Title :
Analysis and improvement of correlation-based watermarking methods for digital images
Author :
Miyazaki, Akio ; Okamoto, Akihiro
Author_Institution :
Graduate Sch. of Inf. Sci. & Electr. Eng., Kyushu Univ., Fukuoka, Japan
fDate :
6/24/1905 12:00:00 AM
Abstract :
This paper aims to design robust correlation-based watermarking methods for images. We first present a model of watermark embedding and extracting processes and carry out their analyses. Then we examine the robustness of the watermarking method against image processing and clarify the reason why detection errors occur in the watermark extraction process. Based on the result, we improve the watermark extraction process and design robust watermarking systems. The improvement is accomplished using the deconvolution technique. Numerical experiments using the DCT-based watermarking system show good performance.
Keywords :
copy protection; correlation methods; deconvolution; discrete cosine transforms; image coding; DCT-based watermarking system; correlation-based watermarking methods; deconvolution technique; detection errors; image processing; pseudorandom sequence; robust watermarking systems; still images; watermark code; watermark embedding process model; watermark extraction process model; watermarking method robustness; Digital images; Discrete wavelet transforms; Image analysis; Image processing; Information science; Process design; Random sequences; Robustness; Signal processing; Watermarking;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010198
