1. An apparatus comprising: initial color image inputting means for inputting an initial color image data to be processed; data dividing means responsive to the initial color image data for dividing the initial color image data into pieces of mono-color image data, a number of the pieces of mono-color image data being equal to or larger than a number of the color components; data processing means for effecting a predetermined processing on at least some of the pieces of mono-color image data to provide secondary image data, the predetermining processing including converting the at least some of the pieces of mono-color image data to YUV component data without increasing a number of processed data points via interpolation; and secondary image data outputting means for outputting the secondary image data.