An apparatus includes an imaging unit configured to output an image signal of a captured image, a display unit configured to display the image signal as an image, a swing detection unit configured to detect a component of acceleration of a swinging operation, an operation detection unit configured to detect the swinging operation, and a control unit to change the image to be displayed on the display unit based on the swinging operation, wherein the operation detection unit is configured, if the acceleration signal reaches a first and a second threshold values, to determine that the apparatus has been swung.