Abstract: A method of improving edge rendering of objects containing run length encoded image pixel data collects two run-length encoded scanlines (upper and lower). Each run transition is inspected for the presence of interesting runs (object tag planes to be grown or shrunk). Depending on the position of the interesting runs relative to the run transition (e.g., in upper or lower scanline, to right or left of boundary), the tag planes of the surrounding runs will be modified. If a tag plane needs to be modified in the fast scan direction, a new run (one or more pixels in length, with the original color) is inserted at the run transition and assigned to the tag plane of the interesting run. If a tag plane needs to be modified in the slow scan direction, the run is subdivided and subsequently assigned to the tag plane of the interesting run.

Abstract: A system for installing a printer driver for a printer connected on a network includes a printer driver for the printer; an installer, located on a host device connected on the network, responsive to activation, for listening for the printer's identification, and responsive to receipt of the printer's identification, for installing the printer driver on the host device; and a beacon, located at the printer, responsive to an input, for broadcasting the printer's identification on the network.

Abstract: Shifting a page image while it is still in compressed form. The page image is compressed into independent strips that are a full page in the fast scan direction, and a small number of scanlines in the slow scan direction. Then, to shift the page image, whole strips can be deleted in one margin and/or deleted from the other. If the number of scanlines per strip is small enough, the difference in a margin created by the change of one strip will not be apparent. This invention can be used to advantage when it is decided at print time that the output shall be in the form of a saddle-stitched booklet requiring two-up printing, folding and subsequent trimming of the outside edges to uniform alignment. Here, a progressive page shift can be introduced at the printer controller while the images are still compressed, instead of requiring the change to be done to the PostScript Master, which would require reRIPing or decompression, shift and recompression.