Thirteen healthy men and women, averaging 62 years old, walked on a treadmill. Then the researchers placed a thin wooden block on the treadmill headed towards them.
13名平均年龄为62岁的健康男性与女性在跑步机上走路，研究人员在他们的脚前放上一块薄木块，这些志愿者们不得不跨过这个木块才能在跑步机上继续走路。
Not averaging watermark values extracted from one block, We use an intelligent method to get the last watermark.
水印的提取不直接取多个系数中水印的平均值，而是采用了一种自学习智能化方法。
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