| 摘要 |
An image forming method which examines validity of an output object using an ROP, for example, and determines whether the output object is printed in a color mode or in a mono mode, is provided. The method includes detecting an output object having a color value from among output objects constituting a mono page, examining the validity of the detected output object, and outputting the detected output object as a mono object if the output object is determined not to be valid. Accordingly, if a mono image having an RGB value is recognized as a color object but is data not to be output on paper or media, the image is recognized as data which are not necessary to be output using color toner, so that only black toner is used. Accordingly, the printing rate increases, and efficiency of processing a printing is enhanced.
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