The extended-Octree Spheroid Subdivision and Coding Model

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The Extended-octree Spheroid Subdivision and Coding Model

Discrete Global Grid has been widely used as the basic data model of digital earth. But it is only confined to the earth surface, and it can not reach to the earth inside or outside. The extended-Octree (e-Octree) spheroid subdivision and coding model proposed here provides a new kind of global 3D grid. This e-Octree model is based on the extension of octree structure, and there are three kinds...

متن کامل

Octree Subdivision Using Coplanar Criterion for Hierarchical Point Simplification

This study presents a novel rapid and effective point simplification algorithm based on point clouds without using either normal or connectivity information. Sampled points are clustered based on shape variations by octree data structure, an inner point distribution of a cluster, to judge whether these points correlate with the coplanar characteristics. Accordingly, the relevant point from each...

متن کامل

Extended Hermite subdivision schemes

Subdivision schemes are efficient tools for building curves and surfaces. For vector subdivision schemes, it is not so straightforward to prove more than the Hölder regularity of the limit function. On the other hand, Hermite subdivision schemes produce function vectors that consist of derivatives of a certain function, so that the notion of convergence automatically includes regularity of the ...

متن کامل

The Tail Mean-Variance Model and Extended Efficient Frontier

In portfolio theory, it is well-known that the distributions of stock returns often have non-Gaussian characteristics. Therefore, we need non-symmetric distributions for modeling and accurate analysis of actuarial data. For this purpose and optimal portfolio selection, we use the Tail Mean-Variance (TMV) model, which focuses on the rare risks but high losses and usually happens in the tail of r...

متن کامل

Octree-Based Progressive Geometry Coding of Point Clouds

We propose a generic point cloud encoder that compresses geometry data including positions and normals of point samples corresponding to 3D objects with arbitrary topology. In this work, the coding process is led by an iterative octree cell subdivision of the object space. At each level of subdivision, positions of point samples are approximated by the geometry centers of all tree-front cells w...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

سال: 2013

ISSN: 2194-9034

DOI: 10.5194/isprsarchives-xl-4-w2-95-2013