该文根据Hilbert-Huang变换的原理,给出了二维内蕴模式函数分量的递推形式,实现了二维Hilbert—Huang变换的分解方法,并在图像分解应用中取得了满意的效果,从而拓展了Hilbert—Huang变换的应用范围。通过把原始图像自适应分解成有限数量的子图像,图像的细节能清晰地被分解出来,这在数字图像处理中有很重要的意义。
In this paper, the mathematic expressions of Intrinsic Mode Functions (IMFs) of the 2-dimension Local Wave Analysis (LWA) are put forward, and the 2-dimension decomposition method of HHT is developed. The clear image details have been extracted by using the method to adaptively decompose a digital image into a finite number of sub-images. That is very important for digital image processing.