| 摘要 |
PURPOSE: To obtain an image whose noise is reduced at a high speed while minimizing blurring and uneven density of an edge of an image with low S/N. CONSTITUTION: A processing consisting of a step 101 calculating a magnitude E(i) (i:1 to n) of a density change in each primary direction, a step 102 deciding a direction with a minimum magnitude of the density change in the primary direction calculated by the step 101 in each picture element, and a step 103 conducting smoothing processing by using the LLSE(Linear Least Squares Error) method in the primary direction detected in the step 102 for each picture element is applied to each picture element of a received image to obtain an image whose noise is reduced. Since the component of the image in the local structure in the primary direction is detected and the smoothing processing is applied to the image in the direction by the LLSE method, noise is reduced effectively at a high speed while minimizing a fog of the edge and uneven density. |
