| 摘要 |
<p>An image forming apparatus and method outputs an image in a pure monochromatic colour as opposed to forming the monochromatic colour from a combination of colours. The image forming apparatus includes a controller to receive image data represented by a combination of red, green and blue data, among others, to determine whether the received image data are image data corresponding to a monochromatic colour, such as black, a converter to convert the image data into cyan, magenta, yellow, and black data, among other colour schemes, when the image data are image data corresponding to the monochromatic colour, a halftoning processor to compare colour information items of the converted cyan, magenta, yellow, and black data with colour information items in previously established halftone tables to output and store resultant values of cyan, magenta, yellow, and black, and an extractor to extract a resultant value of black, when the monochromatic colour is black, from among the stored resultant values of cyan, magenta, yellow, and black.</p> |
