What is the principle of anti-shake pan/tilt?

The principle is that when the pan-tilt moves forward, the pan-tilt bracket moves backward, and the position of the instrument fixed on the pan-tilt remains unchanged. Left-right movement is the same principle. In fact, this is also a kind of bionics. Many birds can keep the orientation of their heads unchanged by neck movements. The digital image processing of iCatch chip has the characteristics of high performance and low power consumption.