有没有创新的水印技术并不能使水印明显吗？ [英] Is there any innovative watermarking technique that doesn't make the watermark obvious?
问题描述
有没有水印技术不通过就可以识别源分析图像进行水印很明显了吗？
Is there a watermarking technique which doesn't make the watermark obvious yet by analyzing the image you can identify the source?
推荐答案
是的，这就是所谓的稳健数字水印（图像）。一个强大的数字水印应该是可识别的，甚至当你的COM preSS，调整大小，裁剪或翻译的形象。因为你不能嵌入强大的数字水印为最低阶位，说（因为他们迷失在COM pression），这个过程通常是
Yes, it's called "robust" digital watermarking (of images). A robust digital watermark should be recognizable even when you compress, resize, crop or translate the image. Because you can't embed robust digital watermarks into lowest-order bits, say (as they get lost in compression), the process is typically
- 在转换图像到其他空间，比如使用离散余弦变换
- 嵌入在变换空间中的水印
- 变换化合物结果回原始的空间，如反向离散余弦变换
顺便说一句，为了使水印不很明显，但可识别的，你只需要确保这本身水印是随机的，这样你无法立即识别它，即使你进行水印提取过程，如果你不知道水印应该的。
BTW in order to make the watermark non-obvious but recognizable, you just need to make sure that the watermark in itself is random so that you can't immediately recognize it even if you carry out the watermark extraction procedure if you don't know that the watermark should be.
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