Abstract:In order to effectively improve the imperceptibility, robustness and security of image watermarking technology, a robust blind watermarking scheme based on region of interest and discrete wavelet transform is proposed. This scheme uses the region of interest of the host image as the watermark image. The requirements are met by the watermark generated from the host image, in conjunction with the embedding strategy and Arnold scrambling. First, the firstorder discrete wavelet transform is applied to the watermark, and the approximation coefficient is selected as the information to be embedded. Each approximation coefficient is embedded in the low frequency subband of the selected block of the host image in the wavelet domain; then, prior to embedding, the approximation coefficients of the watermark and the block of the host image are Arnold scrambled. This makes the solution more robust and secure. The test data show that compared with the current watermarking method, the proposed technique has better robustness and security, and the correlation coefficient NC of the watermark image is stable at around 0.98. Therefore, the proposed scheme could resist various attacks and achieve high security, imperceptibility and robustness.