Image processing apparatus and method for generating bitmap data and attribute information from a raster data
US7697168B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2006 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Nov 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to improve print image quality, attribute information is generated for each pixel of a bitmap image generated according to a drawing command, and the bitmap image and attribute information are written in a memory. However, when this is done, data amount to be written in the memory increases, and the rasterize processing speed lowers. Hence, a display list is generated by interpreting PDL data, a bitmap image and attribute information of each pixel are rasterized based on the display list, and the bitmap image and attribute information are written in the memory. In this case, a black attribute is written in attribute information of an object filled with black, and the color value of that object is not written in the bitmap image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.