A liquid crystal display device with controllable viewing angle of the present invention has an upper substrate on which an upper substrate common electrode is disposed, a lower substrate on which a pixel electrode is disposed, and a liquid crystal layer sandwiched between the upper substrate and the lower substrate. Another PSF cost function for determining a PSF kernel includes a first fidelity term with a first derivative in a dominant edge direction, and a second fidelity term having a second derivative in a perpendicular direction to the dominant edge direction. The measurements are taken relative to a reference portion of the connector.