The public watermarking technique can extract or detect watermarks without the original photo.

公有水印技术是在水印提取或检测时不需要原始照片参与。

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A new invisible watermarking technique which could localize tampered areas for image authentication was proposed, based on image feature and public key cryptography.

提出一种基于图像特征和公钥密码系统的易损水印算法，在图像认证中能够定位图像被篡改的位置。

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In this paper, a block based adaptive watermarking technique in DCT domain that is similar to the public key system is proposed in light of the cryptography technique and image processing technique.

结合加密技术与图像处理算法，提出了一种类似于公开密钥体制的基于分块dct变换的数字图像自适应水印算法。

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