FIG. 8(A) shows an embodiment in which the image sensor 17 is driven to move along a circular closed path having a radius r of 2^1/2/2 times the pixel pitch P. FIG. 8(B) shows an embodiment in which the image sensor 17 is driven to move along a square closed path, each side of which having a length equal to the pixel pitch P. In the embodiment shown in FIG. 8(B), the image sensor 17 is driven alternately in the Y-axis direction of the pixels 17a, which is parallel to one of mutually orthogonal alignment directions (perpendicular direction) of the pixels 17a, and in the X-axis direction of the pixels 17a, which is parallel to the other direction (horizontal direction), per unit of the pixel pitch P so that the image sensor 17 moves in a square closed path.

As described above, if the image sensor 17 is moved once around along the circular or square path during an exposure, since the object-emanating light rays (ray bundle) incident on the center of each color filter R, G and B (each pixel 17a) appear as if they are equally incident on four color filters R, G, B and G, the effect equivalent to that obtained using an optical low-pass filter is obtained. Namely, the light rays incident on any of the color filters R, G, B and G (the pixels 17a) are reliably incident on the peripheral color filters R, G, B and G (the peripheral pixels 17a), so that the effect (an LPF effect) equivalent to that obtained in the case where the light rays are passed through an optical low-pass filter is obtained.