Key frame extraction of online video based on optimized frame difference

Key frame extraction is a basic technology of online video retrieval and abstract establishing. Efficient key frame extraction technology can promote the development of widely-used video browsing technology. In this paper, we first reviewed some commonly-used key frame extraction technology, and then proposed a key frame extraction technology based on optimized frame difference, which measures the similarity of two adjacent frames´ contents in terms of the information of frame difference, and extracts key frames after optimizing the frame difference. The experiment results show that the proposed algorithm can extract key information of online video efficiently, and has a good description in the aspect of changes in the movement of the lens.