Resolution enhancement of images using wavelet transform extrema extrapolation
Resolution enhancement of images using wavelet transform extrema extrapolation
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DOI：
10.1109/icassp.1995.479971
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发表时间：
1995-05
期刊：
影响因子：
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通讯作者：
S. G. Chang;Z. Cvetković;M. Vetterli
中科院分区：
文献类型：
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作者：
S. G. Chang;Z. Cvetković;M. Vetterli
图像插值的一个问题是指在不损失图像清晰度的情况下放大小图像。我们提出了一种基于小波的方法，该方法估计锐化图像所需的更高分辨率信息。该方法根据跨尺度的小波变换极值的演化来推断更高分辨率的小波变换。通过识别更高分辨率信息需要遵守的三个约束，我们通过交替投影到这些约束定义的集合上来增强重建图像。
One problem of image interpolation refers to magnifying a small image without loss in image clarity. We propose a wavelet based method which estimates the higher resolution information needed to sharpen the image. This method extrapolates the wavelet transform of the higher resolution based on the evolution of the wavelet transform extrema across the scales. By identifying three constraints that the higher resolution information needs to obey, we enhance the reconstructed image through alternating projections onto the sets defined by these constraints.