Method for re-establishing surface of three dimensional target object by unparallel dislocation image sequence

Abstract

The invention provides a method for re-establishing a surface of a three dimensional target object by an unparallel dislocation image sequence, and belongs to the technical field of re-establishment and visualization of a three dimensional image. The method comprises that: the outline of the target object is extracted by cutting the dislocation image; the outline of the target object is subjectedto distance conversion, extraction of disc aggregate and removal of redundancy so as to find out a maximum disc aggregate in the outline of the target object; and the disc aggregate is selected out from adjacent dislocation images for interpolation, a vector value of each point, which points to the target object in the image, in the dislocation image is calculated; a distance value of space points between the dislocation images needed for interpolation is determined; and the outline based surface is drawn and displayed. The method realizes the direct re-establishment of the surface of the three dimensional target object by the unparallel dislocation image sequence with high re-establishment accuracy and speed, and can also achieve quite good effect on the surface re-establishment of a three dimensional target object with a complex geometric shape.

Description

(1) Technical field [0001] The invention relates to a method for image reconstruction and visualization, in particular to a method for reconstructing the surface of a three-dimensional target object from a sequence of non-parallel tomographic images. (2) Background technology [0002] In some applications in the field of 3D image reconstruction and visualization technology, people obtain a series of non-parallel tomographic image sequences of 3D target objects through data acquisition, and one of the most common ways to observe 3D target objects is surface display, which is It is required that we must be able to reconstruct the surface of a three-dimensional target object from a sequence of non-parallel tomographic images. Here, contour-based surface reconstruction is the most widely used method. In the previous contour-based surface reconstruction methods, the non-parallel tomographic image sequence was usually reorganized and rearranged first to obtain a regular volume da...

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Problems solved by technology

[0004] Aiming at the shortcomings of the reconstruction method described in the background technology, such as long time consumption, low precision, poor practicability, and difficulty in adapting to the three-dimensional target object with complex geometric shape, the present invention proposes a method for directly reconstructing the surface of the three-dimensional target object from the original non-parallel tomographic image sequence , it directly obtains the contour of the 3D target object by segmenting part of the original tomographic image, and then interpolates to obtain all the contours required for contour-based surface rendering and display

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