Bit plane coding is a two-tone coding technique for the multi-gray scale image.

比特平面编码是一种多值灰度图象的二值编码技术。

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Therefore, a lossless data hiding scheme of histogram pair was proposed based on multi-gray image authenticity certification.

针对此不足，提出一种基于多灰度图像真实性认证的直方图对无损数据隐藏新方法。

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I hoped which day you can give me an opportunity, adorns your gray life multi-colored!

我希望哪天您能给我机会，装饰您的灰色生活多彩多姿。

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When Portland skies begin to look moody and gray, duck into this multi-level bookstore to peruse the shelves of new and used books.

CNN: Portland bewitches travelers, rain or shine