The image processing device and method of the present invention prevent a problem such as misregistration and a phenomenon that an edge pales, and enable high speed output in a color printer and a color copying machine. The color materials of Y, M, C of a predetermined amount are output onto a black object regardless of peripheral pixel values and thereby a phenomenon that an edge pales is prevented. In the edge of the black object, trapping processing according to peripheral pixel values is executed and a problem due to misregistration is made inconspicuous.