This method firstly uses improved mean and variance to remove background, and then smooths it;

该算法首先用改进的灰度方差和均值进行初级分割，然后进行平滑；

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The paper is divided into some steps such as pre-processing to remove background color, gray, de-noising, binarization and normalized.

对笔迹图像的预处理过程包括纸张背景颜色去除，狄度化、消噪和二值化，归一化等步骤。

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People can do shoddy research online or off, but the learning opportunities provided today by online communications and resources remove almost any excuse for lack of background knowledge.

人们可以在线上或线下做粗劣的研究，但是今天由线上所提供的交流和资源却几乎剥夺了所有缺乏背景知识的理由。

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Emerging from a highly scientific background, the company first applied its image recognition technology to online retailers or businesses who wanted to remove pornographic images from their websites.

FORBES: Image Recognition Technology Goes Shopping