摘要 |
PROBLEM TO BE SOLVED: To provide an image processing apparatus which can efficiently reduce the occurrence of moire in a dot image. SOLUTION: The image processing apparatus includes: a spatial filtering unit which applies spatial filtering to input image data to generate filtered image data such that the spatial filtering provides a broader dynamic range for outputs than for inputs; and a high-resolution conversion unit which interpolates the filtered image data in a first direction by an average of values of two pixels adjacent in the first direction, in a second direction perpendicular to the first direction by an average of values of two pixels adjacent in the second direction, and in a direction diagonal to the first and second directions by an average of four pixels surrounding a pixel of interest, thereby converting the filtered image data into high-resolution image data. COPYRIGHT: (C)2003,JPO |