Patent ID: 11941872
Assignee: ZHEJIANG GONGSHANG UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 2:
3. The method according to claim 1, wherein step 2 comprises:
step 2-1: sampling the video features obtained in step 1 with a large step size to obtain temporally ordered basic clip feature vectors, and obtaining a series of temporally continuous clips with different lengths by combining basic clips;
step 2-2: selecting a candidate clip from all candidate clips by a sparse sampling strategy, and reducing redundant information as much as possible without affecting the performance of the model;
step 2-3: performing a maximum pooling operation on the basic clips in each candidate clip interval to obtain a feature of the candidate clip; and
step 2-4: representing features of all candidate clips by using a two-dimensional feature map, with starting and ending positions of each candidate clip corresponding to coordinates of the two-dimensional feature map, and placing a feature of each candidate clip in corresponding positions to finally obtain a two-dimensional feature map of the candidate clip.