Oct. 22, 1991 [JP] Japan 3-273843
Apr. 2, 1992 [JP] Japan 4-80654
[51] IntCI.6 H04N7/32
[52] U.S. CI 348/412; 348/413; 348/420
[58] Field of Search 358/136, 133;
348/420, 421, 411, 412, 413, 414, 415, 416; H04N 7/137, 7/13
[56] References Cited
U.S. PATENT DOCUMENTS
4,437,119 3/1984 Matsumoto et al 358/136
4,546,386 10/1985 Matsumoto et al 358/136
4,571,618 2/1986 Hatori et al 358/136
4,675,733 6/1987 Tanimoto 358/133
4,691,329 9/1987 Juri et al 375/122
4,703,351 10/1987 Kondo 358/133
4,772,947 9/1988 Kono 358/133
4,783,698 11/1988 Harney 358/133
4,849,812 7/1989 Borgers 358/133
4,931,869 6/1990 Amoretal 358/133
5,045,938 9/1991 Sugiyama 358/133
5,046,119 9/1991 Hoffertetal 358/133
5,068,724 11/1991 Krauseetal 358/133
5,091,782 2/1992 Krauseetal 358/135
5,093,720 3/1992 Krause et al 358/133
5,157,742 10/1992 Nuhara 358/136
5,193,004 3/1993 Wang et al 348/420
5,274,442 12/1993 Murakami et al 348/405
5,347,309 9/1994 Takahashi 348/420
FOREIGN PATENT DOCUMENTS
