本文通过分析LSB隐写对真彩色图像像素分量和统计特性的影响，提出了一种基于分量和频率相关的24位真彩色图像检测方法。该方法根据对载密图像再次隐写后其分量和的频率相关量趋于均匀的统计特征，构造衡量相邻分量和频率相关性的统计量来判断隐秘信息的存在。实验结果表明，该方法可以获得优于RQP方法的检测性能与计算复杂度。

By analyzing the impact of LSB replacing to the sum of RGB components of color image statistical properties,a new steganalytic approach for 24bit color images is proposed,which is based on the  frequencyrelated  sum of the RGB color components in a pixel. A classifier is constructed to identify the stegoimage from the normal images,which is based on the characteristics that the frequencyrelated  three color components’ sum of adjacent pixels is closer.The experimental results show that the proposed method outperforms the RQP steganalysis method in detection performance and in computation complexity.