A method for avoiding an obstacle or an image-quality-degrading optical phenomenon in an image recognition unit is provided. The method includes the steps of providing at least an optical shutter array in the image recognition unit, detecting the obstacle or the optical phenomenon, and closing the optical shutter that corresponds to the portion affected by the obstacle or the optical phenomenon. The method can be readily implemented even when the space for implementing the method is small, for example, in a small space in a camera currently in use, and driving power consumed in the method is small. In an image affected by an obstacle attached to a lens or a protective cover for the lens in an imaging device or an optical phenomenon produced by the lens or the protective cover for the lens in the imaging device, an imaging method and image processing are used to avoid the obstacle or the optical phenomenon produced by the lens or the protective cover for the lens in the imaging device without removing the obstacle or optical phenomenon itself.