Object detection and object cutting algorithm based on time sequence and frequency domain filtering

The invention discloses an object detection and object cutting algorithm based on time sequence and frequency domain filtering, and the algorithm comprises the following steps: S1, inputting a video, and extracting a key frame; s2, intercepting low-frequency information in a frequency domain, and calculating a real-time background image and an adaptive threshold in a time sequence according to a formula; s3, after low-frequency information is intercepted from an input current frame, obtaining a foreground image by taking the real-time background image calculated in the S2 and the adaptive threshold value as standards, carrying out foreground and background discrimination on the current frame, cutting a target object in the current frame image through an object cutting algorithm, tracking the foreground object, and removing wrong objects; and taking the next frame as a new current frame, and performing background state calculation and object detection again. According to the real-time background updating metho