hucaiping, QIN xiaolin, REN Ren. The improvements and experiments of local spatial outlier detecting algorithm[J]. Journal of Image and Graphics, 2010, 15(10): 1471. DOI: 10.11834/jig.20101020.
The LOF (local outlier factor) algorithm is a very distinguished local outlier detecting method
which assigns each object an outlier-degree value. In this paper
we present the two improvements of this algorithm. First
the two step improvements was introduced and their time complexity was analysed. Second
when the algorithm identified local outliers
it can consider spatial attributes and non-spatial attribute. The experiments have tested the executing time of the LOF algorithm and its improvements
the performance of computing synthetic and real data set. The experimental results show that is its improvements outperform the LOF algorithm in efficiency and performance.