Based on research results of Least Significant Bit (LSB) steganography in BMP images,this paper describes a run length detecting algorithm and gives the principle and realization of algorithm.

• 本文在深入研究BMP图像LSB隐写算法的基础上，在图像隐写分析中提出了游程检验算法并给出了算法原理和工程实现。