二维EMD的纹理分析及图像瞬时频率估计

Bidimensional EMD for Texture Analysis and Estimation of the Instantaneous Frequencies of an Image

将一维经验模式分解(EMD)方法和Hilbert-Huang变换(HHT)直接应用于二维图像处理中,提出了一种新的二维EMD算法,将提取出图像的多尺度空间频率信息分别用HHT和直接法来估计多分量图像AM-FM形式的瞬时频率.最后用文中算法分别对合成图像和自然图像进行了实验.

A new algorithm based on bi-dimensional empirical mode decomposition （BEMD） is developed to extract features of texture at multiple-scale spatial frequencies. Hilbert-Huang transform （HHT） and direct method are applied to estimate the instantaneous frequencies of the multi-component AM-FM image respectively. All algorithms are demonstrated in the experiment with either synthetic or natural images.