小波双线性插值搜索算法及其在光学遥感图像中的应用

详细分析了在小波双线性插值中高频外推阈值门限与峰值信噪比的变化关系,提出了基于峰值信噪比最大的小波双线性插值搜索算法。提出的算法能够自动搜索到峰值信噪比最大的高频外推最佳阈值门限,实现了在不破坏光学遥感图像原始信息的情况下,提高了图像的空间分辨率,有利于对图像的细节信息进行观察分析。实验结果表明:该算法能够得到比双线性插值和全小波插值更高的峰值信噪比、熵值和更好的图像细节效果,是一种适合提高光学遥感图像分辨率的有效算法。

Wavelet bi-linear interpolation search algorithm on the maximum of PSNR and application in improving the space resolution of the optical remote sensing image

The variable relationship between the threshold of the high frequency extrapolation in the wavelet bi-linear interpolation algorithm and its correspondent peak of the signal-to-noise ratio (PSNR) is analyzed in detail. The wavelet bi-linear interpolation search algorithm on the PSNR maximum is proposed. This algorithm can automatically search the optimal extrapolation threshold to improving the resolution of the remote sensing image without damaging the original image information, which make the detail information of the processed image favorable to observe and analyze. The experiment results show that the algorithm can get better PSNR and image detail information than the bi-linear interpolation and the wavelet scale-function interpolation. It is an effect algorithm to improve the space resolution and entropy of the Optical Remote Sensing Image.