针对指纹图像的采集、处理、显示，提出一种性价比好且易于实现的基于PC机、单片机和可编程逻辑器件的硬件平台。
A kind of hardware platform based on PC, MCU and FPGA is given for fingerprint collection, processing and displaying. It has a good performance and easy to be achieved.
针对检测数字图像灰度梯度的最大值法，采用SOBEL边缘检测算子对数字图像进行边缘检测，并利用硬件(大规模可编程逻辑器件CPLD)实现了数字图像的边缘提取。
The article will contrapose maximum value method based on detecting image grey grad, and take example of SOBEL operator to realize digital image fringe picking up based on hardware (CPLD).
硬件部分介绍了硬件整体结构，并对DSP及复杂可编程逻辑器件等部分的设计加以详细的介绍。
The whole structure of hardware and the designs based on DSP and CPLD are specially discussed in detail.
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