In an image sensing apparatus which has a camera shake correction function
of performing a camera shake correction on a plurality of images sensed
by an image sensing unit by extracting a partial image from each of the
sensed images on the basis of correlation between the sensed images, the
image sensing unit is exposed, and image signals are read out at
predetermined periods. The image sensing apparatus selectively outputs
either each of the image signal read out at the predetermined period as
one image, or each of image signals obtained by adding image signals for
latest n (n is a natural number not less than 2) periods while performing
a camera shake correction on the image signals read out at the
predetermined period, and the sum image signal as one image.