63fb46d6_bster_US___Patent_applications__Description
[Patent application number] 20140347700 [Published] 11-27-2014 [Description] 
COLOR REGISTRATION ERROR COMPENSATION IN COLOR PRINTING - A multicolor image can include multiple overlaid items including a black region covering a color region. Raster image processing adds the color data to color pixels of the raster data print page uniformly across the area of the raster data print page that corresponds to the color region of the multicolor image, and adds the black data to over-print pixels (where the black region covers the color region in the multicolor image). Such over-print pixels include both the color data and the black data. The color data (but not the black data) is removed from the over-print pixels that are positioned a preset pixel distance from non-black color pixels. The raster data page is output from the processor device to a printing engine, and the printing device prints the raster data page on print media to produce a physically printed reproduction of the multicolor image.
Xing Li, Webster US - Patent applications