红外与毫米波学报, 2015, 34 (2): 236, 网络出版: 2015-05-20
基于光谱空间信息的高光谱遥感图像混合噪声评估
A spectral-spatial information based approach for the mixed noise estimation from hyperspectral remote sensing images
混合噪声 噪声评估 乘性噪声 加性噪声 高光谱遥感图像 噪声模型 mixed noise noise estimation signal-dependent noise signal independent noise hyperspectral remote sensing images noise model
摘要
综合利用高光谱图像的光谱信息和空间信息, 提出了一种新的混合噪声评估方法.首先通过滤波算法进行图像中均匀图像块的自动选取; 然后利用多元线性回归模型, 将均匀图像块内像素点的信号值和噪声值进行分离, 并实现了图像中加性、乘性噪声的粗评估; 最后根据噪声模型构建似然函数, 利用最大似然估计法求解噪声模型参数.通过仿真图像和真实高光谱图像进行实验, 验证了该方法的准确性和鲁棒性.
Abstract
A novel mixed noise estimation method based on the spectral and spatial information of hyperspectral images was reported. Firstly, homogeneous image blocks were automatically detected using data masking. Then signal value and noise value of each pixel in homogeneous blocks were split with a multiple liner regression model. Meanwhile, rough approximations of SD and SI noise were obtained. Finally, likelihood function was built based on the mixed noise model, where parameters of the noise model were calculated by maximum-likelihood estimation approach. The proposed method is demonstrated to be accurate and robust by experiments with both synthetic images and real hyperspectral images.
傅鹏, 孙权森, 纪则轩. 基于光谱空间信息的高光谱遥感图像混合噪声评估[J]. 红外与毫米波学报, 2015, 34(2): 236. FU Peng, SUN Quan-Sen, JI Ze-Xuan. A spectral-spatial information based approach for the mixed noise estimation from hyperspectral remote sensing images[J]. Journal of Infrared and Millimeter Waves, 2015, 34(2): 236.