Quaternions

Quaternion Discrete Fourier Transform-Based Color Image Watermarking Method Using Quaternion QR Decomposition
In this paper, a new Quaternion Discrete Fourier Transform (QDFT)-based digital color image watermarking method is presented. In …
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Quaternion-Based Image Hashing for Adaptive Tampering Localization
Image-hashing-based tampering detection methods have been widely studied with continuous advancements. However, most of existing models …
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