A Modified Digital Image Watermarking Scheme Based on Nonnegative Matrix Factorization
Shamszadeh Mohammad Ali, Alimohammad Latif, Rabbani Mohsen · 2012
This paper presents a modified digital im age w atermarking method based on nonnegative matrix factorization. Firstly, host image is factorized to the product of three nonnegative matrices. Then, the centric matrix is transferred to discrete cosine transform domain. Watermark is embedded in low frequency band of this matrix and next, the reverse of the transform is computed. Finally, w atermarked im age is obtained by multiplying nonnegative m atrix components. The ex perimental r esults show that the proposed method is transparent and also is high robust against JPEG compression, scaling and median filter attacks.