CPU电源管理说明了如何调整处理器的工作频率，从而节省大部分能量而不会明显降低性能。
CPU Power Management shows how to adjust the processor's frequency to save a maximum of energy without losing too much performance.
低功耗设计的关键技术包括选用低功耗的各类器件，低工作电压，对MCU进行时钟管理或休眠，对各部分电路和器件进行电源管理等。
Low-power oriented design techniques include selecting low-power parts, low operation voltage, managing clock of MCU or making MCU turn into dormancy, managing power supply of circuit and so on.
系统的硬件平台分为五个部分，分别是视频采集、数据存储、图像处理、结果显示和电源管理。
System hardware platform is divided into five parts, respectively is video acquisition, data storage, image processing, the results indicate, and power management.
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