| 摘要 |
A printer driver capable of converting color data into monochrome image data to be outputted to a high-quality monochrome image printer. Source data colors (red, green, blue) are converted by a printer driver to gray values using equation (1). A palette number which is closest to the obtained gray value is transferred to the system I/F. The system performs rendering by filling the rendering area with the palette number. When the data stored in the 8 bit-per-pixel (BPP) memory space in rendering process is transferred to the driver I/F, the printer driver performs binarization on the black value (8 bits) of the palette number.
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