This invention consists in an image processing method in which the
similarity between a first pixel and a second pixel constituting an image
is numerically given by statistical testing, and the values of the first
and second pixels are averaged when the similarity numerically given is
high, whereas the first and second pixel values are not averaged when the
determined similarity is low, whereby an image with noises suppressed is
obtained without spoiling a spatial resolution as well as a temporal
resolution.