US4473847A
Expired / Lapsed
US
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Binary coding system
Assignee: Fujifilm Business Innovation Corp
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Filing: 1982-07-23
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Granted: 1984-09-25
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Expires: 2002-07-23
Abstract
Abstract A binary-coding device for a raster picture scanner is herein disclosed in which the miscoding produced by various states in adjacent picture elements is eliminated. The device comprises a comparator which compares the analog picture signal of the scanner with a reference voltage. A "black-or-white" state of a first picture element adjacent to the n th , i th picture element to be read (the first picture element being on the i th subscanning line) is stored in an addressable RAM, and the state of a second picture element adjacent to the n th , i th picture element to be read (the second picture element being on the n th main scanning line) is inputted to a flipflop. The states of the two adjacent picture elements are compared in a plurality of dissimilar logic gates which output a signal indicative of the reference voltage which should be used in order to maximize accurate coding. These signals are applied to a plurality of switches which output the desired reference voltage. In a second embodiment, a multiplexer controls the switching between a plurality of comparators, each of which has a different reference voltage.
Inventors
- 👤 Masami Kurata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:20
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/403
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
208 words
A binary-coding system, comprising: an image sensor for sensing the state of a n th , i th picture element within a plurality of picture elements by scanning a n th line of said picture elements in a main scanning direction and producing an analog picture signal; a comparator for comparing said analog picture signal with a reference voltage signal and outputting a binary-coded output signal indicative of said state of said n th , i th picture element; first storage means receiving the output of said comparator for storing a first binary-coded output signal indicative of a state of a first discrete picture element adjacent to said n th , i th picture element; second storage means receiving the output of said comparator for storing a second binary-coded output signal indicative of a state of a second discrete picture element adjacent to said n th , i th picture element; logic means for comparing said first binary-coded signal of said first storage means with said second binary-coded signal of said second storage means and producing at least one logic means output signal; and reference voltage setting means for setting the reference voltage signal of said comparator in accordance with said at least one logic means output signal.
Claim 2
Dependent Claim
208 words
A binary-coding system, comprising: an image sensor for sensing the state of a n th , i th picture element within a plurality of picture elements by scanning a n th line of said picture elements in a main scanning direction and producing an analog picture signal; a comparator for comparing said analog picture signal with a reference voltage signal and outputting a binary-coded output signal indicative of said state of said n th , i th picture element; first storage means receiving the output of said comparator for storing a first binary-coded output signal indicative of a state of a first discrete picture element adjacent to said n th , i th picture element; second storage means receiving the output of said comparator for storing a second binary-coded output signal indicative of a state of a second discrete picture element adjacent to said n th , i th picture element; logic means for comparing said first binary-coded signal of said first storage means with said second binary-coded signal of said second storage means and producing at least one logic means output signal; and reference voltage setting means for setting the reference voltage signal of said comparator in accordance with said at least one logic means output signal.
Claim 3
Dependent Claim
29 words
The binary-coding system as in claim 1, wherein said logic means comprises a plurality of discrete dissimilar logic gates, each of which outputs a discrete logic gate output signal.
Claim 4
Dependent Claim
53 words
The binary-coding system as in claim 2, wherein said reference voltage setting means comprises a plurality of voltage-providing switches, each of which provides one of a plurality of dissimilar discrete voltages to said comparator, one of each of said switches being controlled by one of each of said discrete logic gate output signals.
Claim 5
Dependent Claim
34 words
The binary-coding system as in claim 1, wherein said reference voltage setting means comprises a plurality of voltage-providing switches, each of which provides one of a plurality of dissimilar discrete voltages to said comparator.
Claim 6
Dependent Claim
258 words
A binary-coding system comprising: an image sensor which senses the state of an n th , i th picture element within a plurality of picture elements by scanning an n th line of said picture elements in a main scanning direction, comparator means for comparing an analog picture signal outputted by said image sensor with a plurality of reference voltage signals, said comparator means outputting a binary-coded output signal indicative of said state of each of said plurality of picture elements; first storage means receiving the output of said comparator means for storing a first binary-coded output signal indicative of a state of a first discrete picture element adjacent to said n th , i th picture element; second storage means receiving the output of said comparator means for storing a second binary-coded output signal indicative of a state of a second discrete picture element adjacent to said n th , i th picture element; logic means comprising a plurality of discrete dissimilar logic gates for comparing said first binary-coded signal with said second binary-coded signal, each of said dissimilar logic gates producing an output signal; said comparator means comprising a plurality of comparator gates which compare said analog picture signal to a plurality of dissimilar reference voltage levels and output a plurality of comparison signals; and a multiplexer which receives both of said dissimilar logic gate output signals and said comparison signals and outputs one of said comparison signals as said binary-coded output signal as a function of the states of said dissimilar logic gate output signals.
Claim 7
Dependent Claim
258 words
A binary-coding system comprising: an image sensor which senses the state of an n th , i th picture element within a plurality of picture elements by scanning an n th line of said picture elements in a main scanning direction, comparator means for comparing an analog picture signal outputted by said image sensor with a plurality of reference voltage signals, said comparator means outputting a binary-coded output signal indicative of said state of each of said plurality of picture elements; first storage means receiving the output of said comparator means for storing a first binary-coded output signal indicative of a state of a first discrete picture element adjacent to said n th , i th picture element; second storage means receiving the output of said comparator means for storing a second binary-coded output signal indicative of a state of a second discrete picture element adjacent to said n th , i th picture element; logic means comprising a plurality of discrete dissimilar logic gates for comparing said first binary-coded signal with said second binary-coded signal, each of said dissimilar logic gates producing an output signal; said comparator means comprising a plurality of comparator gates which compare said analog picture signal to a plurality of dissimilar reference voltage levels and output a plurality of comparison signals; and a multiplexer which receives both of said dissimilar logic gate output signals and said comparison signals and outputs one of said comparison signals as said binary-coded output signal as a function of the states of said dissimilar logic gate output signals.
Claim 8
Dependent Claim
86 words
The binary-coding system as in claim 1 or claim 5, wherein said n th , i th picture element is within both an n th main scanning line of picture elements parallel to said main scanning direction and a i th sub-scanning line of picture elements perpendicular to said main scanning direction, said first adjacent discrete picture element being within said i th subscanning line of picture elements, and said second adjacent discrete picture element being within said n th main scanning line of picture elements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |