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本文分析了不同图像信号源的特点，提出了彩色图像数据采集的硬件设计方案。论述了数字化参数的选择原则。较详细地分析了所设计的两种锁相环电路：以彩色同步为基准的单片锁相环和以行频ｆＨ 为基准的锁相环。两种锁相环产生的时钟信号分别适合于标准信号和非标准信号。最后简述了帧存贮体和接口设计。本文提出的实时采集方案具有硬件少、软件简单、调试容易等优点
In this paper, the characteristics of different image sources are analyzed, and the hardware design of color image data acquisition is proposed. The principle of digital parameter selection is discussed. Two kinds of PLL circuits are designed in detail: single-chip phase-locked loop with color synchronization and phase-locked loop with fH as the reference. The clock signals generated by the two PLLs are suitable for standard signals and non-standard signals respectively. Finally, frame memory and interface design are briefly described. The real-time acquisition scheme proposed in this paper has the advantages of less hardware, simple software and easy debugging