U S . Patent Jul . 6 , 2004 Sheet 2 of 8 US 6 , 760 , 487 B 1 LPFj 1 0 27 t
نویسنده
چکیده
The invention presents The Estimated Spectrum Adaptive Postfilter (ESAP) and the Iterative Prepost Filter (IPF) algorithms. These algorithms model a number of imageadaptive post-filtering and pre-post filtering methods. They are designed to minimize Discrete Cosine Transform (DCT) blocking distortion caused when images are highly compressed with the Joint Photographic Expert Group (JPEG) standard. The ESAP and the IPF techniques of the present invention minimize the mean square error (MSE) to improve the objective and subjective quality of low-bit-rate JPEG gray-scale images while simultaneously enhancing perceptual visual quality with respect to baseline JPEG images.
منابع مشابه
U S . Patent Apr . 27 , 2004 I Sheet 1 of 4 1 US 6 , 728 , 666 B 1 7
5,258,947 A * 1111993 Sourgen ...................... 365196 5,677,691 A * 1011997 Hosticka et al. .............. 326139 5,705,938 A * 111998 Kean ........................... 326139 5,959,871 A * 911999 Pierzchala et al. .......... 3271565 5,970,487 A * 1011999 Shackleford et al. ......... 706113 6,360,191 B1 * 312002 Koza et al. ................... 703114 6,363,517 B1 * 312002 Levi et al. ........
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4,560,665 A 4,943,522 A 4,965,211 A 5,124,268 A 5,792,330 A 5,830,769 A 5,876,960 A 6,136,549 A 6,242,268 B1 6,569,630 B1 6,599,715 B1 2002/0135772 A1 2003/0064427 A1 2003/0138876 A1 2004/0014154 A1 12/ 1985 7/1990 10/1990 6/1992 8/1998 11/1998 3/1999 10/2000 6/200 1 5/2003 7/2003 9/2002 4/2003 7/2003 1/2004 Nakae et al. ............... 436/172 Eisinger et al. ............ 435/7.25 Wieder et al...
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(51) Int. C1.7 ................................................ G05B 15/00 (52) U.S. C1. ....................... 700/260; 7001245; 7001248; 7001257; 7001262; 7001263; 901127; 901128; 901130; 901134; 901136; 6001595; 6011130; 341120; 3451157; 3451161 (58) Field of Search ................................. 7001245, 248, 7001257, 260, 262, 263; 901127, 28, 30, 34, 36; 6001595; 6061130; 341120; 3451...
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6,980,697 B1 * 12/2005 Basso et al .................... 382/274 7,171,023 B2 1/2007 Kim et al. 7,177,446 B2 * 2/2007 Magarey ....................... 382/103 7,403,652 B2 7/2008 Boncyk et al. 7,940,956 B2 * 5/2011 Kinoshita et al .............. 382/103 7,957,557 B2 * 6/2011 Otsu et al ...................... 382/103 7,996,409 B2 * 8/2011 Hsu et al ....................... 707/748 8,170,280 B2 * 5/...
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(51) Int. Cl. B03C1102 (2006.01) C12M 1/00 (2006.01) (52) U.S. Cl. USPC ................... 210/222; 252/62.51 R; 422/68.1; 422/502; 422/504; 422/527; 435/287.2; 435/308.1; 436/526; 436/806 (58) Field of Classification Search USPC ........... 210/222; 252/62.51 R; 422/68.1, 502, 422/504, 527; 435/287.2, 308.1; 436/526, 436/806 See application file for complete search history. (1o) Patent No.: U...
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