Patent ID: 7944588
Filing Date: 2011-05-17
Classification: G06K

Abstract:
1. An image correction processing apparatus comprising: a computer including a central processing unit having connected thereto: an area setting unit adapted to set on a target image to be processed an area comprising a plurality of pixels including an interest pixel; a changing times calculating unit adapted to calculate a number of changes value that expresses a frequency of occurrence of changes in luminance values of pixels in said area; a changing amount calculating unit adapted to detect, from the pixels in said area, an edge direction of the interest pixel, and to calculate a changing amount value that expresses a magnitude of changes in luminance values of the pixels in said area in the edge direction; a changing acceleration calculating unit adapted to calculate a changing acceleration value that expresses an acceleration of changes in luminance values of the pixels in said area in the edge direction; a first setting unit adapted to set, in accordance with the calculated number of changes value and the calculated changing amount value, a first correction strength for enhancing the edge for at least the interest pixel in said area; a selecting unit adapted to select, on the line extending from the pixel of interest in the edge direction, a replacement pixel for enhancing the edge of the interest pixel whereas the selection is based on the acceleration of changes in luminance values in the edge direction; a second setting unit adapted to set, in accordance with the calculated number of changes value, the calculated changing amount value, and the calculated changing acceleration value, a second correction strength for correcting the selected replacement pixel; a first correction unit adapted to correct a luminance value of the interest pixel in accordance with the first correction strength; and a second correction unit adapted to correct a luminance value of the selected replacement pixel in accordance with the second correction strength.