Patent ID: 9324135
Filing Date: 2016-04-26
CPC Classification: G06T,H04N

Claim Text:
1. An image processing system comprising: a brightness gradient calculating unit which calculates a brightness gradient of each pixel in a local area clipped from a processing target image; a principal component analyzing unit which analyzes a principal component of the brightness gradient of each pixel in the local area, and calculates a feature amount which represents a distribution of brightness gradients; a target pixel deciding unit which, based on a brightness gradient of a center pixel of the local area and the feature amount calculated by the principal component analyzing unit, decides whether or not the center pixel is a jaggy removal target pixel; a target pixel detail deciding unit which transforms each pixel value of each pixel, which is sampled based on a pixel decided as the jaggy removal target pixel by the target pixel deciding unit, into a frequency domain, and decides whether or not intensity equal to or more than a threshold can be obtained at an arbitrary frequency; a base filter computing unit which, when the center pixel of the local area is decided to be the jaggy removal target pixel, applies a plurality of types of predetermined base filters to the local area; a weight calculating unit which calculates a weight with respect to the plurality of types of base filters based on the feature amount calculated by the principal component analyzing unit; and a filtering result weight computing unit which, based on a result that the plurality of types of base filters is applied to the local area and the weight with respect to the plurality of types of base filters, determines a pixel value of a pixel which is included in a corrected image created as an image by correcting a processing target image and which corresponds to the center pixel of the local area.