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Method for converting pixel data of tooth CT image into 3D printing data

A CT image and 3D printing technology, applied in the field of image processing, can solve the problems of not providing a 3D printing data output interface and a low degree of self-adaptation, and achieve the effect of improving image conversion efficiency and precision, high degree of self-adaptation, and ensuring precision

Inactive Publication Date: 2017-09-29
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

However, the software mentioned above is suitable for processing simple general-purpose CT images. For medical images, traditional or general-purpose algorithms are not highly adaptive, and most of them do not provide a special output interface for 3D printing data. The 3D printing device can only be linked after editing and repairing

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  • Method for converting pixel data of tooth CT image into 3D printing data
  • Method for converting pixel data of tooth CT image into 3D printing data
  • Method for converting pixel data of tooth CT image into 3D printing data

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Embodiment 1

[0031] Such as Figure 1-2 As shown, a method for converting tooth CT image pixel data to 3D printing data includes the following steps:

[0032] S1: Use CT equipment to scan teeth to obtain CT images, use edge-preserving filtering algorithms to suppress noise, and analyze the blur scale and structure scale of CT images to achieve scale-adaptive contour extraction, ensuring that the algorithm is suitable for CT with inconsistent contrast and inconsistent ambiguity For the effectiveness of image processing, when extracting image pixel data, coarse positioning is first used to determine the edge pixel data and pixel-level position coordinates of the CT image to ensure the reliability of the edge. At the same time, by reducing the number of candidate points to be processed in sub-pixel positioning, To reduce the amount of calculation, for the extracted edge pixel data, through post-processing techniques such as edge enhancement, edge connection and edge refinement, the closed pix...

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Abstract

The invention relates to a method for converting pixel data of a tooth CT image into 3D printing data, and belongs to the technical field of image processing. The method comprises the steps of acquiring a CT image of a tooth, extracting pixel data of the image so as to generate pixel contour point cloud, acquiring outer surface point cloud of the tooth, performing coarse registration and fine registration on the pixel contour point cloud and the outer surface point cloud, respectively forming fine registration point cloud databases, setting a judgment value, verifying a fine registration result, combining the fine registration point cloud databases, acquiring a complete point cloud database of the tooth, rebuilding a three-dimensional grid database based on the complete point cloud database of the tooth, and forming an STL format supported by 3D printing equipment. According to the invention, a slice contour high-precision extraction method is adopted to realize adaptive extraction in order to adapt to a non-free curved surface of the tooth surface, CT scanning and non-contact scanning are combined innovatively, and existing mature algorithms are integrated, thereby realizing conversion of the pixel data of the tooth CT image into the 3D printing data, effectively improving the image conversion efficiency and precision, and being high in pertinence.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for converting dental CT image pixel data into 3D printing data. Background technique [0002] At present, many CT image processing and visualization software can complete the function of converting CT image pixel data to data interface, such as: Mimics, Geomagie, Imageware, Rapidform and surface, etc. The Reverse Engineering CAD Laboratory of Zhejiang University has carried out a lot of work in the aspect of CT restoration of 3D models, and launched the RE-SOFT software system, which solved the problem of data conversion between this software and CAD software. The application of reverse engineering in medicine at Shanghai Jiaotong University started earlier, and it has been well integrated with clinical practice. It has achieved many practical results, such as the development of Quickform software with similar functions to Mimics, and it has been ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00G06T17/20
CPCG06T17/20G06T3/08
Inventor 陈思张小丽王远李敬陈云斌刘清华李寿涛李世根石正军
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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