Based On The Three-dimensional Reconstruction Of The Surface Of The Cornea In Clinical Ophthalmology

3D Reconstruction of 2D image is one of hotspots of medical image research. As a new technology, 3D Reconstruction utilizes useful messages of 2D images to show medical image tridimensionally. It improves the visibility of the image, which enables medical and scientific people to analyze or display what they need.At first, the article frames the steps that 3D Reconstruction follows. In the process, we introduce common methods which are used to realize various functions and compare the characters of them. Then we focus our effort to accomplish the 3D Reconstruction of cornea slices. The article utilizes Visual C++, digital image management, computer graphics and ophthalmological theoretical knowledges, uses the merits, characters and methods of other correlative articles for reference. It projects compact, readable and operable procedure steps to accomplish the reconstruction of the slices.The article aims at the particularities and characters of cornea slices. It bases on the positions of three dimension and utilizes the knowledges of solid geometry to get the 3D positional coordinates of 2D slices' marginal elements. The procedure adopts B-rep sculpt to divide the surface of cornea to many small parts. Each small part is simulated by small rectangle. So integrate the small rectangles to form 3D model. With a series of 3D element data, we consider them as the vertexes of small rectangles and define them according certain rule. In the same way, we define the facets. At last, we can build up the 3D Model of cornea slices. This is the main part the article emphasizes on.In the process of 3D Reconstruction, we achieve the automatic opening function of a group of images. With threshold value according with multiple-value mathematical morphological method, we pick up the marginal elements of slices accurately . The procedure accomplishes the 3D reconstructionof a group of cornea sheets successfully based on surface. In the course of the design of the procedure, we accomplish the cornea image from various points of view, considering the visibility, promptness and beauty of the display.