If the Touch-Down is detected, Touch-On is simultaneously detected. After the Touch-Down, normally, the Touch-On continues to be detected until the Touch-Up is detected. Touch-Move is detected also in a state in which the Touch-On is being detected. Even if the Touch-On is detected, Touch-Move is not detected unless the touch position moves. After the detection of the Touch-Up of all fingers or a stylus that have been touched on, the Touch-Off is detected.
A first shutter switch 62 is turned ON in the middle of an operation of the shutter button 61 provided on the digital camera 100, that is, by so-called half press thereof (i.e., an image capturing preparation instruction), thereby generating a first shutter switch signal SW1. According to the first shutter switch signal SW1, an operation of autofocus (AF) processing, automatic exposure (AE) processing, automatic white balance (AWB) processing, flash preliminary emission (EF) processing, or the like is started.
A second shutter switch 63 is turned ON upon completion of an operation of the shutter button 61, that is, by so-called full press thereof (i.e., an image capturing instruction), thereby generating a second shutter switch signal SW2 (an image capturing instruction operation). According to the second shutter switch signal SW2, the system control unit 50 starts operations of a series of imaging processes starting from the readout of a signal from the imaging unit 103 up to writing of image data onto the recording medium 200.