Ultrasonic Nakagami hybrid model parameter estimation and imaging method based on cumulative distribution function

The invention discloses an ultrasonic Nakagami hybrid model parameter estimation and imaging method based on a cumulative distribution function. According to the method, an envelope signal is calculated through an ultrasonic radio frequency signal, the cumulative distribution function is calculated, ultrasonic Nakagami hybrid model parameters are automatically estimated, and parameter imaging is carried out. Performing Hilbert transform on the ultrasonic radio-frequency signal to obtain an envelope signal, sliding on the envelope signal by utilizing a rectangular window, calculating a cumulative distribution function measurement value in the window, adaptively setting a search initial value of a Nakagami hybrid model parameter, and performing Hilbert transform by taking the search initial value as an initial value; and searching a Nakagami hybrid model parameter corresponding to a cumulative distribution function theoretical value with the minimum KL distance from the cumulative distribution function measurem