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EP0198269A2
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Method and apparatus for interpolating image signals
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1986-03-21
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Granted: —
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Expires: 2006-03-21
Abstract
Abstract Image signals inputted from an input device - (73) are subjected to A-D conversion through an A-D converter (74), to be stored in memory (75) by at least an adjacent pair of pixels. The pair of pixels are interpolated by interpolation arithmetic circuit (76, 88) so that generated interpolation data and data on the pair of pixels are ordered under ocntrol by a timing controller (87) to be outputted.
Inventors
- 👤 Kunio Tomohisa
- 👤 Masamichi Cho
- 👤 Yasuo Kurusu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 19:04
CPC Classifications
G; G06; G06T; G06T3/00; G06T3/40; G06T3/4007; G06F; G06F17/00; G06F17/10; G06F17/17; G06F17/175
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
80 words
An apparatus for interpolating image signals, which comprises: memory means for storing data on at least two adjacent pixels of an input image; interpolation data generating means for interpolating between said two pixels to generate at least one interpolation data; and timing control means for controlling output timings so that said image data on said two adjacent pixels and said generated interpolation data are outputted in a mode ordered in accordance with an array of pixels of an output image.
Claim 2
Independent Claim
80 words
An apparatus for interpolating image signals, which comprises: memory means for storing data on at least two adjacent pixels of an input image; interpolation data generating means for interpolating between said two pixels to generate at least one interpolation data; and timing control means for controlling output timings so that said image data on said two adjacent pixels and said generated interpolation data are outputted in a mode ordered in accordance with an array of pixels of an output image.
Claim 3
Dependent Claim
64 words
An apparatus for interpolating image signals in accordance with claim 1, further including: a one-dimensional photoelectric conversion element array device for photoelectrically scanning an original, and an A-D converter for converting input image signals from said one-dimensional photoelectric conversion element array device into digital image data, input resolution by said one-dimensional photoelectric conversion element array device being set to be lower than output resolution.
Claim 4
Dependent Claim
150 words
An apparatus for interpolating image signals in accordance with claim 2, wherein said memory means includes a first memory means for storing a pair of image data adjacent in the main scanning direction and a second memory means for storing image data on a pair of scanning lines adjacent in the vertical scanning directoion, and said interpolation data generating means includes a first interpolation data generating means for generating interpolation data for said image data stored in said first memory means and a second interpolation data generating means for generating interpolation data for said image data stored in said second memory means, said first memory means storing image data from said A-D converter and said second memory means storing said image data stored in said first memory means and said interpolation data generated by said first interpolation data generating means in compliance with said order by said timing control means.
Claim 5
Dependent Claim
149 words
An apparatus for interpolating image signals in accordance with claim 2, wherein said memory means includes a first memory means for storing a pair of image data adjacent in the main scanning direction and a second memory means for storing image data on a pair of scanning lines adjacent in the vertical scanning direction, and said interpolation data generating means includes a first interpolation data generating means for generating interpolation data for said image data stored in said first memory means and a second interpolation data generating means for generating interpolation data for said image data stored in said second memory means, said second memory means storing image data from said A-D converter, said first memory means storing said image data stored in said second memory means and said interpolation data generated by said second interpolation data generating means in compliance with said order by said timing control means.
Claim 6
Dependent Claim
75 words
An apparatus for interpolating image signals in accordance with claim 1, further comprising: clock generation means for generating second clocks by regularly defaulting clocks from an array of periodic first clocks on the basis of a prescribed rule in correspondence to a magnification for enlargement, and write/read means for storing said image data in said memory means on the basis of said first clocks while reading said image data in response to said second clocks.
Claim 7
Independent Claim
72 words
A method of interpolating image signals, which comprises the steps of: storing image data on at least two pixels of an input image adjacent in at least one of main and vertical scanning directions; interpolating between said two pixels to generate at least one interpolation data; and ordering said image data on said two adjacent pixels and said generated image data in accordance with an array of pixels of an output image.
Claim 8
Independent Claim
72 words
A method of interpolating image signals, which comprises the steps of: storing image data on at least two pixels of an input image adjacent in at least one of main and vertical scanning directions; interpolating between said two pixels to generate at least one interpolation data; and ordering said image data on said two adjacent pixels and said generated image data in accordance with an array of pixels of an output image.
Claim 9
Dependent Claim
64 words
A method of interpolating image signals in accordance with claim 6, further including the steps of: photoelectrically scanning an original by a one-dimensional photoelectric conversion element array device to obtain input signals, and performing A-D conversion on said input image signals to obtain digital image data, input resolution by said one-dimensional photoelectric conversion element array device being set to be lower than output resolution.
Claim 10
Dependent Claim
45 words
A method of interpolating image signals in accordance with claim 7, wherein interpolation is performed with respect to one of main and vertical scanning directions to further perform interpolation on the other direction with respect to image data obtained as the result of said interpolation.
Claim 11
Dependent Claim
49 words
A method of interpolating image signals in accordance with claim 8, wherein ratios of output resolution to input resolution are independently set in respective ones of main and vertical scanning directions in integers, to perform interpolation in the main and vertical scanning directions on the basis of said ratios.
Claim 12
Dependent Claim
46 words
A method of interpolating image signals in accordance with claim 9, wherein ratios of charge storage times of said one-dimensional photoelectric conversion element array device to unit vertical scanning intervals of output image signals are equal to those of said output resolution to said input resolution.
Claim 13
Independent Claim
161 words
An apparatus for interpolating image signals in an image processing unit for receiving image data of original pixeles to store the same in image data memory means thereby to output said image data in a designated magnification, said apparatus comprising: clock generating means for generating second clocks by regularly defaulting clocks from an array of periodic first clocks on the basis of a prescribed rule in compliance with said magnification; read means for reading said image data stored in said image data memory means on the basis of said first clocks when said magnification is for enlargement, said reading being performed on the basis of said second clocks; interpolation data generating means for interpolating said image data as read to generate at least one interpolation data; and interpolation data assigning means for selectively assigning said interpolation data to additional pixels added by said default of said clocks on the basis of selection data previously set in correspondence to said prescribed rule.
Claim 14
Independent Claim
161 words
An apparatus for interpolating image signals in an image processing unit for receiving image data of original pixeles to store the same in image data memory means thereby to output said image data in a designated magnification, said apparatus comprising: clock generating means for generating second clocks by regularly defaulting clocks from an array of periodic first clocks on the basis of a prescribed rule in compliance with said magnification; read means for reading said image data stored in said image data memory means on the basis of said first clocks when said magnification is for enlargement, said reading being performed on the basis of said second clocks; interpolation data generating means for interpolating said image data as read to generate at least one interpolation data; and interpolation data assigning means for selectively assigning said interpolation data to additional pixels added by said default of said clocks on the basis of selection data previously set in correspondence to said prescribed rule.
Claim 15
Dependent Claim
60 words
An apparatus for interpolating image signals in accordance with claim 11, wherein said clock generating means includes composite data memory means for collectively expressing data representing said prescribed rule and said selection data, said clock generating means and said interpolation data assigning means respectively performing processing on the basis of said composite data read from said composite data memory means.
Claim 16
Dependent Claim
101 words
An apparatus for interpolating image signals in accordance with claim 12, wherein said interpolation data generating means includes a plurality of linear interpolation arithmetic means for obtaining by arithmetic a plurality of linear interpolation data in response to positional relation between said additional pixels and said original pixels in said image data, said selection data corresponding to said positional relation between said additional pixels and said original pixels, said interpolation data assigning means including selection and assigning means for selecting one of said plurality of interpolation data in response to said selection data to assign the same to said additional pixels.
References Cited (Backward Citations)
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