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对焦窗口的选择是数码相机进行自动对焦的关键问题之一。现有的对焦窗口的选择方法过于简单,由于成像目标的复杂性,有必要使对焦窗口的选择本身实现自动化和智能化[1]。提出了一种利用数字图像处理来进行瞳孔控制自动对焦的方法。对现有照相机结构稍加改进后,可以利用数码相机中现有的CCD/CMOS图像传感器获取拍摄者眼睛的图像,再通过对拍摄者眼睛的图像进行处理来判断其瞳孔在眼睛中的位置。根据这一位置信息,可以推断拍摄者的注意力所集中的区域,从而对焦窗口的自动选择。
The choice of focus window is one of the key issues for autofocusing digital cameras. The existing method of selecting the focus window is too simple. Due to the complexity of the imaging target, it is necessary to automate and intelligently select the focus window. A method of pupil-controlled autofocus using digital image processing is proposed. After slightly improving the structure of the existing camera, the existing CCD / CMOS image sensor in the digital camera can be used to obtain the image of the photographer’s eye, and then the photographer’s eye image can be processed to determine the position of the pupil in the eye. Based on this position information, it is possible to deduce the area where the photographer’s attention is focused, thereby automatically selecting the focus window.