1. A method of capturing an image in a digital camera, comprising: receiving a previous image input of a previous image frame and forming a sharpness value of the previous image input, wherein the previous image input is a subframe of the previous image frame and wherein the previous image frame is an image frame immediately preceding a current image frame; receiving a current image input of the current image frame and forming a sharpness value of the current image input, wherein the current image input is a corresponding subframe of the current image frame; predicting that a next image frame motion will be less than a current image frame motion, the prediction being based at least on the sharpness value of the previous image input, the sharpness value of the current image input, and on a difference between a sharpness value of the subframe of the current image frame and a sharpness value of the corresponding subframe of the previous image frame, wherein the subframe of the current image frame is a last subframe of the current image frame and an absolute value of the difference is less than a selected factor multiplied by a maximum of absolute values of other consecutive sharpness value differences; deciding to capture a next image frame responsive to the prediction; and capturing the next image frame.