1. An image generating method, the method comprising: displaying a live view image on a screen of an image generating apparatus; comparing a shutter speed with a frame rate of the live view image when there is a command to image a still image during the displaying of the live view image; adding current frame data of the live view image to next frame data of the live view image to generate added next frame data when the shutter speed is smaller than the frame rate of the live view image; and reading out the added next frame data of the live view image to generate the still image.