In view of the weak contrast images, a digital image AGC method based on FPGA and the operating principle of AGC are presented in detail. The corresponding flow chart and the practical application effectiveness are given.

• 针对图像对比度弱的情况,提出了一种基于FPGA的数字图像自动增益控制实现方法,较为详细地阐述了自动增益控制的基本工作原理,给出了相应的流程图和实际应用效果图。