实现希尔伯特黄变换,主要是对信号进行视频分析，并且求信号的瞬时频率。-Achieve Hilbert Huang Transform, mainly for video signal analysis, and find the instantaneous frequency of the signal.

emd分解后希尔伯特变换，边际谱，可直接调用产生边际谱-After emd decomposition Hilbert transform marginal spectrum can be called directly produce marginal spectrum