Detection system

Details Detection system Detection system

1975-01-22

1976-10-19

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

178 5, 307235A, 328135, G06K 900

Patent

active

039874133

ABSTRACT:
A character segment detection system adapted for use with conventional scanning apparatus comprising translating apparatus disposed to illuminate an area of a page, detection means disposed for sensing the level of reflected light within a predetermined aperture from the paper and for producing an electrical signal indicative thereof, peak detector means connected to the detection means for producing the output signal indicative of the peak of the electrical signal, differentiator means connected to the detection means for producing an output signal indicative of the first derivative of the electrical signal, rectifying means connected to receive the differentiator means output signal for producing an output signal of only one polarity indicative thereof and comparator means connected to receive the electrical signal and the peak detector means and rectifier means output signals for producing an output signal when the sum of the electrical signal and and the peak detector means signal is greater than the differentiator means output signal.

REFERENCES:
patent: 3004224 (1961-10-01), Yando
patent: 3187305 (1965-06-01), Chiang
patent: 3202042 (1965-08-01), Jamieson et al.
patent: 3464062 (1969-08-01), Jensen
patent: 3525869 (1970-08-01), Gubisch
patent: 3599148 (1971-08-01), Stern
patent: 3660601 (1972-05-01), Dobson
patent: 3879707 (1975-04-01), Rohrer

Affiliated with

Also associated with

Rating

Detection system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-105738