摘要
图像放大问题的焦点是如何在图像放大过程中保持良好的视觉分辨率和清晰度。论文首先对加权抛物线插值算法进行了改进,在此基础上提出一种加权抛物线插值结合小波变换的图像放大算法,并对小波变换后的小波系数低频带作了幅值增强处理。实验结果表明,相对于传统的图像放大算法,该算法不仅较好地保留了原始图像的细节信息,而且还提高了放大后图像的亮度和清晰度。
The key issue of image magnification to keep good visual resolution and definition.In this paper,the weighted parabolic interpolation algorithm is firstly improved,and then a new algorithm to magnify images is proposed,which combine the improved weighted parabolic interpolation algorithm and discrete wavelet transformation to realize the image magnification.In the mean time,the amplitude of low-frequency field of wavelet transformation is enhanced.The results of experiments show that,com- pared with traditional methods,this new algorithm not only keeps the details of the original image,but also enhances the brightness and definition of the amplified images.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第1期48-50,共3页
Computer Engineering and Applications
基金
国家自然科学基金(the National Natural Science Foundation of China under Grant No.60503003
60673066)。
关键词
图像放大
小波变换
加权抛物线插值
image magnification
wavelet transformation
weighted parabolic interpolation
