Mathematical Model Design of the Traditional Dress Recognition Algorithm Based on Digital Watermarking Technology

Table 4

Watermark robustness test results of the 256 ∗ 256-level gray Lena image.

Operations on images	1024 error bits	Error rate
JPEG compression (mass factor) = 0	112	11.05
JPEG compression (mass factor) = 5	85	8.03
JPEG compression (mass factor) = 10	53	4.97
JPEG compression (mass factor) = 15	38	3.54
JPEG compression (mass factor) = 20	26	2.43
JPEG compression (mass factor) = 30	13	1.35
Mosaic treatment	9	1.07
Image smoothing	34	0.34
Image Gaussian smoothing	3	3.45
Image sharpening	12	1.06
Enhanced image sharpening	16	1.32
Add evenly distributed noise	32	3.05
Add Gaussian distributed noise	12	3.78
Histogram equalization	16	1.25