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Matlab6.5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。
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.
出处
《传感技术学报》
CAS
CSCD
北大核心
2006年第4期1257-1260,共4页
Chinese Journal of Sensors and Actuators
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
diffusivity function
image interpolation
image enlargement
integer zooming ratio
fractional zooming ratio
