Visible Watermarking Technique Based on Human Visual System for Single Sensor Digital Cameras

Table 2

Watermark unobtrusiveness evaluation.

MOS	Description
5	Excellent. High quality image. The detail of host image can be observed completely
4	Good. Visual degradation is minimum. The detail of host image can be observed with minimum effort
3	Fair. Visual degradation is acceptable. Some area of host image can be observed with some effort
2	Poor. Visual degradation is high. Some areas of host image are not observed due to obtrusive watermark
1	Unacceptable. Visual degradation is unacceptable. Major part of the host image is not observed due to very obtrusive watermark