最重要的是，这些扩展之间具有很强的互操作性，因而提供了更多的功能，比如通过交换格式来扩展可用性、W3C XPath、以及更多全面的功能。
Most importantly, the interoperability among these extensions is significant, providing additional functionality, like swapping formats to extend usability, W3C's XPath, and more, across the board.
实验证明，水印具有不可见性，对通常的图像处理，如JPEG压缩、剪切、缩放、中值滤波等以及噪声干扰都具有很强的鲁棒性。
Experimental results show the watermark is invisible and robust to common image processing operations such as JPEG compression, cropping, resizing, median value filtering and noise perturbation.
分析表明：精测方法具有很好的测量精度以及很强的环境适应性。
The analysis and experiments show that: The "accurate measure" method has a good measure accuracy and wide ambient adaptability.
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