Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1991-09-03
1993-05-18
Goldstein, Herbert
Facsimile and static presentation processing
Facsimile
Recording apparatus
358227, H04N 5232
Patent
active
052125572
ABSTRACT:
An automatic focusing imaging device basically comprises an imaging element for applying photoelectric conversion to an image pick-up light from an object formed by a lens system, an extraction circuit for extracting, as an analog signal, a high frequency band component of the video signal, an analog/digital (A/D) conversion circuit for converting the extracted analog signal to a digital signal, a calculation circuit responsive to the digital signal to calculate in advance an in-focus position in the lens system and the imaging element so that the high frequency band component has a maximum level to generate a control signal, a drive mechanism for moving the lens system and/or the imaging element by the control signal, and a non-linear conversion circuit provided at the preceding stage of the A/D conversion circuit and for correcting in advance deterioration of quantization resolution of the high frequency band component in calculation of the in-focus position.
REFERENCES:
patent: 4762986 (1988-08-01), Suda et al.
patent: 4804831 (1989-02-01), Baba et al.
patent: 4969044 (1990-11-01), Hijikata et al.
patent: 5005086 (1991-04-01), Iwamoto et al.
patent: 5055932 (1991-10-01), Hijikata et al.
Abstracts of Japan, vol. 14, No. 194 (E-0919), Apr. 20, 1990; & JP-A-2 039 779 (Canon Inc.) 08-02-1990.
Abstracts of Japan, vol. 15, No. 246 (E-1081), Jun. 24, 1991; & JP-A-3 077 481 (Canon Inc.) 03-04-1991.
Abstracts of Japan, vol. 12, No. 281 (E-641), Aug. 2, 1988; & JP-A-63 059 274 (Victor Co. of Japan) 15-03-1988.
Goldstein Herbert
Ho Tuan V.
Victor Company of Japan Ltd.
LandOfFree
Imaging device capable of carrying out automatic focusing with s does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Imaging device capable of carrying out automatic focusing with s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Imaging device capable of carrying out automatic focusing with s will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-807739