Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1992-01-21
1993-03-30
Coles, Sr., Edward L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 37, H04N 978
Patent
active
051988917
ABSTRACT:
A filter for separating brightness signal and color signal from a composite color signal of NTSC type or PAL type, includes a horizontal color signal extracting filter, a vertical color signal extracting filter, a horizontal/vertical color signal extracting filter, a switching circuit, and an image correlation judging circuit. The image correlation judging circuit makes the switching circuit select: the color signal extracted by the horizontal color signal extracting filter when the horizontal correlation is judged to be stronger than the sampling value at the target sampling point; the color signal extracted by the vertical color signal extracting filter when the vertical correlation is judged to be stronger than the same; and the color signal extracted by the horizontal/vertical color signal extracting filter when neither of them is judged to be stronger than the same. The result is that mutual leakage of the brightness signal and the color signal at the area of intensive change into the another's channel can be reduced, thereby avoiding dot jamming and deterioration of image quality. The image correlation judging circuit judges the strength of correlation based on the non-correlative energy.
REFERENCES:
patent: 4707132 (1987-11-01), Matono et al.
patent: 4754322 (1988-06-01), Okuda et al.
patent: 4789890 (1988-12-01), Ito et al.
patent: 4954885 (1990-09-01), Ito et al.
patent: 4994906 (1991-02-01), Moriwake
NTSC Y/C Separation and Enhancement Technique with Two Dimensional Adaptive Features to M. Itoga et al, IEEE Transactions on Consumer Electronics, vol. 34, No. 1, Feb. 1988.
John P. Rossi, "Digital TV Comb Filter With Adaptive Features", IERE Conf. Proc. pp. 267-282 (1976).
John P. Rossi, "Digital Television Image Enhancement" J. Smpte, vol. 84, Jul. (1985).
Coles Sr. Edward L.
Mitsubishi Denki & Kabushiki Kaisha
Vu Kim Yen
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