Abstract: A method for viewing images comprises: providing a user interactive image file viewing device 100; segmenting an image file 200 by establishing an offset, a line size, and a step size 201, the offset and line size relating to a first dimension (horizontal) and the step size relating to a second dimension (vertical) being orthogonal to the first dimension, the step size comprises a fixed number of lines, iteratively reading the segment into memory line by line beginning at the offset, until the step size is reached 202. In this manner, the sub-part of an image may be efficiently accessed without having to read the entire image into memory.