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Dental arch line drawing method based on superpixel clustering

A technology of superpixel clustering and dental arch line, which is applied in the field of medical image processing, can solve the problems of poor drawing accuracy and low degree of automation, and achieve the effect of solving low degree of automation and high reliability

Active Publication Date: 2020-01-14
6D DENTAL TECH
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Problems solved by technology

[0005] In order to solve the problems of low automation and poor drawing accuracy of existing dental arch line drawing methods, the present invention proposes an automated and highly reliable dental arch line drawing method based on superpixel clustering

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  • Dental arch line drawing method based on superpixel clustering

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] refer to figure 1 and figure 2 , a method for drawing dental arch lines based on superpixel clustering, comprising the following steps:

[0032] Step 1: Image preprocessing, convert the oral cavity CBCT (Cone beam CT) axial image into a grayscale image M of 0 to 255, select the region of interest through the grayscale threshold (set the grayscale threshold to 120) and position information, and other The gray value of the area is set to 0;

[0033] Step 2: Define the color space CIE-G of image M and the three-dimensional vector V of pixels, where CIE-G is composed of all pixel vectors V in image M, and the vector of any pixel i in is located at coordinates (x i ,y i ), determine the initial clustering number K (assuming K=150, the corresponding image pixel is 480*480);

[0034] Step 3: Divide the graph M into K superpixel regions, and the initial area o...

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Abstract

The invention discloses a dental arch line drawing method based on superpixel clustering. The dental arch line drawing method includes: converting the oral cavity CT image into a color space CIE-G; performing superpixel clustering on the three-dimensional vector corresponding to each pixel point to obtain a clustering center set, obtaining a dental arch line pre-selection point through the gray value difference between a dental skeleton and other oral cavity tissues, then obtaining a dental arch line marking point by utilizing the position relationship of the pre-selection point, and finally fitting a dental arch line by using a cubic B spline curve. The dental arch line drawing method based on superpixel clustering is high in automation and reliability, and the problems that an existing dental arch line drawing method is low in automation degree and poor in drawing accuracy are solved.

Description

technical field [0001] The invention relates to the field of medical image processing, in particular to a method for drawing dental arch lines based on superpixel clustering for CBCT images. Background technique [0002] The rendering of dental panoramas is extremely important in the field of dental medical images, and the basis of drawing dental panoramas is to obtain dental arch lines. The dental arch line is the arc-shaped virtual line that the teeth are arranged sequentially along the alveolar bone, and its shape directly affects the establishment of dental panoramic films and 3D models of teeth. The research on the shape of the dental arch has always been the focus of scholars. At first, individual arch diagrams were drawn according to the principle of the Bonwill-Hawley formula. Later, various mathematical models were used to simulate the shape of the dental arch: mainly parabolic functions, elliptic functions, cubic spline functions, and original conic curve equation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/55G06T17/10G06K9/62
CPCG06T7/55G06T17/10G06T2207/10081G06T2207/30036G06T2210/41G06F18/23
Inventor 徐新黎庞宇超杨旭华龙海霞管秋
Owner 6D DENTAL TECH
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