Title :
Watermarking Scheme Based on DCT and DHT
Author :
Zhou, Jianqin ; He, Lingyun ; Shangguan, Cheng
Author_Institution :
Telecommun. Sch., Hangzhou Dianzi Univ., Hangzhou, China
Abstract :
A new watermarking scheme based on DCT and DHT is presented. First,the host image is transformed as a whole by DCT. Second, the low and middle frequency region of the coefficient matrix is transformed by DHT. At last the watermarking image is embedded into the region of the DHT coefficient block. The experimental results show that the scheme is easy to be realized and the embedded watermark is effectively robust against various image processing operations such as JPEG lossy compression, noise, cropping, scaling, filtering etc.
Keywords :
discrete Hartley transforms; discrete cosine transforms; image coding; watermarking; DCT transform; JPEG; discrete Hartley transform; image processing operations; image watermarking scheme; lossy compression; Copyright protection; Data mining; Discrete Fourier transforms; Discrete cosine transforms; Discrete transforms; Frequency; Image coding; Image processing; Noise robustness; Watermarking; DCT; DHT; Information hiding; digital watermarking; robustness;
Conference_Titel :
Electronic Commerce and Security, 2009. ISECS '09. Second International Symposium on
Conference_Location :
Nanchang
Print_ISBN :
978-0-7695-3643-9
DOI :
10.1109/ISECS.2009.259
