【摘要】 从二值图像的区域特征出发,提出了基于四叉树的二值图像四边形区域压缩算法,该算法的思想是将二值图像用四叉树进行四分区域划分,在同一个区域中如果像素值相同则可用一个元素表示,否则继续划分.该算法的优点体现在如下两个方面:1.采用二进制移位的思想提高了MD码的生成效率.2.采用基于对数模型的方法进行区域像素压缩.该算法的内存开销小,运行速度高于其它相关方法.更多还原

【Abstract】 With the characteristics of zone of binary image,a quadtree quadrilateral zone producing algorithm is presented.The idea of this method is to use binary image to partition the zone into four areas with quadtree and,if the pixels in the same area have the same value then the area is presented as one element,otherwise,partition continually the area into smaller areas.The advantages of this method are as follows: At first,its binary shift can improve the efficiency of forming M_D code;secondly,the logarithm method is adopted to compress the pixel value of the area.This method combines the advantages of smaller memory consumption with higher running speed.更多还原