WO2017166326A1 - Procédé et dispositif de réalisation d'une comparaison de couleur de dent artificielle - Google Patents

Procédé et dispositif de réalisation d'une comparaison de couleur de dent artificielle Download PDF

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Publication number
WO2017166326A1
WO2017166326A1 PCT/CN2016/078530 CN2016078530W WO2017166326A1 WO 2017166326 A1 WO2017166326 A1 WO 2017166326A1 CN 2016078530 W CN2016078530 W CN 2016078530W WO 2017166326 A1 WO2017166326 A1 WO 2017166326A1
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Prior art keywords
color
colorimetric
denture
standard
light source
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PCT/CN2016/078530
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English (en)
Chinese (zh)
Inventor
姚科
邓良杰
陈俊延
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/04—Measuring instruments specially adapted for dentistry
    • 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
    • A61C13/08—Artificial teeth; Making same
    • A61C13/082—Cosmetic aspects, e.g. inlays; Determination of the colour

Definitions

  • the invention relates to the field of denture colorimetry, in particular to a method and a device for realizing denture colorimetric.
  • dentists can determine the color of dentures in three ways: instrument colorimetry, visual colorimetry and photo colorimetry.
  • Instrument colorimetry has been used in clinical and processing plants. Instrument color measurement can reduce the influence of subjective and objective factors on color measurement results. Compared with visual colorimetry, the results are more objective. At present, many companies have introduced a colorimeter that can be used in dental clinical measurement and analysis of body color. The measured color information can be expressed as the color tone of clinical commonly used color palettes. Different types of colorimeter (such as Spectrophotometers and colorimeters have their own advantages and disadvantages and should be selected according to clinical needs. Instrument colorimetry has the following disadvantages: 1. The instrument is expensive; 2, the probe is too large; 3, the edge is invalid; 4, the color transition cannot be recorded; 5, the stain and white freckle cannot be recorded; 6. The degree of transparency cannot be recorded; , the repeatability is poor; 8, the output is the color palette color, so that the craftsman to make and evaluate the color of the teeth depends on the color palette.
  • the visual colorimetric process is generally divided into the following sections: 1 Light waves (scattering, reflecting, transmitting, etc.) that are not absorbed by the teeth enter the human eye and are accepted by the photoreceptor cells. 2. Light is felt by photoreceptor cells (cones or rods), transmitted to the brain and perceived as a specific color. 3. The physician compares the perceived color with the color scale on the standard color palette, selects the closest color label and records it, and the technician makes the denture based on the doctor's record.
  • Visual colorimetry has the following disadvantages: 1 At present, most of the clinical colorimetric uses diffuse daylight or artificial light source for colorimetry. The light intensity, color temperature and color rendering index of the light source are unstable, and the same light source cannot be obtained at the same time in the clinic and the factory, and the repeatability is also poor. 2 On different standard colorimetric plates, the color code has a color difference, which brings uncertainty to the final color determination. 3, white spots on the teeth, color spots such as fluorine spots and color transitions and transparency are difficult to record.
  • the clinical use of a digital camera to take pictures of the teeth sends the picture results to the technician's computer, and the technician determines the color through the image.
  • the main advantages of this method are: 1. Throughout the patient - doctor - Color communication between technicians does not require a standard color palette, eliminating the problem of too little color palette and unstable color code. 2 Color communication through photos can provide an intuitive reflection of color transitions, stains, and transparency.
  • the shortcomings of the following are as follows: 1.
  • the camera's built-in white balance and image algorithm greatly affect the color accuracy. 2
  • the photo environment light source is unstable or the flash color temperature is unstable, which affects the color accuracy; 3.
  • the technician's computer monitor color display is inaccurate and affects the result; 4 When the technician makes a denture, the light source does not affect the color matching.
  • the technical problem to be solved by the present invention is to provide an energy solution to the above-mentioned drawbacks of the prior art.
  • the technical solution adopted by the present invention to solve the technical problem is: constructing a denture colorimetric implementation method, comprising the following steps:
  • the camera transmits the captured picture to a computer of the denture production center via a network, and the computer transmits the picture to a color-corrected monitor for display;
  • the standard colorimetric light source has a color temperature of 5500 k ⁇ 50 and a color rendering index of 97.2.
  • the light intensity is 250lm ⁇ 20.
  • the color correction process when color correction is performed on the monitor, the color correction process includes the following steps:
  • C2 performing color index measurement on the standard color block using a spectrometer;
  • the color indicator includes hue, brightness, and saturation;
  • C3 Perform color cast correction on the monitor using the color measurement correction software installed on the computer according to the measured color index.
  • the signal generator software is VirtualForge.
  • the color measurement correction software is Calman Studio.
  • the invention also relates to an apparatus for implementing the above-described denture colorimetric method, comprising:
  • Environmental parameter normalization unit used to standardize colorimetric environmental parameters using standard colorimetric light sources
  • Photo unit used to adjust the camera's photo output format to raw a format for photographing a tooth under the standard colorimetric light source using the camera;
  • Picture transfer display unit for causing the camera to transmit the captured picture to a computer of the denture production center through a network, the computer transmitting the picture to a color-corrected monitor for display;
  • Denture color making unit used to enable a technician to imitate the picture under the standard colorimetric light source to make a denture color.
  • the standard colorimetric light source has a color temperature of 5500 k ⁇ 50 and a color rendering index of 97.2, and the light intensity is 250lm ⁇ 20 .
  • the apparatus when performing color correction on the monitor, the apparatus further includes:
  • Color block projection unit for projecting standard color patches onto a monitor conforming to the color industry standard using signal generator software installed on the computer;
  • a color indicator measuring unit configured to perform color indicator measurement on the standard color block using a spectrometer; the color indicator includes hue, brightness and saturation;
  • a color cast correction unit is configured to perform color cast correction on the monitor according to the measured color index using color measurement correction software installed on the computer.
  • the signal generator software is VirtualForge.
  • the color measurement correction software is Calman Studio.
  • the method and device for realizing the denture colorimetric of the present invention have the following beneficial effects: since the colorimetric environment used is a standardized colorimetric environment, the success rate of the colorimetric can be increased, and the color ratio of the standardized light source relative to the instrument can be standardized.
  • Cheap the picture taken by the camera is Raw Format output, which removes the effects of white balance and compression algorithms on the image, which increases the accuracy of the recognition.
  • the color-corrected monitor is used to display the image, which increases the accuracy of the color. can Improve the success rate of denture production, greatly reduce the rework rate, improve colorimetric and production efficiency, and save costs.
  • FIG. 1 is a flow chart of a method for implementing denture colorimetric method and apparatus according to an embodiment of the present invention
  • Figure 3 is a schematic view showing the structure of the apparatus in the embodiment.
  • FIG. 1 a flowchart of the method for realizing the denture colorimetric is shown in FIG. 1 .
  • the implementation method of the denture colorimetric includes the following steps:
  • Step S01 The colorimetric environmental parameters are normalized using a standard colorimetric source: in this step, the colorimetric ambient parameters are normalized using a standard colorimetric source, which has a color temperature of 5500k ⁇ 50 and a color rendering index of 97.2, the light intensity is 250lm ⁇ 20 . That is, the parameters of the light source are standardized.
  • the normalized colorimetric source is used for each colorimetric, or colorimetric at different times and locations, which is equivalent to a standard colorimetric environmental parameter.
  • the color temperature of 5500K is equivalent to the sun color temperature of 10 o'clock in the morning and 4 o'clock in the afternoon, in line with CIE D55. Standard colorimetric source standard.
  • the color temperature setting that conforms to the law of human activity increases the metamerism matching between the artificial tooth and the natural tooth, which greatly reduces the patient's return visit.
  • Color rendering index >97Ra much higher than CIE Standard color rendering index >90Ra
  • the requirements are more complete and very close to the sun. Simulating the sun all day (including evening), showing more color details of natural teeth, for a high-demand complex color case, can achieve a colorimetric completion, very efficient.
  • Step S02 adjust the camera's photo output format to raw Format, use the camera to take pictures of the teeth under a standard colorimetric light source:
  • the output format of the photos in the camera menu is adjusted to raw format, then use raw
  • the format camera takes pictures of the teeth under a standard colorimetric light source, which automatically removes the effects of white balance and compression algorithms on the image and improves color accuracy.
  • Step S03 The camera transmits the captured picture to the computer of the denture production center through the network, and the computer transmits the picture to the color-corrected monitor for display: in this embodiment, the computer of the denture production center is connected with the color-corrected monitor. In this step, the camera transmits the captured picture to the computer of the denture production center through the network, and then the computer transmits the picture to the color-corrected monitor for display, which can reduce the influence on the color accuracy. In addition, various factors such as transparency, color spots, chalk, and color gradation can be completely recorded by the image displayed on the monitor.
  • Step S04 The technician simulates the image under the standard colorimetric light source to make the denture color: In this step, the technician simulates the image under the standard colorimetric light source to make the denture color.
  • colorimetric and denture preparation can be standardized by a colorimetric light source, which can reduce human error and accurately reproduce color, and it is not necessary to use a color palette, and the present invention is different from the conventional colorimetric color.
  • the instrument is inexpensive.
  • the denture colorimetric realization method of the invention can improve the success rate of the denture production, greatly reduce the rework rate, improve the colorimetric and production efficiency, and save the cost.
  • Step S31 The standard color block is projected on the monitor conforming to the color industry standard by using the signal generator software installed on the computer: in this embodiment, the signal generator software is installed on the computer of the denture production center, and in this step, the first acquisition is met.
  • Color industry standard monitors then use the signal generator software installed on the computer to project standard color patches onto monitors that meet industry standards for color.
  • signal generator software There are many types of signal generator software. In actual use, you can select a signal generator software according to your specific needs, for example: VirtualForge. It is worth mentioning that the parameters of the standard color blocks of different signal generator software are also different.
  • Step S32 The color index measurement is performed on the standard color block by the spectrometer: in this step, the color indicator is measured by the spectrometer.
  • Different color systems have different parameters. The more common parameters are hue, lightness and saturation. These three parameters are called three elements of color. In this embodiment, the color index uses hue, lightness, and saturation.
  • Step S33 Color correction is performed on the monitor based on the measured color metrics using the color measurement correction software installed on the computer:
  • the color measurement correction software is installed on the computer of the denture production center to facilitate regular calibration of the monitor.
  • the color correction of the monitor is performed using the color measurement correction software installed on the computer according to the measured color index. This completes the color correction of the monitor, thereby reducing the effect of color accuracy due to inaccurate monitor color rendering.
  • Photo unit 2 Used to adjust the camera's photo output format to raw format, using the camera to take pictures of the teeth under a standard colorimetric light source; Picture Transfer Display Unit 3 It is used to cause the camera to transmit the captured picture to the computer of the denture production center through the network, and the computer transmits the picture to the color-corrected monitor for display; the denture color making unit 4 It is used to enable the technician to imitate the picture under the standard colorimetric light source to make the denture color.
  • colorimetric and denture fabrication can be standardized for colorimetric light sources, which reduces human error, accurate color reproduction, and does not require the use of colorimetric plates.
  • the present invention is relatively inexpensive compared to conventional colorimeters.
  • the device of the invention can improve the success rate of the denture production, greatly reduce the rework rate, improve the colorimetric and production efficiency, and save the cost.
  • the apparatus when performing color correction on the monitor, the apparatus further includes a patch projection unit 5, a color index measuring unit 6, and a color cast correction unit. 7; wherein, the patch projection unit 5 It is used to use the signal generator software installed on the computer to project standard color blocks on the monitors that meet the color industry standards. There are many types of signal generator software. In actual use, you can select a signal generator software according to your specific needs. ,E.g: VirtualForge.
  • Color indicator measuring unit 6 It is used to measure the color index of standard color blocks by using the spectrometer; the color indicators include hue, brightness and saturation; there are many color measurement correction software. In practical applications, the corresponding color measurement correction software can be selected according to specific needs, for example: Calman Studio.
  • Color cast correction unit 7 Used to perform color cast correction on the monitor based on the measured color metrics using the color measurement correction software installed on the computer. This reduces the impact of color inaccuracy on the color accuracy of the monitor.
  • the present invention is relatively inexpensive compared to the conventional colorimeter; the color reproduction is relatively accurate; the factors such as transparency, color spots, chalk, and color gradation can be completely recorded, and the color and denture can be made into a light source. Standardization can reduce human error; you don't have to use a color palette. It can improve the success rate of denture production, greatly reduce the rework rate, improve colorimetric and production efficiency, and save costs.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Dentistry (AREA)
  • Animal Behavior & Ethology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

La présente invention décrit un procédé et un dispositif de réalisation d'une comparaison de couleur d'une dent artificielle, comprenant les étapes suivantes : standardisation des paramètres d'environnement de comparaison de couleur en utilisant une source de lumière de comparaison de couleur standard ; réglage d'un format de sortie d'une photographie prise par une caméra à un format brut, et utilisation de la caméra pour photographier une dent sous la source de lumière de comparaison de couleur standard ; la caméra envoyant les photographies obtenues à un ordinateur d'un centre de production de dent artificielle à travers un réseau, et l'ordinateur envoyant les photographies à un écran à couleur corrigée pour l'affichage ; et un technicien produisant une couleur d'une dent artificielle en imitant les photographies sous la source de lumière de comparaison de couleur standard. Le procédé et le dispositif de réalisation d'une comparaison de couleur présentent les effets avantageux suivants : augmentation du niveau de succès de la production de dent artificielle, réduction de manière significative du niveau de reprise du travail, accroissement de l'efficacité de la comparaison et de la production de couleur et économie de coûts.
PCT/CN2016/078530 2016-03-31 2016-04-06 Procédé et dispositif de réalisation d'une comparaison de couleur de dent artificielle Ceased WO2017166326A1 (fr)

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CN201610203620.4A CN105662624A (zh) 2016-03-31 2016-03-31 一种义齿比色的实现方法及装置
CN201610203620.4 2016-03-31

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Cited By (2)

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WO2020201623A1 (fr) 2019-03-29 2020-10-08 Lumi Dental Oy Détermination de teinte de dent en fonction d'une image obtenue à l'aide d'un dispositif mobile
US12527652B2 (en) * 2020-06-22 2026-01-20 Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University) Artificial tooth manufacturing information generation method and artificial tooth manufacturing system

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CN109394376B (zh) * 2018-09-30 2020-12-29 重庆登康口腔护理用品股份有限公司 一种牙齿着色风险评估方法
CN109350277B (zh) * 2018-10-08 2021-07-02 杭州而然科技有限公司 一种数字化精确制作牙科修复体的方法
CN115120379B (zh) * 2022-06-30 2025-01-14 爱迪特（秦皇岛）科技股份有限公司 一种氧化锆贴面的比色方法
TWI865339B (zh) * 2024-02-16 2024-12-01 亞東學校財團法人亞東科技大學 牙齒比色校正盒及其應用方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020201623A1 (fr) 2019-03-29 2020-10-08 Lumi Dental Oy Détermination de teinte de dent en fonction d'une image obtenue à l'aide d'un dispositif mobile
US12527652B2 (en) * 2020-06-22 2026-01-20 Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University) Artificial tooth manufacturing information generation method and artificial tooth manufacturing system

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