DARK TO LIGHT WATERMARK WITHOUT SPECIAL MATERIALS

摘要

Methods and systems rasterize a document to produce a bitmap having first pixels of a first color as background uniformly located across a watermark region and second pixels of a second color located in a pattern forming foreground items within the watermark region. The rasterization causes the first pixels to deposit a first marking material (forming the first color) to a first height on the print media, and the rasterization causes the second pixels to deposit a second marking material (forming the second color) to a second height (different from the first height) on the print media. In the printed document, by having the first color be different from the second color and the second height be different from the first height, this causes the relative darkness between the background and the foreground items to reverse when the printed document is viewed from different angles (relative to a light source).

主权项

1. A method comprising:
receiving a document to be printed into a computerized device, said document including a designation of a watermark region within said document, said designation of said watermark identifying a first color and a second color different from said first color for use in said watermark region; automatically, using said computerized device, processing said document into a print ready format document to produce said first color as background uniformly located across said watermark region and said second color located in a pattern forming foreground items within said watermark region, said first color being deposited to a first height on a print media, and said second color being deposited to a second height on said print media different from said first height in said print ready format document; and printing said print ready format document to produce a printed document, using a printing device operatively connected to said computerized device.