Image processing apparatus and image forming apparatus and image processing method and image forming method

摘要

A trapping means judges that the gradated region is dark if compared with the uniform region and expands the uniform region to cause colors to overlap when the density average value Da of the gradated region is greater than the density value Du of the uniform region but judges that the gradated region is light if compared with the uniform region and expands the gradated region when the density average value Da of the gradated region is smaller than the density value Du of the uniform region.