Abstract: System and methods are described for storing and processing multiple bitmap images, such as those commonly employed in graphical user interfaces (GUIs), within a single "master" bitmap. Within a master bitmap, each image is bound by "corner brackets," each of which comprises a group of pixels which may be identified separately. Each image within a given master bitmap may be identified and processed as a separate image. Methods are described, for instance, for determining size, position, and identity of each image within a multi-image bitmap. Size is computed from the distance between the brackets surrounding an image; position may be computed relative to the position of the surrounding brackets. For identification, each image is provided with a unique ID or identifier, such as a number, embedded within the master bitmap itself. A method of the present invention for decoding an image from a master bitmap is also presented.