1. An electric hand-vibration correction method comprising: dividing each of frame images output from an effective pixel region of an imaging element in frame order into a plurality of segment images; calculating a movement vector of each segment image between the frame images; calculating a hand-vibration vector that is a movement vector of each entire frame image, from the movement vectors for the respective segment images; determining an image output region that is cut out from each frame image, based on the hand-vibration vector; and calculating an infinite point based on an intersectional position among the calculated movement vectors of the respective segment images, wherein the image output region is determined using a vibration vector between the infinite points calculated for the respective frame images as the hand-vibration vector, wherein a straight line connecting a infinite point calculated for a certain frame image and a central point of the certain frame image is calculated, and the image output region is determined based on a component, of the vibration vector between the infinite point calculated for the certain frame image and an infinite point calculated for a next frame image, perpendicular to the straight line with a component, of the vibration vector between the infinite point calculated for the certain frame image and the infinite point calculated for the next frame image, along the straight line being ignored.