone caused by facial scan equipment precision deficiency is eliminated, to ensure that the integrality of the lip cable architecture in facial scan image.
Description
Technical field
The present invention relates to denture designing technical fields, scan more particularly, to a kind of raising facial scan image registration denture
The method of the precision of images.
Background technique
Before dentures repai, doctor needs according to patient's face and oral cavity feature, the specific structure for designing denture, so that artificial tooth
It, can be with patient's face and oral cavity perfect cooperation after reparation finishes.
The step of denture designs generally comprises: the facial feature data and mouth total number evidence of patient is obtained, by facial characteristics
After denture data in data are deleted, then denture data of the mouth total number in are registrated with facial feature data, Jin Erfang
Just specific structure and the position of artificial tooth are designed.In the prior art, the face for mostly using the mode of facial scan to obtain patient greatly is special
Data are levied, during facial scan, needs patient's oral area to part a little, the positional relationship of denture Yu lip line is shown, in order to the later period
Denture design.But the oral area due to parting a little, the position connected between denture and lip line forms light dead zone, mostly facial
When scanner carries out facial scan, the complete image data of the denture between lips can not be obtained.So as shown in Figure 1,
In data processing and transmission process inside the progress of facial scan instrument, image data corresponding to light dead zone can be mended automatically
Entirely, to form fuzzy image-region, as shown in Fig. 2, after deleting the denture data deletion in facial scan image data,
Lip cable architecture in facial scan image data is destroyed, in registration process, as shown in figure 3, lip cable architecture is imperfect, it will
It will affect position and the structure design of denture.
Summary of the invention
The object of the present invention is to provide a kind of method for improving facial scan image registration denture scan image precision, the party
Method can guarantee the integrality of the lip cable architecture in facial scan image.
Foregoing invention purpose of the invention has the technical scheme that
A method of improving facial scan image registration denture scan image precision, comprising the following steps:
Step 1: determining that facial scan equipment obtains the chromatic value range of patient's lip color；
Step 2: easy chromatograph is added to patient's denture；
Step 3: facial scan being carried out to patient by the facial scan equipment, obtains facial scan image；
Step 4: by the denture image-erasing in the facial scan, obtaining face-image；
Step 5: the mouth for obtaining patient sweeps image；
Step 6: mouth being swept into the denture image in image and is registrated with the face-image, generating indicates denture and lip line position relationship
Calibration image；
The minimal difference of the chromatic value of the chromatic value and patient's lip color of easy chromatograph is greater than the face in the facial scan image
The coloration accuracy of identification of scanning device.
It is additional to patient's denture easy first when needing to carry out denture design to patient by using above-mentioned technical proposal
Chromatograph, facial 3D scanning device to patient carry out facial scan when, due to chromatograph easy in facial scan image chromatic value and
The minimal difference of the chromatic value of patient's lip color is greater than the coloration accuracy of identification of the facial scan equipment, is carrying out facial scan mistake
Cheng Zhong, lip image can not by image in lip interference and it is clear it is clearly demarcated be shown in facial scan image, and then eliminate
There is the phenomenon that light dead zone since facial scan equipment precision is insufficient, to ensure that the lip knot in facial scan image
The integrality of structure.
As an improvement of the present invention, the mode of easy chromatograph is added to the denture are as follows: smear selected color on denture surface
Coating.
As an improvement of the present invention, the mode of easy chromatograph is added to the denture are as follows: denture surface adhesion color be choosing
Determine the pad pasting of color.
As an improvement of the present invention, the mode of easy chromatograph is added to the denture are as follows: clamping color is choosing on denture surface
Determine the sheath of color.
As an improvement of the present invention, the sheath is set as the facing of package denture.
As an improvement of the present invention, the easy chromatograph is provided at least three transparent location holes.
By using above-mentioned technical proposal, when registration mouth sweeps image and face-image, denture image will not be because of by face
Portion scanning block, the setting of middle location hole can cooperate lip cable architecture, facilitate medical worker by mouth sweep image and face-image into
Row registration.
As an improvement of the present invention, the location hole is selected in central incisor mesio-incisal angle region, upper left canine tooth tooth respectively
Point and upper right canine tooth cusp.
In conclusion advantageous effects of the invention are as follows: due to the setting of easy chromatograph, during facial scan, denture
Color saturation between lip forms apparent difference, reduces facial scan and occurs the probability of fuzzy region in the process.
Detailed description of the invention
Fig. 1 is facial scan image in the prior art；
Fig. 2 is to delete the facial scan image after denture data in the prior art；
Fig. 3 is to be registrated image in the prior art；
Fig. 4 is the facial scan image in the present invention.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment one:
It referring to Fig.1, is a kind of method for improving facial scan image registration denture scan image precision disclosed by the invention, including
Following steps:
Step 1: determining that facial scan equipment obtains the chromatic value range of patient's lip color；
Step 2: easy chromatograph is added to patient's denture；
Step 3: facial scan being carried out to patient by the facial scan equipment, obtains facial scan image as shown in Figure 4；
Step 4: by the denture image-erasing in the facial scan, obtaining face-image；
Step 5: the mouth for obtaining patient sweeps image；
Step 6: mouth being swept into the denture image in image and is registrated with the face-image, generating indicates denture and lip line position relationship
Calibration image
The minimal difference of the chromatic value of the chromatic value and patient's lip color of easy chromatograph is greater than facial scan equipment in facial scan image
Coloration accuracy of identification.
In actual use, chromatic value can be mapped between 0-255, is obtained and is deposited by way of many experiments
The coloration accuracy of identification for storing up facial scan equipment, so that coloration accuracy of identification can be called directly in use process later
Numerical value.
Wherein, the method for easy chromatograph being added to denture are as follows: can be applied safely in the oral cavity that selected color is smeared on denture surface
Smear material.Such as resin and silica gel can be smeared and be solidificated in the smearable material of denture periphery, herein preferably silica gel, and
Silica gel sheath is formed after easy chromatograph solidification.
Further, mouth is swept in image and face-image registration process for convenience, denture image and face-image it
Between positional relationship, before smearing easy chromatograph, the denture part that can be scanned during facial scan in advance is chosen
Three anchor points, it is preferred that three anchor points are selected in central incisor mesio-incisal angle region, upper left canine tooth cusp and the right side respectively
Eyetooth cusp；Then it is left white in three locating point positions, such as directly digs the position of corresponding three anchor points of silica gel sheath respectively
It is empty.
It in checking procedure after registration, is verified before deleting data, proof scheme are as follows: pass through three location hole institutes
Corresponding locating point position cooperates lip cable architecture, to fast and accurately position the position of denture.
From above said content: when needing to carry out denture design to patient, adding easy color to patient's denture first
Layer, when facial 3D scanning device carries out facial scan to patient, chromatic value and trouble due to chromatograph easy in facial scan image
The minimal difference of the chromatic value of person's lip color is greater than the coloration accuracy of identification of the facial scan equipment, is carrying out facial scan process
In, lip image clearly clearly demarcated can be shown in facial scan image, and then be eliminated due to facial scan equipment precision not
There is the phenomenon that light dead zone enough, to ensure that the integrality of the lip cable architecture in facial scan image.
Embodiment two:
The present embodiment and embodiment one the difference is that: the method that easy chromatograph is added to denture are as follows: in denture surface adhesion
Color is the pad pasting of selected color.On pad pasting, cooperates the locating point position being selected in denture, be provided with location hole.Pad pasting
Preferably polytetrafluoroethylene film.
Embodiment three:
The present embodiment and embodiment one the difference is that: the method that easy chromatograph is added to denture are as follows: in denture outer surface card
The facing that color is selected color is connect, facing wraps up denture.On facing, cooperate the locating point position being selected in denture, if
It is equipped with location hole.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (7)
1. a kind of method for improving facial scan image registration denture scan image precision, which comprises the following steps:
Step 1: determining that facial scan equipment obtains the chromatic value range of patient's lip color；
Step 2: easy chromatograph is added to patient's denture；
Step 3: facial scan being carried out to patient by the facial scan equipment, obtains facial scan image；
Step 4: by the denture image-erasing in the facial scan, obtaining face-image；
Step 5: the mouth for obtaining patient sweeps image；
Step 6: mouth being swept into the denture image in image and is registrated with the face-image, generating indicates denture and lip line position relationship
Calibration image；
The minimal difference of the chromatic value of the chromatic value and patient's lip color of easy chromatograph is greater than the face in the facial scan image
The coloration accuracy of identification of scanning device.
2. a kind of method for improving facial scan image registration denture scan image precision according to claim 1, special
Sign is: the mode of easy chromatograph is added to the denture --- the coating of selected color is smeared on denture surface.
3. a kind of method for improving facial scan image registration denture scan image precision according to claim 1, special
Sign is: the mode of easy chromatograph is added to the denture --- in the pad pasting that denture surface adhesion color is selected color.
4. a kind of method for improving facial scan image registration denture scan image precision according to claim 1, special
Sign is: the mode of easy chromatograph is added to the denture --- on denture surface, clamping color is the sheath of selected color.
5. a kind of method for improving facial scan image registration denture scan image precision according to claim 4, special
Sign is: the sheath is set as the facing of package denture.
6. a kind of method for improving facial scan image registration denture scan image precision according to claim 1, special
Sign is: the easy chromatograph is provided at least three transparent location holes.
7. a kind of method for improving facial scan image registration denture scan image precision according to claim 6, special
Sign is: the position of positioning hole is selected in central incisor mesio-incisal angle region, upper left canine tooth cusp and upper right canine tooth respectively
Cusp.
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| CN201910320694.XA CN110101472B (en) | 2019-04-20 | 2019-04-20 | Method for improving accuracy of facial scan image and dentition scan image registration |
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| CN201910320694.XA CN110101472B (en) | 2019-04-20 | 2019-04-20 | Method for improving accuracy of facial scan image and dentition scan image registration |
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Cited By (2)
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| CN111768497A (en) * | 2020-06-29 | 2020-10-13 | 深圳大学 | Three-dimensional reconstruction method, device and system of head dynamic virtual model |
| CN115120372A (en) * | 2022-05-25 | 2022-09-30 | 北京大学口腔医学院 | Three-dimensional prosthesis form and position determining method |
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| CN115120372A (en) * | 2022-05-25 | 2022-09-30 | 北京大学口腔医学院 | Three-dimensional prosthesis form and position determining method |
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| CN110101472B (en) | 2021-02-12 |
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