Abstract:An infrared image clustering algorithm based on K-means distance similarity was proposed. Firstly, it re-clusters the space points which are gained by Isomap dimension reduction algorithm. Secondly, by introducing density factor, some isolated points can be further eliminated and the initial clustering center can be selected by the difference of distance similarity, making the compactness within the data be strengthened. The experimental results show that the improved method is more effective and can also reduce the time complexity.