| US 7,602,967 B2 | ||
| Method of improving image quality | ||
| Sung-hyun Lim, Seoul (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd, Suwon-Si (Korea, Republic of) | ||
| Filed on Jun. 28, 2004, as Appl. No. 10/877,820. | ||
| Claims priority of application No. 10-2003-0042937 (KR), filed on Jun. 28, 2003. | ||
| Prior Publication US 2005/0013502 A1, Jan. 20, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06K 9/00 (2006.01) | ||
| U.S. Cl. 382—162 [382/167; 382/254] | 30 Claims |
| 1. A method of improving image quality of a reproduced image, the method comprising:
converting red, green, and blue color data of a subject pixel into color data having brightness and chroma components;
identifying the subject pixel as a background pixel, a picture pixel, or a text pixel according to the brightness and the
chroma components;
storing history information of the subject pixel, wherein the history information comprises the number of continued background
pixels or continued picture pixels before the subject pixel;
detecting features of the subject pixel according to the history information;
labeling the subject pixel to be included in one of a text area, a background area, and a picture area according to a state
of a previously labeled adjacent pixel and the detected features of the subject pixel; and
using at least one processor device for processing the subject pixel according to the area to which the subject pixel belongs.
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