Image signal binary encoder

Details Image signal binary encoder Image signal binary encoder

1988-02-17

1990-11-20

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 52, 358456, 358457, G06K 900

Patent

active

049725025

ABSTRACT:
An image signal binary encoder for converting analog image signals into binary output signals, including an arithmetic circuit which calculates, when a predetermined area of a matrix having m rows and n columns and containing mxn points P.sub.a, b (a=i,---, i-m+1; b=j,---, j-n+1) is given so as to be enclosed by the points P.sub.i, j, P.sub.i-m+1, j, P.sub.i, j-n+1 and P.sub.i-m+1, j-n+1 where characters i, j, m and n denote natural numbers, respectively, an average of densities of the mxn points P.sub.a, b by calculating, on the supposition that characters x.sub.a, b denote the densities of the mxn points P.sub.a, b, respectively, a sum s.sub.i, j of n values from x.sub.i, j to x.sub.i, j-n+1 by the equation: s.sub.i, j =s.sub.i, j-1 +x.sub.i, j -x.sub.i, j-n and calculting a sum S.sub.i, j of m values from s.sub.i, j to s.sub.i-m+1, j by the equation: S.sub. i, j =S.sub.i-1, j +s.sub.i, j -s.sub.i-m, j and calculating an average A.sub.i, j of mxn values from x.sub.i, j to x.sub.i-m+1, j-n+1 by the equation: A.sub.i, j =S.sub.i, j /(mxn) such that the analog image signals are converted into the binary output signals by using the average A.sub.i, j obtained by the arithmetic circuit.

REFERENCES:
patent: 4542527 (1985-09-01), Tsunekawa
patent: 4551768 (1985-11-01), Tsuchiya et al.
patent: 4667237 (1987-05-01), Yokomizo
patent: 4710822 (1987-12-01), Matsunawa
patent: 4723173 (1988-02-01), Tanoika
patent: 4723298 (1988-02-01), Schiller
patent: 4729035 (1988-03-01), Tanoika
patent: 4734784 (1988-03-01), Tanaka
patent: 4831658 (1989-05-01), Umeda et al.
patent: 4853792 (1989-08-01), Katsuta et al.

Affiliated with

Also associated with

Rating

Image signal binary encoder 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 binary encoder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image signal binary encoder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-460667