Techniques are described for synchronizing the timing of the receiver with the received waveform in ultra wideband communication systems. Another detection apparatus has an emitting portion that emits detection light to an immersion area between the projection optical system and an object disposed on an image plane side thereof, and a light-receiving portion disposed at a predetermined position for the detection light; therein, at least one of size and shape of the immersion area is obtained based on light receiving results. More specifically, first, one or more photo ad templates are obtained for the user, where each photo ad template includes one or more photo wells.