Methods and systems for recognition of repeating geometric units in a computer image are here disclosed. According to an aspect, a representation of a computer image is split into components and every component is analyzed to identify the role of this component on the computer image. Identified components could include but are not limited to: rooms, doors, furniture etc. In one embodiment components are identified based on the presence or absence of at least one other component. The presence of a door, in a non-limiting example, could be used to denote the presence of a room. In a further embodiment, the program may extract size and perimeter information necessary for estimating needed materials from a representation of a computer image.