Patent Document ID: 20110242418
Application ID: 13053573
Patent Status: 0

Claim One:
1. An image processing apparatus comprising: a min-max pixel difference value computing unit configured to compute a min-max pixel difference value defined as the difference between the maximum pixel value and the minimum pixel value in an image portion for feature value computation that includes a target pixel selected from among pixels forming an input image and a given number of neighbor pixels; a maximum adjacent pixel difference value computing unit configured to compute a maximum adjacent pixel difference value defined as the maximum value among the difference values between adjacent pixels in the image portion for feature value computation; an image change feature value computing unit configured to compute an image change feature value corresponding to the suddenness of image change in the image portion for feature value computation on the basis of the min-max pixel difference value and the maximum adjacent pixel difference value; a filter coefficient computing unit configured to compute filter coefficients on the basis of the image change feature value; and a sharpen filter configured to accept, as input, pixels forming an image portion for filter processing that includes the same target pixel as a given image portion for feature value computation and a given number of neighbor pixels, and compute an output pixel value for the target pixel in the image portion for filter processing by using filter coefficients corresponding to the given image portion for feature value computation.