Abstract: A method for creating minimal data representing a source image is presented. The source image is divided into a grid of cells. A color is selected for each cell corner based on sampling an area defined by the cell corner. An indication of the selected color is stored in an array dependent on the co-ordinates of the cell corner in the source image.

Abstract: A method for creating minimal data representing a source image is presented. The source image is divided into a grid of cells. A color is selected for each cell corner based on sampling an area defined by the cell corner. An indication of the selected color is stored in an array dependent on the co-ordinates of the cell corner in the source image.

Abstract: A coin roll dispenser has a number of coin magazines each filled with rolls of coins of a given denomination and removably seated within a housing. Each magazine has a motorized conveyor adapted to receive and sequentially dispense individual coin rolls through a discharge aperture into a discharge passage which transports the coin rolls dispensed from the magazines to a receptacle from which they may be removed by a purchaser. Dispensing is controlled by activating the conveyor in selected magazines. A first sensor detects the coin rolls as they are dispensed from the magazines and a sensor in advance of the receptacle produces a total count which is compared with the total ordered and the total from the first sensor.