| 基于扩散率函数的图像放大算法 |
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| 引用本文： | 许微 侯正信. 基于扩散率函数的图像放大算法[J]. 传感技术学报, 2006, 19(4): 1257-1260 |
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| 作者姓名： | 许微 侯正信 |
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| 作者单位： | 天津大学电子信息工程学院,天津,300072 |
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| 摘 要： | 利用扩散率函数的特性,提出一种实现数字图像放大的新方法.该方法对原图像进行内插,采用距离函数和梯度函数作为权值对插入的像素赋值.算法简单、易于实现,且运算所需时间短.利用Matlab 6.5进行仿真,结果显示无论是整数倍放大还是分数倍放大,该算法均能得到比较理想的效果,放大后的图像清晰,且保留了原图像的边缘信息.
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| 关 键 词： | 扩散率函数 图像内插 图像放大 整数倍放大 分数倍放大 |
| 文章编号： | 1004-1699（2006）04-1257-04 |
| 收稿时间： | 2005-10-06 |
| 修稿时间： | 2005-10-06 |
Algorithm for Image Enlargement Based on Diffusivity Function |
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| Xu Wei,Hou Zhengxin. Algorithm for Image Enlargement Based on Diffusivity Function[J]. Journal of Transduction Technology, 2006, 19(4): 1257-1260 |
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| Authors: | Xu Wei Hou Zhengxin |
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| Affiliation: | School of Electronic and Information Engineering, Tianjin University, Tianj in 300072, China |
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| Abstract: | Based upon the property of diffusivity function, a new method to enlarge a digital image is proposed. After interpolating the original image, this algorithm evaluates the values of the interpolative pixels with the distance function and the gradient function as the weight. The algorithm is simple and suited for implementation, and the time for calculation is short. Simulated by Matlab 6. 5, the new algorithm performs better than known algorithms at both integer and fractional zooming ratios. The zoomed image is more clear with the important edges remained. |
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| Keywords: | diffusivity function image interpolation image enlargement integer zooming ratio fractional zooming ratio |
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