零水印是不对原图像数据进行修改的一种新的数字水印技术。

Zero watermark is a new digital watermarking technology without modifying the data of original image.

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这些算法在复原图像保边缘方面比经典复原算法有更好的表现。

These algorithms have better performance than classical restoration algorithms in image edge-preserving.

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在提取纹理特征时，为了减少计算量，首先对原图像进行压缩和灰度化。

In extracting texture characteristic, to cut down the amount of calculation, we compress the image and convert it to gray image.

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