Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2001.09a
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- Pages.223-226
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- 2001
Watermarking for Tamper Proofing of Still Images
정지영상의 Tamper Proofing을 위한 워터마킹
Abstract
In this paper, we propose a robust and fragile watermarking technique for tamper proofing of still images. Robust watermarks are embedded by quantization with a robust quantization step-size, and it is imperceptible value for human visual system. Fragile watermarks are embedded by thresholding and quantization with EW(Embedded Zerotree Wavelet) algorithm. The proposed method enables us to distinguish malicious change from non-malicious change. Futhermore this technique enables us to find tampering regions and degrees.
Keywords