IMAGE OUTPUT DEVICE AND IMAGE CONTROL METHOD FOR SMOOTHING IMAGE OR INCREASING IMAGE RESOLUTION BY USE OF SAME

The present invention comprises the steps of one-dimensionally converting, into a vector, a dot distribution around an attentional pixel in a K.times.L coordinate (K and L=odd numbers, M=L or K.noteq.L) adjacent to the attentional pixel, specifically, in a 3.times.3 coordinate, 3.times.5 (5.times.3) coordinate or 3.times.7 (7.times.3) coordinate on the basis of rasterized data of the coordinate; and then smoothing the image or heightening an image density by correcting a location error of the attentional pixel on the basis of the vector information and the kind of attentional pixel (a dot or a blank). Thus, according to the present invention, the image patterns can be smoothed and the image resolution can be increased in a pseudo state with ease and high precision without complicating a circuit constitution by a simple judgement operation.