For data retrieval from an image memory, in particular for compensation and/or estimation of motion in a digital video image, a window (S) is defined for an actual image segment (BD-B), the window including the actual image segment and one or more adjacent image segments. The window width is smaller than the image width.When progressing over the image the window (S) is shifted from one segment to the next with a vertical scanning direction (SC). An update area (UP-B) may be attached to the window (S) to prepare for processing of the next image segment concurrently with processing of the current segment.
