Patent ID: 9374508
Filing Date: 2016-06-21
CPC Classification: G06T,H04N

Claim Text:
1. An image processing apparatus for sharpening an input image by generating a frequency component higher than a frequency component contained in an input image signal representing the input image, the image processing apparatus comprising: a vertical filter configured to remove, at least from a high frequency portion in a horizontal direction contained in the input image signal, a high frequency portion of a frequency component in a vertical direction of the input image signal; a horizontal sharpening processing unit configured to generate a harmonic in the horizontal direction containing a frequency component higher than the frequency component in the horizontal direction contained in the input image signal; a horizontal filter configured to remove, at least from a high frequency portion in the vertical direction contained in the input image signal, a high frequency portion of a frequency component in the horizontal direction of the input image signal; and a vertical sharpening processing unit configured to generate a harmonic in the vertical direction containing a frequency component higher than the frequency component in the vertical direction contained in the input image signal, wherein a horizontal direction processing unit in which the vertical filter is disposed at a preceding stage of the horizontal sharpening processing unit and a vertical direction processing unit in which the horizontal filter is disposed at a preceding stage of the vertical sharpening processing unit are connected in parallel, and an amplifier is connected to a subsequent stage of any one of the horizontal direction processing unit and the vertical direction processing unit and also to a preceding stage of the other.