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针对在快速运动中连续高速地获取高质量的图像信息,提出了一种基于光圈优先的自动曝光控制方法。通过对初始图像的评估,确定当前景物亮度下最佳光圈大小,进而获得此光圈下不同景物亮度的曝光时间,由此建立景物亮度与曝光时间的关系模型。在实际运用中根据关系模型,通过跟踪当前景物亮度动态调整曝光时间以达到获取最佳曝光量的目的。该方法具有实时、快速、成像质量高和控制精确可靠的特点,并在实际应用中得到验证。
Aiming at obtaining high-quality image information continuously and rapidly in fast motion, an automatic exposure control method based on aperture priority is proposed. Through the evaluation of the initial image, the optimal aperture at the current scene brightness is determined, and then the exposure time of different scene brightness under this aperture is obtained, thereby establishing the relationship model between the brightness of the scene and the exposure time. In practical application, according to the relational model, the exposure time can be dynamically adjusted by tracking the brightness of the current scene to achieve the optimal exposure. The method has the characteristics of real-time, fast, high-quality imaging and precise control, and has been verified in practical applications.