数字水印技术和JPEG2000编码过程的统一

本文提出了一种将数字水印技术和JPEG2000压缩编码实现过程相统一的方法。JPEG2000是新一代静止图像压缩编码标准,它是在EBCOT(优化截断嵌入式块编码)算法的基础上形成的。本文结合JPEG2000格式压缩码流的形成过程,以位平面为处理平台嵌入水印,根据需要在图像解码端检测水印,实现水印技术和编码算法的统一。与传统方法相比,该方法节省了将嵌入水印的图像进行二次压缩的运算成本,提高了检测水印的效率:充分利用了JPEG2000编码的优越性,在图像进行渐进的有损传输或在较高的压缩比时仍能有效地检测到水印,具有较高的鲁棒性。

An Integration of Digital Watermarking and JPEG 2000 Coding

An integration of digital watermarking technique and JPEG 2000 processing is proposed in this paper. JPEG 2000 is the new generation of compression standard for still image, which is based on EBCOT (Embedded Block Coding with Optimized Truncation). The watermark is embedded on bit-planes in the formation of JPEG 2000 format bit-stream and is detected when necessary. This scheme saves the computational cost to compress watermarked image and also detects watermark more efficiently. Experimental results show that the watermark scheme is robust to general image processing and attack.