0 dpi; [0093]FIG. 61 is a diagram of a smoothing filter for smoothing input data of 400 dpi to 200 dpi; [0094]FIG. 62 is a diagram of a smoothing filter for smoothing input data of 400 dpi to 100 dpi; [0095]FIGS. 63A and 63B are diagrams for explaining a slight extension of chromatic data outside a character and deletion of such extension; [0096]FIGS. 64A and 64B are diagrams of examples of images