二值点阵图像的放大与缩小方法研究

On Enlarging and Lessening a Binary Digital Inage

着重研究了二值点阵图像的放大、缩小方法，针对二值点阵灰度图和工程图现有的缩小和放大算法及存在的问题，提出了基于区域特征的图像变换思想，以图块为单位进行图像的放大、缩小．据此，提出了对二值灰度图和工程图进行放大、缩小的改进算法并进行分析。

This paper is concerned with the digital image enlarging and lessening. On the basis ofthe analysis on the existing enlarging and lessening algorithms used in binary matrix grayscale irnages and in engineering drawings,the image transformation idea based on region fea-tures is proposed.The images are enlarged or lessened by segments rather than by pixels. New algorithms are given and discussed.