Imaging automatic gain compensation method and system, storage medium and ultrasonic endoscope

The invention provides an imaging automatic gain compensation method and system, a storage medium and an ultrasonic endoscope, and the method comprises the following steps: obtaining a current frame image by applying a current TGC curve; setting attenuation coefficients of the probe in water and human tissues; positioning a depth area containing a tissue image according to a current frame image, obtaining a depth range interval containing a tissue part in a far field section and a depth range interval of a water coupling section in a near field section through a signal and image processing mode, and respectively performing corresponding gain compensation; obtaining a corresponding full-depth attenuation curve according to different attenuation in depth range intervals of the water coupling section and the tissue part section, and updating a corresponding TGC curve; and applying the TGC curve of the previous frame when the next frame is processed, and repeating the steps. By adopting the technical scheme of th