EP0284043A2
Expired / Lapsed
EP
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Method of and apparatus for connecting output image signals from a plurality of line image sensors
Assignee: Dainippon Screen Manufacturing Co Ltd
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Filing: 1988-03-23
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Granted: —
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Expires: 2008-03-23
Abstract
Abstract An amount of a read position error in the subscanning direction between line image sensors (CCD1, CCD2, CCD3) is obtained by scanning and reading a correction read pattern (6a, 6b). In scanning of an original, output image signals from the line image sensors (CCD1, CCD2, CCD3) are relatively delayed by a line number corresponding to the amount of the read position error between the line image sensors (CCD1, CCD2, CCD3), to correct time difference, caused by the read position error, in information reading in the boundary portion of the line image sensors.
Inventors
- 👤 Kiyoomi Dainippon Screen Mfg. Co. Ltd Mitsuki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 15:47
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/1903; H04N1/047; H04N1/191; H04N1/192; H04N1/193; H04N1/1934; H04N2201/00; H04N2201/024; H04N2201/02406; H04N2201/02425; H04N2201/02439; H04N2201/02441; H04N2201/028; H04N2201/03; H04N2201/031; H04N2201/03104; H04N2201/0315; H04N2201/03162; H04N2201/04; H04N2201/047; H04N2201/04701; H04N2201/04703; H04N2201/04715; H04N2201/0472; H04N2201/04729; H04N2201/04731; H04N2201/04732; H04N2201/04753; H04N2201/04758; H04N2201/04787; H04N2201/04789; H04N2201/04791; H04N2201/04793; H04N2201/04794; H04N2201/04796
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
171 words
A method of connecting output image signals from a plurality of line image sensors, which are arrayed in a main scanning direction for scanning an original to obtain image information, by correcting an error in read positions of the line image sensors, which method comprises: providing a correction read pattern having at least a first pattern uniquely defining a subscanning coordinate with respect to a main scanning coordinate in a scanning plane and having at least two points of intersection with each portion of a main scanning line corresponding to a line image sensor; scanning the first pattern and determining the amount of a read position error in a subscanning direction between the line image sensors from read pixel addresses of the line image sensors; scanning the original and connecting the output image signals from the line image sensors by relatively delaying the output image signals by a number of scanning lines corresponding to the determined amount of the read position error in the subscanning direction between the line image sensors.
Claim 2
Independent Claim
171 words
A method of connecting output image signals from a plurality of line image sensors, which are arrayed in a main scanning direction for scanning an original to obtain image information, by correcting an error in read positions of the line image sensors, which method comprises: providing a correction read pattern having at least a first pattern uniquely defining a subscanning coordinate with respect to a main scanning coordinate in a scanning plane and having at least two points of intersection with each portion of a main scanning line corresponding to a line image sensor; scanning the first pattern and determining the amount of a read position error in a subscanning direction between the line image sensors from read pixel addresses of the line image sensors; scanning the original and connecting the output image signals from the line image sensors by relatively delaying the output image signals by a number of scanning lines corresponding to the determined amount of the read position error in the subscanning direction between the line image sensors.
Claim 3
Dependent Claim
86 words
A method according to claim 1, further comprising: determining the amount of angular deviation of each of the plurality of line image sensors from read pixel addresses of the line image sensors upon scanning the first pattern as a number (n) of scanning lines; and correcting for the angular deviation upon scanning the original by relatively delaying the output image signals from the line image sensors sequentially by one lines per A/n pixels (where A represents the effective number of pixels of each line image sensor).
Claim 4
Dependent Claim
46 words
A method according to claim 2, wherein the correcting of the angular deviation comprises the steps of: producing image signals obtained by delaying said output image signals of the line image sensors by 0 to n lines; and selecting the produced image signals every A/n pixels.
Claim 5
Independent Claim
79 words
A method according to any one of claims 1 to 3, wherein the plurality of line image sensors are arrayed partially to overlap with each other in an adjacent region and the correction read pattern has a second pattern exending in the subscanning direction, which method comprises connecting pixels of adjacent line image sensors in the main scanning direction upon scanning the second pattern by making corresponding pixel addresses of the adjacent line image sensors identical to each other.
Claim 6
Dependent Claim
18 words
A method according to claim 4, wherein the first and second patterns are formed by a thin line.
Claim 7
Independent Claim
192 words
An apparatus for connecting output image signals from a plurality of line image sensors (CCD1, CCD2, CCD3), which are arrayed in the main scanning direction for scanning an original to obtain image information, by correcting an error in read positions of the line image sensors, which apparatus comprises: a correction read pattern (6) having at least a first pattern (6b) uniquely defining a subscanning coordinate with respect to a main scanning coordinate in a scanning plane and having at least two points of intersection with each portion of a main scanning line corresponding to a line image sensors; means (7, 8, 9) for determining the amount of a read position error in a subscanning direction between the line image sensors from read pixel addresses of the line image sensors upon scanning of the first pattern by the line image sensors; and means ( 10-16) for connecting the output image signals obtained from the line image sensors upon scanning the original by relatively delaying the output image signals by a number of scanning lines corresponding to the determined amount of the read position error in the subscanning direction between the line image sensors.
Claim 8
Independent Claim
192 words
An apparatus for connecting output image signals from a plurality of line image sensors (CCD1, CCD2, CCD3), which are arrayed in the main scanning direction for scanning an original to obtain image information, by correcting an error in read positions of the line image sensors, which apparatus comprises: a correction read pattern (6) having at least a first pattern (6b) uniquely defining a subscanning coordinate with respect to a main scanning coordinate in a scanning plane and having at least two points of intersection with each portion of a main scanning line corresponding to a line image sensors; means (7, 8, 9) for determining the amount of a read position error in a subscanning direction between the line image sensors from read pixel addresses of the line image sensors upon scanning of the first pattern by the line image sensors; and means ( 10-16) for connecting the output image signals obtained from the line image sensors upon scanning the original by relatively delaying the output image signals by a number of scanning lines corresponding to the determined amount of the read position error in the subscanning direction between the line image sensors.
Claim 9
Dependent Claim
94 words
An apparatus according to claim 6, further comprising: means for determining the amount of angular deviation of each of the plurality of line image sensors from read pixel addresses of the line image sensors upon scanning of the first pattern by the line image sensors as a number (n) scanning lines; and means for correcting the angular deviation upon scanning the original by relatively delaying the output image signals from the line image sensors sequentially by one line per A/n pixels (where A represents the effective number of pixels of each line image sensor).
Claim 10
Dependent Claim
53 words
An apparatus according to claim 7, wherein the means for performing correction of the angular deviation comprises: means (17) for producing image signals obtained by delaying said output image signals of the line image sensors by 0 to n lines; and means (9, 18) for selecting the produced image signals every A/n pixels.
Claim 11
Independent Claim
77 words
An apparatus according to any one of claims 6 to 8, wherein the plurality of line image sensors are arrayed partially to overlap with each other in an adjacent region and the correction read pattern has a second pattern (6a) extending in the subscanning direction, which apparatus comprises means (9) for connecting pixels of adjacent line image sensors in the main scanning direction upon scanning the second pattern by making corresponding pixel addresses identical to each other.
Claim 12
Dependent Claim
18 words
An apparatus according to claim 9, wherein the first and second patterns are formed by a thin line.
Claim 13
Independent Claim
87 words
An apparatus according to any one of claims 6 to 9, wherein the means for connecting the output image signals from the line image sensors comprises: storage means (13-15) for storing the output image signals and means (10-12, 16) for addressing write and read addresses of the storage means so that the output image signals read from the storage means are relatively delayed between the line image sensors by a number of scanning lines corresponding to the amount of the read position error in the subscanning direction.
References Cited (Backward Citations)
No citation records indexed.
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