Development Of Digital High Resolution Colorimeter

With the constant improvement of the importance to oral health,people,people also put forward higher requirements for caries restoration,hope caries repair fitness has higher color coordination,a higher degree of verisimilitude,high cost performance,the method of using traditional color plate can not meet the current needs,digital color meter can be rapid and accurate determination of restoration of the number of color,have important practical significance in clinical application.Digital colorimeter is one of the hot spots in the field of clinical colorimetry abroad,but it is still blank in the field of digital colorimeter in China.On the basis of literature review,to know that the shortage of the traditional colorimetric method,is developed based on digital image processing and pattern recognition technology of digital high resolution color system,the system USES optical imaging device for teeth,teeth using image processing and pattern recognition technology to color image processing,designed the image preprocessing,color space conversion,feature extraction and recognition classifier algorithm,including the color image grayscale and binarization pretreatment algorithm,Lab color space conversion algorithm,PCA principal component analysis feature extraction algorithm,KNN neighbor domain classification algorithm,Various algorithms are simulated by MATLAB simulation software to optimize algorithm parameters and reduce colorimetric error.Finally,the influence factors of the error of digital colorimeter are analyzed by means of test method.Through the development of digital colorimetry system,the effectiveness of the proposed image processing algorithm is verified,the influencing factors and rules of the colorimetry accuracy are mastered,which lays a foundation for the clinical application of digital high resolution colorimetry.