关键词: 最优直方图对, 无损数据隐藏, 整数小波, 最优阈值, 直方图调整, 最优嵌入区

Abstract: Embedding location map is a commonly used method for image data hiding; however, it has little payload and the visual effect is not good enough. Therefore, a lossless data hiding scheme of histogram pair was proposed based on multi-gray image authenticity certification. It applied the Integer Wavelet Transform (IWT) to gray image, selected the optimum threshold in the histogram, and made the histogram pair to embed data. The experimental results show that the Peak Signal to Noise Ratio (PSNR) is up to 46dB in the payload of 0.1bpp (bit per bixel), and the proposed scheme is effective.

Key words: optimum histogram pair, lossless data embedding, integer wavelet, best threshold, adaptive histogram modification, suitable embedding region