| 摘要 |
Process for generating a video tag cloud representing objects appearing in a video content, said process providing: a step (B) for extracting video frames of said video content and individually segmenting said video frames into regions; a step (C) for building, for each extracted frame, a topology graph for modelizing the space relationships between the segmented regions of said frame; a step (D) for extracting from the set of built topology graphs frequent patterns according to spatial and temporal constraints, each pattern comprising at least one segmented region; a step (E) for regrouping frequent patterns representing parts of a same object by using trajectories constraints, so as to detect frequent objects of said video content; a step (F) for determining, for each detected frequent object, a weighting factor to apply to said object according at least to spatial and temporal constraints used for extracting the patterns of said object and to trajectories constraints used to regroup said patterns; a step (H) for generating a video tag cloud comprising a visual representation for each of said frequent objects according to their weighting factors. |
