The moment is employed to preprocess system that it is good method to normalizing the scale and rotation of human face.

其中，矩的方法被用于人像进行预处理，因为它能有效地对人像的伸缩和平面旋转进行矫正；

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In system each interface logic control and image preprocess are implemented by FPGA, so the design of FPGA's internal logic and algorithms realization in FPGA is the focus of this article.

系统中fpga实现各种外围逻辑控制和图像预处理算法，FPGA的内部逻辑设计和算法实现是本文讨论的重点。

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And the paper studies and works out monitoring software in the whole system, including A/D acquisition and control, data exchange, DCI driver and digital signal filtering and data preprocess software.

并研究编制了整个系统的监控软件，包括A/D 采集和控制、数据通讯、显控等部分接口驱动程序以及数字信号滤波数据预处理软件；

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