An image processing apparatus of the present invention includes: a dynamic image acquiring unit acquiring a dynamic image； a time range setting unit setting a first time range and a second time range in an overall time of the dynamic image； a thumbnail generating unit generating a first thumbnail image and a second thumbnail image that are still images obtained by performing statistical processing on frame images in the first time range and frame images in the second time range, respectively； and a display unit displaying the first thumbnail image and the second thumbnail image so that they can visually be compared with each other.
