Patent ID: 11961299
Assignee: ALIBABA GROUP HOLDING LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. An apparatus comprising:
one or more processors;
memory storing executable instructions that, when executed by the one or more processors, cause the one or more processors to perform acts comprising:
performing shot boundary detection on content of a video, wherein performing the shot boundary detection on the content of the video comprises:
calculating a normalized histogram of each image frame;
calculating a normalized cumulative histogram of each image frame; and
calculating a difference between cumulative histograms of every two adjacent image frames to form a difference sequence;
smoothing the difference sequence using a window of a preset size;
calculating a standard deviation of the difference sequence within a time window whose time length is a preset length;

determining a time duration of each shot according to positional points of a shot boundary, and composing the time duration of each shot into a shot boundary time slice sequence; and
obtaining video fingerprint information according to the time slice sequence.