EP0369301A2
Expired / Lapsed
EP
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An apparatus of and a method for image reproducing with variable reproduction scale
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1989-11-07
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Granted: —
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Expires: 2009-11-07
Abstract
Abstract An apparatus for reproducing an image with a desired magnification other than that expressed in an integer comprises a key switch for inputting the desired magnification. When reproducing the image with the selected magnification, it is necessary to interpolate pixel dots by increasing or decreasing the number of pixel dots for each predetermined region. The pixel dots are output in accordance with interpolation tables. The image reproducing apparatus further comprises an interpolation table preparing device for preparing a plurality of interpolation tables having different positions for interpolating the pixel dots in each predetermined region in accordance with the desired magnification, and a switching device for switching among the plurality of interpolation tables at random for each scan line. Since the plurality of interpolation tables are switched for each scan line, no regular patterns appear on the reproduced images.
Inventors
- 👤 Masanao Dainippon Screen Mfg. Co. Ltd. Nakahara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 01:41
CPC Classifications
G; G06; G06T; G06T3/00; G06T3/40; G06T3/4007; H; H04; H04N; H04N1/00; H04N1/387; H04N1/393; H04N1/3935
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
140 words
An apparatus for reproducing an objective image by magnifying an original image with a magnification other than that expressed in an integer, comprising; image data generating means for outputting image data corresponding to each pixel of said original image, input means for inputting a reproducing magnification, instruction data generating means for outputting instruction data instructing interpolation processing on said image data in accordance with said reproducing magnification, said instruction data including interpolation data indicative of interpolating positions within a predetermined region based on said reproducing magnification, interpolating means for interpolating said image data in accordance with said instruction data, means for recording said objective image scan line after scan line in accordance with said image data as interpolated, and switch means for irregularly varying said interpolation data with predetermined timing, whereby said interpolating positions vary irregularly within the predetermined region.
Claim 2
Independent Claim
140 words
An apparatus for reproducing an objective image by magnifying an original image with a magnification other than that expressed in an integer, comprising; image data generating means for outputting image data corresponding to each pixel of said original image, input means for inputting a reproducing magnification, instruction data generating means for outputting instruction data instructing interpolation processing on said image data in accordance with said reproducing magnification, said instruction data including interpolation data indicative of interpolating positions within a predetermined region based on said reproducing magnification, interpolating means for interpolating said image data in accordance with said instruction data, means for recording said objective image scan line after scan line in accordance with said image data as interpolated, and switch means for irregularly varying said interpolation data with predetermined timing, whereby said interpolating positions vary irregularly within the predetermined region.
Claim 3
Dependent Claim
56 words
An apparatus as claimed in claim 1, wherein said instruction data generating means is operable to prepare a plurality of said instruction data having different output positions of said interpolation data within said predetermined region in accordance with said reproducing magnification, said switch means being operable to effect switching among the plurality of said instruction data.
Claim 4
Dependent Claim
35 words
An apparatus as claimed in claim 2, wherein said image is reproduced by outputting said image data for each scan line, said predetermined timing corresponding to a cycle of scanning a predetermined number of lines.
Claim 5
Dependent Claim
23 words
An apparatus as claimed in claim 3, wherein said predetermined timing corresponds to timing for starting scanning of said predetermined number of lines.
Claim 6
Dependent Claim
23 words
An apparatus as claimed in claim 3, wherein said predetermined timing corresponds to timing for finishing scanning of said predetermined number of lines.
Claim 7
Dependent Claim
37 words
An apparatus as claimed in claim 2, further comprising random number generating means for generating random number, said switch means being operable to effect switching among the plurality of said instruction data based on said random numbers.
Claim 8
Dependent Claim
43 words
An apparatus as claimed in claim 6, wherein said image is reproduced by outputting said image data in a main scanning direction and in an subscanning direction intersecting said main scanning direction, said instruction data including instruction data for said main scanning direction.
Claim 9
Dependent Claim
42 words
An apparatus as claimed in claim 6, wherein said image is reproduced by outputting said image data in a main scanning direction and in an subscanning direction intersecting said main scanning direction, said instruction data including instruction data for said subscanning direction.
Claim 10
Dependent Claim
24 words
An apparatus as claimed in claim 2, wherein said instruction data generating means includes memory means for storing the plurality of said instruction data.
Claim 11
Dependent Claim
51 words
An apparatus as claimed in claim 1, wherein said instruction data includes a plurality of data arranged in a predetermined order, said plurality of data being successively read from predetermined positions of said instruction data, and said switch means being operable to vary a read-out starting positions for said instruction data.
Claim 12
Dependent Claim
35 words
An apparatus as claimed in claim 9, wherein said image is reproduced by outputting said image data for each scan line, said predetermined timing corresponding to a cycle of scanning a predetermined number of lines.
Claim 13
Independent Claim
23 words
An apparatus as claimed in clam 11, wherein said predetermined timing corresponds to timing for starting scanning of said predetermine number of lines.
Claim 14
Dependent Claim
23 words
An apparatus as claimed in claim 12, wherein said predetermined timing corresponds to timing for finishing scanning of said predetermined number of lines.
Claim 15
Dependent Claim
37 words
An apparatus as claimed in claim 12, further comprising random number generating means for generating random numbers, said switch means being operable to effect switching among the plurality of said instruction data based on said random numbers.
Claim 16
Dependent Claim
37 words
An apparatus as claimed in claim 1, wherein a plurality of said interpolation data are prepared for said predetermined region in accordance with said reproducing magnification, said interpolation data being arranged substantially uniformly through said predetermined region.
Claim 17
Dependent Claim
56 words
An apparatus as claimed in claim 15, wherein said instruction data generating means is operable to prepare a plurality of said instruction data having different output positions of said interpolation data within said predetermined region in accordance with said reproducing magnification, said switch means being operable to effect switching among the plurality of said instruction data.
Claim 18
Dependent Claim
43 words
An apparatus as claimed in claim 16, wherein said image is reproduced by outputting said image data in a main scanning direction and in an subscanning direction intersecting said main scanning direction, said instruction data including instruction data for said main scanning direction.
Claim 19
Independent Claim
79 words
A method of reproducing an image from pre-recorded image data with a desired magnification other than that expressed in an integer, comprising the steps of; inputting the desired magnification, preparing instruction data for outputting pixel dot data to form said image, said instruction data including interpolation data for adding/skipping said pixel dot data to/from each predetermined region in accordance with said selected magnification, and switching positions of said interpolation data within said predetermined region at random with predetermined timing.
Claim 20
Independent Claim
79 words
A method of reproducing an image from pre-recorded image data with a desired magnification other than that expressed in an integer, comprising the steps of; inputting the desired magnification, preparing instruction data for outputting pixel dot data to form said image, said instruction data including interpolation data for adding/skipping said pixel dot data to/from each predetermined region in accordance with said selected magnification, and switching positions of said interpolation data within said predetermined region at random with predetermined timing.
Claim 21
Dependent Claim
68 words
A method as claimed in claim 18, wherein said step of preparing instruction data for outputting pixel dot data to from said image includes the step of preparing a plurality of said instruction data having different output positions of said interpolation data within said predetermined region in accordance with said desired magnification, said random switching step including the step of switching among the plurality of said instruction data.
Claim 22
Dependent Claim
49 words
A method as claimed in claim 19, wherein said image is reproduced by outputting said pixel dot data for each scan line, said step of switching at random with predetermined timing including the step of switching among the plurality of said instruction data at random for each scan line.
Claim 23
Dependent Claim
39 words
A method as claimed in claim 20, wherein said step of switching at random with predetermined timing includes the steps of generating random numbers, and switching among the plurality of said instruction data in accordance with said random numbers.
References Cited (Backward Citations)
No citation records indexed.
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