Abstract: Because of semantic gap between low-level image features and high-level semantics, and user understanding image subj ectivity and variability, image retrieval results can not satisfy the needs of users. To solve this problem, PSO algorithm and relevance feedback were introduced into the image retrieval process,based on user feedback, W automatic adjustment and Beta adaptive mutation of PSO adjust the weights of the image feature dynamically, to improve search accuracy,better meet the needs of users.

Key words: Relevance feedback(RF) , Particle swarm optimization(PSO) , Image retrieval