Patent ID: 8773594
Filing Date: 2014-07-08
Classification: G06T,H04N

Abstract:
1. A signal processing device for subjecting an input signal indicative of an image to a process of sharpening the image and outputting a signal indicative of the sharpened image, comprising: high frequency component removing means for removing, from the input signal, a high frequency component out of frequency components in directions other than a horizontal direction and a vertical direction of the image indicated by the input signal, so as to generate an obliquely reduced signal; and sharpening means for receiving the obliquely reduced signal and outputting a sharpened signal obtained by sharpening the obliquely reduced signal, the sharpening means including: the horizontal sharpening means and the vertical sharpening means being cascade-connected with each other, the obliquely reduced signal being inputted to the horizontal sharpening means or the vertical sharpening means at an upper stage of the cascade-connection, the sharpening means outputting, as the sharpened signal, a signal outputted from the horizontal sharpening means or the vertical sharpening means at a lower stage of the cascade-connection, the horizontal sharpening means including: the vertical sharpening means including: