Patent Document ID: 9230196
Application ID: 13557778
Patent Status: 1

Claim One:
1. A system to reuse a binary bitmap generated for a continuous tone image appearing multiple times in a print job, the system comprising: a storage device that stores the binary bitmap for a first appearance of the continuous tone image, wherein the first appearance of the continuous tone image was previously rasterized by an interpreter to generate a non-binary bitmap, and the non-binary bitmap was screened by the interpreter using threshold matrices that are overlaid on the non-binary bitmap to reduce a resolution of pixel values in the non-binary bitmap down to binary values to generate the binary bitmap; wherein the threshold matrices include a repeating pattern of threshold values that make the binary bitmap position-dependent; and an image controller that determines an offset of the binary bitmap into a sheetside, and calculates position values for the binary bitmap based on the offset of the binary bitmap and parameters of the threshold matrices to indicate where the binary bitmap is reusable; the image controller receives a communication from the interpreter regarding a next appearance of the continuous tone image in the print job at a different position into the sheetside while the interpreter is rasterizing the print job; the image controller determines an offset of the next appearance of the continuous tone image into the sheetside, calculates position values for the next appearance of the continuous tone image based on the offset of the next appearance of the continuous tone image and the parameters of the threshold matrices, determines if the position values for the next appearance of the continuous tone image correspond with the position values for the binary bitmap stored in the storage device, and verifies that the binary bitmap is reusable for the next appearance of the continuous tone image if the position values correspond; the image controller instructs the interpreter to reuse the binary bitmap at the different position into the sheetside instead of rasterizing the next appearance of the continuous tone image if the binary bitmap is verified as reusable.