Patent ID: 8774548
Filing Date: 2014-07-08
Classification: G06T

Abstract:
1. An image processing apparatus that performs an edge enhancement process on an inputted image data, the apparatus comprising: an edge enhancement data calculation unit that performs second-order differentiation on the image data, for each line, and outputs the result as an edge enhancement data; a first difference value calculation unit that selects each pixel in the image data as a pixel of interest and calculates a first difference value in a form of an absolute value of a difference between pixel values of two first pixels that flank the pixel of interest on a same line as that of the pixel of interest; a second difference value calculation unit that calculates a second difference value in a form of an absolute value of a difference between pixel values of two second pixels that are respectively positioned on opposite sides to a side of the pixel of interest of the two first pixels, on a same line as that of the pixel of interest; a multiplication unit that multiplies the second difference value by a first value which is smaller than 1; an edge adjustment coefficient calculation unit that subtracts the multiplication result of the multiplication unit from the first difference value, limits a lower-limit value of the result to 0, and outputs the result as an edge adjustment coefficient; a correction unit that corrects the edge enhancement data through multiplication by the edge adjustment coefficient; and an addition unit that adds the corrected edge enhancement data to the image data.