Foam detection method, visual recognizer and defoaming system

The invention provides a foam detection method, a visual recognizer and a defoaming system, and relates to the technical field of fermentation production.The foam detection method comprises the steps that a liquid level real-time image in a fermentation tank and a tank wall image of the fermentation tank are obtained; performing scale calibration on the height of the fermentation tank in the tank wall image to obtain a limit height value and a height scale line of the fermentation tank; the liquid level real-time image is input into a recognition model, and a pure liquid level area and a foam surface area are recognized; according to the height scale marks, the number of the pure liquid level areas and the number of the foam surface areas, the pure liquid level height value and the foam surface height value are determined, and the influence of liquid level fluctuation is eliminated; according to the pure liquid level height value, the foam surface height value and the limit height value, the determined foam a