HEVC An Analysis method of Intra Prediction for Digital Watermarking based on HEVC

摘要

It relates to an analysis method of intra prediction for HEVC-based digital watermarking that receives an original sequence of images and selects a combination of conditions for detecting a block to be watermarked in the sequence, wherein (a) the optimal mode is not changed. For each different mode in which the non-identical mode and the optimal mode change, the distortion cost for the optimal mode of the prediction block is obtained, the characteristic value of the distortion cost is set, and upper and lower thresholds for the distortion cost are set using the set characteristic value. to set a condition for the distortion cost as a first condition; (b) setting the mode variance calculated using a predetermined number of prediction modes having the minimum distortion cost for the prediction block, and setting the mode variance as a second condition by setting the range of the mode variance ; (c) setting a condition for the prediction block to determine whether the prediction mode is a directional mode or a non-directional mode as a third condition; (d) setting whether the prediction block is divided as a fourth condition; and (e) setting a combination of conditions including at least one of the first to fourth conditions, and searching for a combination of conditions with the highest probability of finding a prediction block in which the optimal mode does not change. set up a configuration to According to the method as described above, by finding a block that does not change in the intra frame, digital watermarking can be effectively inserted into the HEVC-based image by watermarking the corresponding block.