Appearance-based Face Detection Methods
基于外观的人脸检测方法*

Through using the periodic property of DCT coefficients, the digital image scrambling transformation namely Zigzag Scan and JPEG quantifying coefficients, this paper proposes a meaningful 2-bit watermarking image embedding algorithm on block discrete cosine transform intemediate frequency AC coefficients. The cover image is not needed when extracting the watermarking data. The experiment results show that the algorithm has good robustness on image cut, JPEG and median filter.