Using pre-classification to attack LSB matching
图像LSB匹配隐藏的预分类检测模型

Most steganalysis methods for image LSB matching suffer from a drop in the performance when applied to different image databases, especially for JPEG-compressed and uncompressed covers, which is also the main restriction to prevent steganalysis from practical usage. In this paper,we specify, the JPEG compression of a bitmap by taking advantage of the quantized DCT alternating coefficients,which no longer obey the Benford's law very well. Then variations of steganalysis methods and parameter sets are exploited according to the number of channels and whether the image has been compressed before. The algorithms' performances get a great boost by the proposed working mode.