Method and device for determining visual impairment of camera

The invention relates to a method for determining a structural image of a window of a motor vehicle with the aid of a camera, the window separating the camera from surroundings of the motor vehicle. The method includes a highlighting of image structures present in the structural image with the aid of an illumination of the window, the image structures being suitable for ascertaining a visual impairment of a view of the camera through the window. The illumination is configured in such a way that it is not detected by a driver. A device for implementing the method is also provided. 本发明涉及一种用于借助摄像机确定机动车的窗板的结构图像的方法，其中，所述窗板将所述摄像机与所述机动车的周围环境分隔开，其中，本方法设置为，借助照明所述窗板突显存在于所述结构图像中的图像结构，其中，所述图像结构适用于求取摄像机透过所述窗板的透视性方面的光学影响，并且其中，这样设置所述照明，使得该照明不被驾驶员感知。此外，根据本发明设置一种用于实现所述方法的设备。