Abstract: By introducing the subjective tests,a subjective optimized adaptive video watermarking algorithm was presented. This paper described an adaptive watermarking algorithm which is based on measured visibility thresholds of the impairments brought by watermarking. The visibility thresholds were determined by subjective tests. Constructions of the watermarking scheme were carried out such that the embedding strength is maximized without exceeding the measured visibility thresholds. Experimental results show that the presented watermarking scheme achieves comparatively high detection rate than spatial non-adaptive watermarking scheme and the simple human visual system based adaptive watermarking scheme.

Key words: Digital video watermarking, Subjective tests, Human visual system, Activity function, Activity factor, Masking function