The main purpose of anti-shake is to avoid the influence of external factors such as hand shake on image quality to the greatest extent. Among them, optical anti-shake can be divided into lens moving optical anti-shake and photosensitive element moving optical anti-shake, and electronic anti-shake can be divided into ISO anti-shake (so-called "natural anti-shake" realized by improving camera sensitivity) and digital anti-shake (realized by pixel compensation and other calculation methods). This technology can help to improve or compensate the problem of blurred image quality caused by accidental jitter of equipment during video shooting.
In the patent map provided, Apple describes the process of this video shooting stabilization technology (pictured above). Apple provides an implementation method to obtain a stable video sequence. The method includes the device acquiring a video sequence with a plurality of consecutive images and associated motion sensor data, which can estimate the accidental shake of the camera device, and then erasing these estimated images from the video sequence, and the modified imaging sequence will be (compressed) stored in the memory.