Curved planar reconstruction method for cardiac scattered-point cloud data

A technology of surface reconstruction and scattered points, applied in the field of surface reconstruction, can solve problems such as inability to find accurate surfaces, data redundancy, noise, etc.

Inactive Publication Date: 2013-03-27
SHANGHAI HANPAN INFORMATION TECH
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Problems solved by technology

Due to the large enough sampling density, the collected data is redundant and noisy, so it is impossible to find an accurate surface that passes through the sampling points. For scat

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  • Curved planar reconstruction method for cardiac scattered-point cloud data
  • Curved planar reconstruction method for cardiac scattered-point cloud data
  • Curved planar reconstruction method for cardiac scattered-point cloud data

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Embodiment 1

[0049] Such as figure 1 As shown, a method for surface reconstruction of heart scattered point cloud data, reconstructing a three-dimensional heart surface model from the heart scattered point cloud data collected by a catheter that contains noise and a large number of outliers and is not uniformly sampled, includes the following steps:

[0050] Step 1. Define the data representation form of the collected point cloud data, establish the octree topological relationship, and define the spatial function, so as to not only improve the search speed of points, but also accelerate the solution process of the spatial function;

[0051] In this step, the octree topology relationship is established and the spatial function is defined. The specific steps are as follows:

[0052] 1) Establish an octree topological relationship for the heart scattered point cloud data collected by the catheter, read in all point cloud data, record the maximum and minimum coordinates of points in the three ...

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Abstract

The invention relates to the field of curved planar reconstruction, in particular to a curved planar reconstruction method for cardiac scattered-point cloud data. The curved planar reconstruction method for cardiac scattered-point cloud data includes the steps of firstly, defining the data representation form of acquired point cloud data, establishing octree topological relation, and defining a space function; secondly, establishing a vector field, selecting local adjacent planes, and determining vertex normal vectors according to an average of planar normal vectors of the local adjacent planes; thirdly, uniformizing the vertex normal vectors; and fourthly, solving a Poisson equation, extracting a contour surface by MC (marching cubes) algorithm according to an indicator function and gradient thereof, and reconstructing a cardiac three-dimensional surface model. By the curved planar reconstruction method for cardiac scattered-point cloud data, cardiac spatial position relation can be displayed visually and accurately, optional display, zooming, rotation and cutting in three dimensions can be achieved, cardiac diseases can be detected, computer diagnostic analysis for diseases such as arrhythmia and surgical accurate simulation are achieved, and safety and reliability in disease diagnosis are improved.

Description

technical field [0001] The invention relates to the field of curved surface reconstruction, in particular to a heart curved surface reconstruction method. Background technique [0002] Surface reconstruction is the process of quickly, accurately and efficiently obtaining complex 3D surface models from 3D data collected from objects or samples, and is currently widely used in reverse engineering. The so-called reverse engineering is to use electronic instruments to collect raw data from objects or samples, and then use computer equipment to convert the data into conceptual models, and on this basis to analyze, modify and optimize products and other related information. A relatively independent category in / CAM. At present, surface reconstruction technology has been widely used in many fields, such as manufacturing, animation games, mold design, medical simulation and archaeology. [0003] Since the three-dimensional data collected by measuring equipment is usually relativel...

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Application Information

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IPC IPC(8): G06T17/00
Inventor 马秀丽李慧万旺根贾洋洋王智周学礼
Owner SHANGHAI HANPAN INFORMATION TECH
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