中文摘要：

本文分析了已有的图像放大算法，并针对图像边缘易被模糊的问题，提出了基于图像边缘线的热传导方程放大算法，在一定程度上减少了图像边缘的模糊，取得了较好的实际效果．

英文摘要：

In this paper, we have analysized the existing algorithm of image enlargement. For the problem that the edge of the image is easily blurred,provide an amplified algorithm for the image edge-lines by the heat conduction equation. To some extent, it weakens the blurring in the edge of the image and obtains a better result.