一种基于DSP的宽范围自动曝光控制系统的设计

Design of an Auto-exposure Control System Based on DSP for Wide Exposure Range

为能拍摄出清晰的地面目标图像,航空相机需要自动曝光系统。提出了一种光圈和快门曝光时间均可调整的宽范围自动曝光控制原理,给出了基于DSP的自动曝光控制系统的硬件原理电路和软件设计。经测试和使用证明,系统适应曝光范围大,测量精确,工作稳定可靠。

For capturing high -resolution images of the ground target, automatic exposure control system is required for aerial cameras. A wide -range auto -exposure control principle is presented for controlling the diaphragm and shutter speed. The hardware electric circuits and the software design of the auto- exposure control system based on DSP are described. Tests and applications prove that the system has wide exposure range, accurate control, high reliability and works steadily.