Patent ID: 8537179
Filing Date: 2013-09-17
Classification: G06T,H04N

Abstract:
1. An image processing apparatus, to which an enlarged image obtained by enlarging an original image is input as an input image, said image processing apparatus comprising: a bandpass filter that generates a first intermediate image obtained by extracting a component of the input image in a particular frequency band by removing a low-frequency component and a high-frequency component from the input image; a non-linear processor configured to generate a non-linearly processed image by amplifying the pixel values in the first intermediate image by an amplification factor determined for each pixel, the non-linear processor including zero-crossing decision logic that identifies a point where a pixel value in the first intermediate image changes from positive to negative or from negative to positive as a zero-crossing point, and an amplifier that amplifies each pixel preceding and following each position which has been identified to be a zero-crossing point by a factor greater than 1 and amplifies other pixels by a factor equal to 1 to generate a non-linearly processed image; a first noise filter that suppresses low-level noise included in the second intermediate image; and an adder configured to add, to the input image, the image output by the first noise filter, wherein said bandpass filter includes