Non-negative matrix factorization-based reversible watermarking method for frequency domain robust image

The invention discloses a non-negative matrix factorization-based reversible watermarking method for a frequency domain robust image. The method comprises the specific steps of (1) generating a binary watermark; (2) performing block segmentation on a carrier image; (3) performing Slantlet transformation; (4) performing non-negative matrix factorization; (5) calculating horizontal coordinates of a centroid; (6) generating a polarity horizontal coordinate sequence; (7) storing a key; (8) performing block segmentation on a to-be-detected image; (9) performing Slantlet transformation; (10) performing the non-negative matrix factorization; (11) calculating the horizontal coordinates of the centroid; (12) generating a to-be-detected polarity horizontal coordinate sequence; and (13) extracting the watermark. According to the method, the problems of low watermarking capacity, low visual quality and low robustness of a watermark-containing image in an existing robust reversible watermarking method are solved; and a ro