Title :
Multi-polarity complex hadamard transforms for phase watermarking algorithm
Author :
Falkowski, Bogdan J.
Author_Institution :
Nanyang Technol. Univ., Singapore
Abstract :
In this paper, a robust phase watermarking algorithm for still images is presented where the watermark information is conveyed in the phase spectrum in the transform domain. Phase watermarking algorithm that uses multi-polarity Complex Hadamard transform is developed. The robustness of presented algorithm is investigated by its uniqueness, JPEG encoding, image resizing, dithering noise distortions, sharpening, cropping and successive watermarking.
Keywords :
Hadamard transforms; image coding; watermarking; JPEG encoding; complex Hadamard transforms; cropping; dithering noise distortions; image resizing; multipolarity Hadamard transforms; phase spectrum; phase watermarking algorithm; sharpening; still images; Cryptography; Digital images; Digital signal processing; Distortion; Explosives; Image coding; Logic design; Noise robustness; Signal processing algorithms; Watermarking;
Conference_Titel :
Information, Communications & Signal Processing, 2007 6th International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-0982-2
Electronic_ISBN :
978-1-4244-0983-9
DOI :
10.1109/ICICS.2007.4449718
