1. A mobile terminal comprising: a wireless communication processor configured to provide wireless communication; a sensor; a camera; a touch screen; a memory; and a controller configured to: display a preview screen obtained through the camera on the touch screen, receive a first user gesture for capturing an image corresponding to the preview screen, capture the image corresponding to the preview screen after a predetermined time period from receiving the first user gesture, and display a preview pop-up window including the captured image overlaid on the preview screen, wherein the preview screen includes a current image obtained by the camera, and wherein the controller is further configured to: determine whether the mobile terminal satisfies a preset condition, if the mobile terminal satisfies the preset condition, stop displaying the pop-up window in response to the preset condition and receive a second user gesture for capturing the current image obtained by the camera, capture the current image obtained by the camera after the predetermined time period from receiving the second user gesture, display another preview pop-up window including the captured image overlaid on the preview screen, sense a first position of the mobile terminal when receiving the first and second user gestures, display the preview pop-up window including the captured image when the mobile terminal is moved to a second position different than the first position, and capture another image when the mobile terminal is moved back to the first position from the second position without having to receive a user gesture.