Due to the low-level image features it utilizes, the semantic gap problem is hard to bridge and performance of CBIR systems is still far away from users' expectation. Image annotation, region-based image retrieval and relevance feedback are three main approaches for narrowing the "semantic gap". In this paper, recent development in these fields are reviewed and some future directions are proposed in the end.

This paper discusses the construction and implementation of forest early warning system from the perspective of large data storage, analysis and structure. In this paper, the architecture and model of the combination of video alert and large data forecast are proposed, and it analyzes and discusses it. Experimental results show that the method has good expansibility and superiority.

This paper discusses the construction and implementation of teeth holes filling mathod. The architecture and model of the combination of PONN multi-layer to cover teeth and fill holes of teething. Finally, the position of teeth is found, and the tooth model is placed through 3D space. Experimental results show that the method has good expansibility and superiority.

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