US4776031A
Expired / Lapsed
US
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Image reading apparatus
Assignee: Canon Inc
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Filing: 1986-03-26
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Granted: 1988-10-04
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Expires: 2006-03-26
Abstract
Abstract An image reading apparatus has CCD line sensors, shift registers, a selector, and an arithmetic unit. Image data lost corresponding to joints in the CCD line sensors is interpolated using image data adjacent the lost data. The interpolation data is obtained by calculating the average values of the image data preceding and succeeding the lost data, and calculating the density gradient in the joint using the average values. The joint section can be divided into halves, and each half can be interpolated using image data near thereto. Original images can be reproduced with high precision without adverse influences of joints in the sensors.
Inventors
- 👤 Yoshinobu Mita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:15
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N1/40; H04N1/409; H04N25/00; H04N25/70; H04N25/701; H04N25/7013
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
120 words
An image reading apparatus comprising: a plurality of line sensors for reading an original image and generating image data, each of said line sensors comprising plural photosensor elements and said line sensors being arranged to read a same line of the image on a share basis with a gap between two adjacent ones of said line sensors; means for forming pseudo image data corresponding to the gap between two adjacent ones of said line sensors by using the image data of at least one pixel adjacent to the gap; and means for inserting the pseudo image data formed by said forming means into a portion corresponding to the gap in the image data outputted from said plurality of line sensors.
Claim 2
Dependent Claim
120 words
An image reading apparatus comprising: a plurality of line sensors for reading an original image and generating image data, each of said line sensors comprising plural photosensor elements and said line sensors being arranged to read a same line of the image on a share basis with a gap between two adjacent ones of said line sensors; means for forming pseudo image data corresponding to the gap between two adjacent ones of said line sensors by using the image data of at least one pixel adjacent to the gap; and means for inserting the pseudo image data formed by said forming means into a portion corresponding to the gap in the image data outputted from said plurality of line sensors.
Claim 3
Dependent Claim
19 words
An apparatus according to claim 1, wherein said plurality of line sensors are aligned in line on a substrate.
Claim 4
Dependent Claim
29 words
An apparatus according to claim 1, wherein said forming means forms the pseudo image data having average values of a plurality of image data preceding and succeeding the gap.
Claim 5
Dependent Claim
33 words
An apparatus according to claim 1, wherein said forming means forms the pseudo image data in accordance with change of a plurality of image data at least either preceding or succeeding the gap.
Claim 6
Dependent Claim
27 words
An apparatus according to claim 1, wherein said forming means forms pseudo image data equal to image data of at least one pixel adjacent to the gap.
Claim 7
Dependent Claim
38 words
An apparatus according to claim 1, wherein the gap between two adjacent ones of line sensors is a plurality of pixels of one, and said forming means forms a plurality of pseudo image data corresponding to the gap.
Claim 8
Dependent Claim
45 words
An apparatus according to claim 1, wherein said forming means has means for holding the image data of at least one pixel adjacent to the gap, and forms the pseudo image data corresponding to the gap, using the image data held by said holding means.
Claim 9
Dependent Claim
30 words
An apparatus according to claim 1, wherein said forming means forms the pseudo image data in accordance with difference between a plurality of image data preceding and succeeding the gap.
Claim 10
Dependent Claim
128 words
An image reading apparatus comprising: a plurality of line sensors for reading an original image and generating image data, each of said line sensors comprising plural photosensor elements and said line sensors being arranged to read a same line of the image on a share basis with a gap between two adjacent ones of said line sensors; means for forming pseudo image data corresponding to the gap between two adjacent ones of said line sensors in accordance with change in image density levels of a plurality of image data at least either preceding or succeeding the gap; and means for inserting the pseudo image data formed by said forming means into a portion corresponding to the gap in the image data outputted from said plurality of line sensors.
Claim 11
Dependent Claim
128 words
An image reading apparatus comprising: a plurality of line sensors for reading an original image and generating image data, each of said line sensors comprising plural photosensor elements and said line sensors being arranged to read a same line of the image on a share basis with a gap between two adjacent ones of said line sensors; means for forming pseudo image data corresponding to the gap between two adjacent ones of said line sensors in accordance with change in image density levels of a plurality of image data at least either preceding or succeeding the gap; and means for inserting the pseudo image data formed by said forming means into a portion corresponding to the gap in the image data outputted from said plurality of line sensors.
Claim 12
Dependent Claim
19 words
An apparatus according to claim 9, wherein said plurality of line sensors are aligned in line on a substrate.
Claim 13
Dependent Claim
31 words
An apparatus according to claim 9, further comprising means for detecting the change in image density levels of the plurality of image data at least either preceding or succeeding the gap.
Claim 14
Dependent Claim
37 words
An apparatus according to claim 9, wherein said forming means forms a plurality of pseudo image data in accordance with the changes in image density levels of the plurality of image data preceding and succeeding the gap.
Claim 15
Dependent Claim
41 words
An apparatus according to claim 9, wherein the gap between two adjacent ones of line sensors is a plurality of pixels of one, and said forming means forms a plurality of pseudo image data representing at least two different density levels.
Claim 16
Dependent Claim
48 words
An apparatus according to claim 9, wherein said forming means has means for holding a plurality of image data at least either preceding or succeeding the gap, and forms the pseudo image data corresponding to the gap, using the plurality of image data held by said holding means.
Claim 17
Dependent Claim
136 words
An image reading apparatus comprising: a plurality of line sensors for reading an original image and generating image data, each of said line sensors comprising plural photosensor elements and said line sensors being arranged to read a same line of the image on a share basis with a gap consisting of a plurality of pixels between two adjacent ones of said line sensors; means for forming a plurality of pseudo image data representing at least two different density levels corresponding to the gap between two adjacent ones of said line sensors in accordance with image data of at least one pixel adjacent to the gap; and means for inserting the pseudo image data formed by said forming means into a portion corresponding to the gap in the image data outputted from said plurality of line sensors.
Claim 18
Dependent Claim
136 words
An image reading apparatus comprising: a plurality of line sensors for reading an original image and generating image data, each of said line sensors comprising plural photosensor elements and said line sensors being arranged to read a same line of the image on a share basis with a gap consisting of a plurality of pixels between two adjacent ones of said line sensors; means for forming a plurality of pseudo image data representing at least two different density levels corresponding to the gap between two adjacent ones of said line sensors in accordance with image data of at least one pixel adjacent to the gap; and means for inserting the pseudo image data formed by said forming means into a portion corresponding to the gap in the image data outputted from said plurality of line sensors.
Claim 19
Dependent Claim
19 words
An apparatus according to claim 15, wherein said plurality of line sensors are aligned in line on a substrate.
Claim 20
Dependent Claim
37 words
An apparatus according to claim 15, wherein said forming means forms the pseudo image data in accordance with change in image density levels of the plurality of image data at least either preceding or succeeding the gap.
Claim 21
Dependent Claim
30 words
An apparatus according to claim 15, wherein said forming means forms a plurality of pseudo image data representing different density levels corresponding to first and second halves of the gap.
Claim 22
Dependent Claim
32 words
An apparatus according to claim 15, wherein said forming means forms the plurality of pseudo image data in accordance with difference between a plurality of image data preceding and succeeding the gap.
Claim 23
Dependent Claim
31 words
An apparatus according to claim 15, wherein said forming means forms the plurality of pseudo image data in accordance with image data preceding the gap and image data succeeding the gap.
Claim 24
Dependent Claim
47 words
An apparatus according to claim 15, wherein said forming means has means for holding the image data of at least one pixel adjacent to the gap, and forms the plurality of pseudo image data corresponding to the gap, using the image data held by said holding means.
Claim 25
Dependent Claim
117 words
An image reading apparatus comprising: a plurality of line sensors for reading an original image and generating image data, each of said line sensors comprising plural photosensor elements and said line sensors being arranged to read a same line of the image on a share basis with a gap between two adjacent ones of said line sensors; means for forming pseudo image data corresponding to the gap between two adjacent ones of said line sensors in accordance with the image data preceding and succeeding the gap; and means for inserting the pseudo image data formed by said forming means into a portion corresponding to the gap in the image data outputted from said plurality of line sensors.
Claim 26
Dependent Claim
117 words
An image reading apparatus comprising: a plurality of line sensors for reading an original image and generating image data, each of said line sensors comprising plural photosensor elements and said line sensors being arranged to read a same line of the image on a share basis with a gap between two adjacent ones of said line sensors; means for forming pseudo image data corresponding to the gap between two adjacent ones of said line sensors in accordance with the image data preceding and succeeding the gap; and means for inserting the pseudo image data formed by said forming means into a portion corresponding to the gap in the image data outputted from said plurality of line sensors.
Claim 27
Dependent Claim
19 words
An apparatus according to claim 22, wherein said plurality of line sensors are aligned in line on a substrate.
Claim 28
Dependent Claim
29 words
An apparatus according to claim 22, wherein said forming means forms the pseudo image data having average value of a plurality of image data preceding and succeeding the gap.
Claim 29
Dependent Claim
35 words
An apparatus according to claim 22, wherein said forming means forms the pseudo image data in accordance with the changes in image density levels of a plurality of image data preceding and succeeding the gap.
Claim 30
Dependent Claim
30 words
An apparatus according to claim 22, wherein said forming means forms the pseudo iamge data in accordance with difference between a plurality of image data preceding and succeeding the gap.
Claim 31
Dependent Claim
38 words
An apparatus according to claim 22, wherein the gap between two adjacent ones of line sensors is a plurality of pixels of one, and said forming means forms a plurality of pseudo image data corresponding to the gap.
Claim 32
Dependent Claim
40 words
An apparatus according to claim 22, wherein said forming means has means for holding image data preceding and succeeding the gap, and forms the pseudo image data corresponding to the gap, using the image data held by said holding means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |