3. The video summarization method as claimed in claim 2 , wherein when performing concept expansion of the roots taken from the annotations of each shot, identify related words of the annotations through an automatic dictionary inquiring step to build up the concept expanding tree for each shot.
3. The video summarization method as claimed in claim 2 , wherein when performing concept expansion of the roots taken from the annotations of each shot, identify related words of the annotations through an automatic dictionary inquiring step to build up the concept expanding tree for each shot. 4. The video summarization method as claimed in claim 3 , wherein the annotations and related words thereof in each shot are nouns or verbal nouns.