基于点的方向图算法

提出了一种基于曲率的点方向初始值算法．该算法根据像素点在不同方向上的曲率变化确定该点的初始方向值，并明确提出了点方向的概念．提出了一种点方向图的新算法并研究了相应的快速算法．基于块划分的传统块方向图有时是不连续的．与块方向图相比，点方向图保留了块方向图的统计特性，又克服了块方向图的缺陷，不需要先进行背景分离，点方向计算与背景分离同步进行．

An Algorithm for the Point Directional Image

Based on the curvature, an algorithm for the initial value of a pixel point was proposed. The initial value of the point directional image can be quickly determined according to the curvature varieties along different directions, and its notion was definitely proposed. A novel algorithm for the point directional image was proposed, and its corresponding fast algorithm was stuided. Compared with the traditional block directional images based on block zones, which were not continuous sometimes, the point directional image can retain the statistical characteristics of the block directional image, but can overcome the defects of the block directional image and avoid the breakaway from the ground. Therefore, the calculation of the point directional image and the breakaway from the ground can process synchronously.