EP0248616A2
Expired / Lapsed
EP
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Picture printing apparatus
Assignee: Toshiba Corp
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Filing: 1987-06-01
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Granted: —
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Expires: 2007-06-01
Abstract
Abstract A picture printing apparatus includes a picture type judgement means, and a best mode printing system is determined according to the judging result. A mixed mode picture including a binary picture element and a gradational picture element is printed to utilize selectively the binary method, multivalence concentration pattern method and the dither method.
Inventors
- 👤 Kiyoshi Yamada
- 👤 Shuzo Hirahara
- 👤 Toshikazu Matsui
- 👤 Kazuhiko Higuchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 19:04
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/403; H04N1/40062; H04N1/40087; H04N1/405; H04N1/4051
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
141 words
A picture printing apparatus for reproducing an original image comprising means for detecting the picture signal from each of a plurality of individual areas on the original image, each area being divided into a plurality of dot segments; means for generating a multivalence concentration pattern including a variable dot value corresponding to each dot segment of the original image in response to the detecting means; means responsive to the detecting means for generating a binary pattern including one of two fixed dot values corresponding to each dot segment of the original image; means for selecting the dot value from one of the binary and multivalence patterns corresponding to each individual dot segment to be printed; and means for printing dots in the dot segments corresponding to the selected dot values in response to the selecting means for reproducing the original image.
Claim 2
Dependent Claim
141 words
A picture printing apparatus for reproducing an original image comprising means for detecting the picture signal from each of a plurality of individual areas on the original image, each area being divided into a plurality of dot segments; means for generating a multivalence concentration pattern including a variable dot value corresponding to each dot segment of the original image in response to the detecting means; means responsive to the detecting means for generating a binary pattern including one of two fixed dot values corresponding to each dot segment of the original image; means for selecting the dot value from one of the binary and multivalence patterns corresponding to each individual dot segment to be printed; and means for printing dots in the dot segments corresponding to the selected dot values in response to the selecting means for reproducing the original image.
Claim 3
Dependent Claim
58 words
The apparatus of claim 1, also including means for generating a dither pattern including one of a plurality of fixed threshold dot values corresponding to each dot segment of the original image, and wherein the selecting means includes means for alternatively selecting the threshold dot value from the dither pattern corresponding to predetermined individual dots to be printed.
Claim 4
Dependent Claim
156 words
A picture printing apparatus for reproducing an original color image based comprising means for detecting the picture signal from each of a plurality of individual areas on the original image, each area being divided into a plurality of dot segments, including a high resolution sensor and a low resolution sensor: means for generating a multivalence eoncentration pattern including a variable dot value corresponding to each dot segment of the original image in response to the low resolution sensor; means responsive to the low resolution sensor for generating a binary pattern including one of two fixed dot values corresponding to each dot segment of the original image; means responsive to the high resolution sensor for selecting the dot value from one of the binary and multivalence patterns corresponding to each individual dot segment to be printed; and means for printing dots in the dot segments corresponding to the selected dot values in response to the selecting means.
Claim 5
Dependent Claim
156 words
A picture printing apparatus for reproducing an original color image based comprising means for detecting the picture signal from each of a plurality of individual areas on the original image, each area being divided into a plurality of dot segments, including a high resolution sensor and a low resolution sensor: means for generating a multivalence eoncentration pattern including a variable dot value corresponding to each dot segment of the original image in response to the low resolution sensor; means responsive to the low resolution sensor for generating a binary pattern including one of two fixed dot values corresponding to each dot segment of the original image; means responsive to the high resolution sensor for selecting the dot value from one of the binary and multivalence patterns corresponding to each individual dot segment to be printed; and means for printing dots in the dot segments corresponding to the selected dot values in response to the selecting means.
References Cited (Backward Citations)
No citation records indexed.
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