【摘要】 本文提出一种适用于JPEG图像认证的脆性盲水印算法,采用DCT整型变换避免舍入误差产生的误报,水印由DCT域checksum算法生成,并在水平、垂直二个方向检测。实验表明,水印图像具有良好的主观质量,并可准确定位篡改区域。更多还原

【Abstract】 In this paper, a fragile blind watermarking scheme is proposed for JPEG image authentication. Integer DCT transform is used to avoid false alarms caused by rounding errors. The watermark is generated by checksum algorithm in DCT domain and detected in horizontal and vertical directions. Experimental results demonstrate that watermarked image with good subjective quality is obtained and the tampered areas are located precisely.更多还原