quadric surface 中文意思是什麼
quadric surface
解釋
二次曲面-
We call this surface the stress quadric.
我們稱這個曲面為應力二次曲面。 -
Reconstruction of quadric surface solids from engineering drawings
基於工程圖的二次曲面體重建 -
Parameters extraction of quadric surface based on real - coded genetic algorithm
基於實數編碼遺傳演算法的二次曲面提取 -
Identifying and parameters extraction of quadric surface based on discrete point
基於離散點的二次曲面識別及參數提取 -
Using the normal and neighbor relationship, classification of scattered data points is realized according to the quadric surface. the typical algorithms of surface reconstruction from 3d scattered data points are introduced, and then we discuss the current surface tessellation algorithms about their adaptive range, low efficiency
本文首先對三維散亂數據點重構曲面的典型演算法和現有的曲面網格劃分演算法進行了分類與比較，針對現有的散亂點曲面重建演算法存在的低效率和局限性問題提出了相應的解決方案。 -
Using local base surface parameterization, a parametric quadric surface approximation method is used to estimate the local surface curvature properties of scattered points based on propagating normal vector direction
首先，計算各點的鄰近點集，選取合適的局部基礎曲面，把鄰近點集投影到相應的局部基礎曲面。 -
When the machining tools is perfected, it can process all of quadric curves and high degree curves with high surface form precision. at the same time, the its structure is very simple processing size range is large and its efficiency is high, so it will greatly reduce the cost of processing of aspheric parts
該機床完善後，可加工所有二次曲線和高次曲線，並能保證較好的零件面形精度，該機床結構簡單，加工尺寸范圍大，加工效率高，將會大大降低非球面加工的成本。 -
Central quadric surface
有心二次面 -
A new method is offered to extract quadric surface based measured points for reverse engineering
為逆向工程中基於測量點的二次曲面提取提供了一種新的方法。 -
Extracting quadric surface from measured data is an important problem in reverse engineering of mechanical parts
摘要在機械產品的逆向工程中，針對測量數據提取常用二次曲面是非常重要的。 -
This paper proposes for the first time to use genetic algorithm based on real - number - coding to extract quadric surface
首次提出利用基於實數編碼的遺傳演算法針對離散數據點進行二次曲面提取。 -
Abstract an algorithm of feature surface recognition based on quadric surface fitting and geometry property was presented
摘要提出了基於二次曲面擬合誤差分析和幾何屬性分析的特徵曲面識別演算法。 -
This dissertation proposes an algorithm to detect edges and extract contours from medical images based on quadric spline wavelets transform. the algorithm can generate single, continuous and close contours. there are two main methods of surface reconstruction ? explicit connecting contours method and implicit function method
利用小波變換良好的局部化特性和其固有的多尺度特性，具體針對醫學圖象邊緣輪廓提取的特點，提出一種基於二次樣條小波變換的邊緣檢測和輪廓提取方法，提取出單像素和連續封閉的邊緣輪廓。 -
Algorithms of curvature estimation and data simplification of scattered point cloud data are studied. local surface curvature properties on scattered - point data are estimated using a parametric quadric surface approximation, and the key step is local base surface parameteration method which resolves parameteration of scattered - point data. an algorithm is presented for simplifying the scattered point cloud data based on curvature restriction
實例表明，本文演算法的簡化結果既較好地保留了形狀特徵，同時使點的分佈以點雲密集的強制保留區為中心，在向附近擴散的過程中逐漸變稀，避免簡化后點雲的局部過密或局部過稀的情況。
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