Abstract: To prevent rubbing of the printing mechanism against still wet ink on a buckled or curled sheet of an absorbent print medium after an inkjet printer has printed one swath of a high density image, printing of the next swath is delayed as a function of the maximum density of the ink drops deposited on the print medium for the printed swath(s). The required delay in printing the next swath is dependent on print mode and preferably uses a formula with empirically derived constants to allow sufficient time for the solvent in the ink to evaporate or otherwise disperse and to permit any buckling or curling of the print medium to stabilize.

Abstract: A method and apparatus for enhancing the quality of images printed by dot printers or dot displays are disclosed. Image irregularities caused by quantization are smoothed by using a set of rules to transform an initial pattern into an enhanced pattern for printing. The initial pattern may consist of a matrix of bits representing an image having X dots per inch along an intended direction of printing. An intermediate pattern is formed by replicating columns of bits from the initial pattern. Image enhancement rules are applied to the intermediate pattern to invert one or more bits in the intermediate pattern to create an enhanced pattern. The enhanced pattern is printed at n*X dots per inch along the direction of printing where n.gtoreq.1.

Abstract: A method and apparatus for enhancing the quality of images printed by dot printers or dot displays are disclosed. Image irregularities caused by quantization are smoothed by using a set of rules to transform an initial pattern into an enhanced pattern for printing. The initial pattern may consist of a matrix of bits representing an image having X dots per inch along an intended direction of printing. An intermediate pattern is formed by replicating columns of bits from the initial pattern. Image enhancement rules are applied to the intermediate pattern to invert one or more bits in the intermediate pattern to create an enhanced pattern. The enhanced pattern is printed at n*X dots per inch along the direction of printing where n.gtoreq.1.