Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1986-09-25
1989-09-26
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358494, 382 48, H04M 140
Patent
active
048705004
ABSTRACT:
An image signal processing apparatus includes a contact type line image sensor as an image reading unit, an original table, an image processing circuit, a trimming circuit, and an original recognition circuit including D flip-flops and white detection circuits. The contact type line image sensor reads an image signal including original and nonoriginal area images. The white detection circuits in the original recognition circuit detect the original area for each line or every plurality of lines on the bases of the image signal input at the image sensor. The D flip-flops in the original recognition circuit delay the image signal input at the image sensor. The trimming circuit extracts an image signal corresponding to the original area from an image signal delayed by the flip-flops, on the basis of a detection result of the white detection circuits.
REFERENCES:
patent: 4325086 (1982-04-01), Sato et al.
patent: 4439790 (1984-03-01), Yoshida
patent: 4570181 (1986-02-01), Yamamura
patent: 4645336 (1987-02-01), Muehlenbruch
patent: 4672461 (1987-06-01), Yoshida
patent: 4686577 (1987-08-01), Arimoto
patent: 4737856 (1988-04-01), Shimizu
IBM Technical Disclosure Bulletin, vol. 27, No. 4A, Sep. 1984, titled, "Image Data Compression Method" by H. Asano and Y. Shimizu.
Canon Kabushiki Kaisha
Coles Sr. Edward L.
LandOfFree
Image signal processing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image signal processing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image signal processing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-191234