为了准确地估计出隐藏图像的嵌入率，利用LSB隐写对图像小波细节信息影响较大这一特点，首先给出了图像的小波细节信息和小波细节信息能量的定义，同时利用LSB隐写图像计算出其原始图像的小波细节信息能量；然后根据隐写图像与原始图像的小波细节信息能量，估计出LSB隐写图像的嵌入率。实验证明，该方法在隐藏图像嵌入率不是很低的情况下，能够比较准确地估计出隐藏图像的嵌入率。

According to the characteristic of which LSB steganography can influence the image wavelet detail information, this article presents the definition of images, with wavelet detail information and the wavelet detail information energy. We calculated the wavelet detail information energy of carrier image according secrete image,and estimated LSB steganography rate using two image wavelet detail information energy. The experiment proved that this method is efficient in estimating LSB steganography when the embedding rate is not too small.