1. An apparatus for sampling images comprising: a probe angular velocity detector configured to detect an angular velocity of a probe representing a change in an angle of the probe at a surface of an object; an image segmenter configured to receive the angular velocity and an image captured by the probe, and to segment the image into sub-regions based on the angular velocity; and a differential sampler configured to sample the sub-regions with a different sampling rate based on a position of a sub-region.