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.