【摘要】 针对图像在网络传输中的隐私信息泄露问题,提出了一种基于二维码和可逆可视水印的图像隐私保护方案。为了保护图像拍摄时间、拍摄地点和详细描述等隐私信息,首先将这类隐私信息加密后存储在云平台,并生成能够链接到加密隐私信息的统一资源定位符。该方案将统一资源定位符编码成二维码,并将该二维码作为可视水印可逆地嵌入图像中,实现对隐私信息的访问权限控制。在该方案中,使用视觉感知模型选择适合的水印嵌入参数,以平衡水印的可视性和载密图像的视觉质量。实验结果表明,该方案能够保证载密图像具有良好的视觉质量,同时不影响二维码的正确识别和解码。使用所提方案在保障图像传输质量的同时,也降低了隐私泄露的风险。更多还原

【Abstract】 With the privacy leakage problem of image delivery in networks, an image privacy preservation scheme based on QR code and reversible visible watermarking was proposed. In order to preserve the privacy information including shooting time, shooting location and detailed description, the encrypted privacy information was stored in cloud platforms and corresponding universal resource locator was generated firstly. Secondly, the universal resource locator was encoded as the QR code and it was embedded into the cover image using reversible visible watermarking. Therefore, the access control for privacy information could be achieved. The visual perceptual model was utilized to select adaptive watermark embedding parameters to balance watermark visibility and marked image quality. Experimental results demonstrate that the good visual quality of marked images can be obtained and the embedded QR code can be correctly decoded. The proposed scheme can guarantee marked image quality and reduce the risk of private information leakage.更多还原