Television – Image signal processing circuitry specific to television – Combined noise reduction and transition sharpening
Patent
1995-09-29
1997-06-03
Hsia, Sherrie
Television
Image signal processing circuitry specific to television
Combined noise reduction and transition sharpening
348607, 348624, H04N 5213
Patent
active
056359900
ABSTRACT:
An apparatus for cancelling noise and improving details of color components of an image by processing a color component value corresponding to a respective pixel, including a high-frequency component detector for individually detecting a high-frequency color component value contained in the color component value corresponding to the respective pixel, a noise detector for receiving the high-frequency color component value detected by the high-frequency component detector, judging whether a noise component is contained in a corresponding pixel and outputting a first binary signal indicative of a judgement result, a storage unit for outputting a value designated by the detected high-frequency color component value and the first binary signal among detail improved values and noise cancelled values both of which are pre-stored therein, and an adder for individually adding the value output from the storage unit and the corresponding color component value. Accordingly, detail improvement and noise cancelling is accomplished for each pixel, thereby enhancing resolution of an image displayed on a screen.
REFERENCES:
patent: 4991021 (1991-02-01), Nikoh
patent: 5400151 (1995-03-01), Okada
Hsia Sherrie
Samsung Electronics Co,. Ltd.
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