Edge correction method and apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorKyung-sun Min
Life of this patent
Estimating the term…
Abstract
An edge correction apparatus and a method of performing an effective edge correction of an image signal in horizontal, vertical and diagonal directions include generating a two-dimensional (2D) second differential signal from the image signal, generating first differential signals in the horizontal, vertical and diagonal directions from the image signal, selecting one of the first differential signals, combining the selected one and the 2D second differential signal, and correcting the edge of the image signal using the combined signal. Therefore, it is possible to effectively correct edges of the image signal in the horizontal, vertical and diagonal directions.
Claims27
A method of correcting an edge of an image signal, the method comprising:
- generating a two-dimensional (2D) second differential signal from the image signal;
- generating first differential signals in first, second, and third directions from the image signal, the third direction disposed between the first and second directions;
- selecting one of the first differential signals;
- combining the selected first differential signal and the 2D second differential signal to generate a combined signal;
- and
- correcting the edge of the image signal using the combined signal.
An apparatus for correcting an edge of an image signal, the apparatus comprising:
- a 2D second differentiator generating a 2D second differential signal from the image signal;
- first differentiators generating first differential signals from the image signal in first, second, third, and fourth directions, the third and fourth directions disposed between the first and second directions;
- a selector selecting one of the first differential signals;
- a multiplier multiplying the selected first differential signal of the selector by the 2D second differential signal of the 2D second differentiator to generate a corrected signal;
- a delayer delaying the image signal;
- and
- an adder adding the delayed image signal of the delayer and the corrected signal of the multiplier.
An apparatus for correcting an edge of an image signal, the apparatus comprising:
- a first differentiator unit generating from the image signal first differential signals in first, second, and third directions with respect to the edge of the image signal, the third direction disposed between the first and second directions;
- a second differentiator unit generating from the image signal a second differential signal having an intensity of the edge of the image signal;
- a selector generating a selection signal in response to the first differential signals;
- a multiplier multiplying the selection signal of the selector by the second differential signal of the second differentiator to generate a corrected signal;
- and
- an adder adding the image signal and the corrected signal of the multiplier.
Dependencies are inferred from the claim text.