Electrical Engineering Department, University of Montenegro, Podgorica, Montenegro, Yugoslavia.
IEEE Trans Image Process. 2001;10(4):650-8. doi: 10.1109/83.913599.
A two-dimensional (2-D) signal with a variable spatial frequency is proposed as a watermark in the spatial domain. This watermark is characterized by a linear frequency change. It can be efficiently detected by using 2-D space/spatial-frequency distributions. The projections of the 2-D Wigner distribution--the 2-D Radon-Wigner distribution, are used in order to emphasize the watermark detection process. The watermark robustness with respect to some very important image processing attacks, such as for example, the translation, rotation, cropping, JPEG compression, and filtering, is demonstrated and tested by using Stirmark 3.1.
提出了一种在空域中作为水印的二维（2-D）信号，其空间频率可变。该水印的特征在于线性频率变化。可以使用二维空间/空间频率分布来有效地检测。使用二维 Wigner 分布的投影-二维 Radon-Wigner 分布，来强调水印检测过程。通过使用 Stirmark 3.1 证明和测试了水印对于一些非常重要的图像处理攻击的鲁棒性，例如平移、旋转、裁剪、JPEG 压缩和滤波。
