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ROI Based Quality Access Control of Compressed Color Image using DWT via Lifting

机译:基于ROI的DWT基于ROI的压缩彩色图像质量访问控制

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ROI (Region of Interest) in an image or video signal contains important information and may be used for access control at various qualities using multiresolution analysis (MRA). This paper proposes quality access control method of compressed color image by modulating the coefficients of ROI at various levels. Data modulation causes visual degradation in the original image and plays the key role in access control through reversible process. The modulation information, in the form of a secret key, is embedded in non-ROI part of the chrominance blue (Cb) channel of the color image using quantization index modulation (QIM). Lifting based DWT, rather than conventional DWT, is used to decompose the original image in order to achieve twofold advantages of (1) low loss in image quality due to QIM and (2) better decoding reliability. Only the authorized user having the full knowledge of the secret key restores the full quality of ROI. Simulation results duly support this claims.
机译:图像或视频信号中的ROI(感兴趣区域)包含重要信息,并且可以使用多分辨率分析(MRA)以各种质量用于访问控制。通过在各个层次上调节ROI系数,提出了一种压缩彩色图像的质量访问控制方法。数据调制会导致原始图像的视觉质量下降,并通过可逆过程在访问控制中起关键作用。使用量化索引调制(QIM),以秘密密钥的形式将调制信息嵌入到彩色图像的色度蓝(Cb)通道的非ROI部分中。基于提升的DWT而非常规DWT用于分解原始图像,以实现双重优势:(1)由于QIM造成的图像质量低损失,以及(2)更好的解码可靠性。只有完全了解密钥的授权用户才能恢复ROI的全部质量。仿真结果充分证明了这一观点。

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