US20070064273A1 - Method of effacing zipper image - Google Patents

Method of effacing zipper image Download PDF

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Publication number
US20070064273A1
US20070064273A1 US11/513,730 US51373006A US2007064273A1 US 20070064273 A1 US20070064273 A1 US 20070064273A1 US 51373006 A US51373006 A US 51373006A US 2007064273 A1 US2007064273 A1 US 2007064273A1
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value
nth pixel
pixel value
nth
image
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Abandoned
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US11/513,730
Inventor
Chen-Hsiang Shih
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Transpacific Systems LLC
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Transpacific IP Ltd
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Priority claimed from TW90127726A external-priority patent/TW535407B/en
Application filed by Transpacific IP Ltd filed Critical Transpacific IP Ltd
Priority to US11/513,730 priority Critical patent/US20070064273A1/en
Assigned to UMAX DATA SYSTEMS, INC. reassignment UMAX DATA SYSTEMS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SHIH, CHEN HSIANG
Assigned to TRANSPACIFIC IP, LTD. reassignment TRANSPACIFIC IP, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VEUTRON CORPORATION
Assigned to VEUTRON CORPORATION reassignment VEUTRON CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: UMAX DATA SYSTEMS, INC.
Publication of US20070064273A1 publication Critical patent/US20070064273A1/en
Assigned to TRANSPACIFIC SYSTEMS, LLC reassignment TRANSPACIFIC SYSTEMS, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TRANSPACIFIC IP LTD.
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/1911—Simultaneously or substantially simultaneously scanning picture elements on more than one main scanning line, e.g. scanning in swaths
    • H04N1/1916—Simultaneously or substantially simultaneously scanning picture elements on more than one main scanning line, e.g. scanning in swaths using an array of elements displaced from one another in the main scan direction, e.g. a diagonally arranged array
    • H04N1/1917—Staggered element array, e.g. arrays with elements arranged in a zigzag
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/1911—Simultaneously or substantially simultaneously scanning picture elements on more than one main scanning line, e.g. scanning in swaths
    • H04N1/1918—Combination of arrays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
    • H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
    • H04N1/1932—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays using an array of elements displaced from one another in the sub scan direction, e.g. a diagonally arranged array
    • H04N1/1933—Staggered element arrays, e.g. arrays with elements arranged in a zigzag
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
    • H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays
    • H04N1/1934—Combination of arrays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/409—Edge or detail enhancement; Noise or error suppression
    • H04N1/4092—Edge or detail enhancement
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/1911—Simultaneously or substantially simultaneously scanning picture elements on more than one main scanning line, e.g. scanning in swaths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
    • H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Image Processing (AREA)

Abstract

A method of effacing zipper image, applicable to scan a document by a scanner with a stagger charge-coupled device. The nth (n is a positive integer) pixel obtained by scan on a scan line at which the zipper image is produced is subtracted by the (n+1)th pixel obtained by scan on the scan line. The absolute value of the result is then compared to a critical value. If the result is smaller than the critical value, the nth pixel is the nth pixel modified as the nth pixel after process.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The invention relates in general to a method of effacing zipper image, and more particularly, to a method of effacing zipper image by approximating the gray scales of two neighboring pixels.
  • 2. Description of the Related Art
  • FIG. 1 shows a block diagram of a scanner having a stagger charge-coupled device. In FIG. 1, the scanner 100 is coupled to a computer 150. The scanner comprises a stagger charge-coupled device 110 with a primary line and a secondary line, an application specific integrated circuit (ASIC) 120, an image compensation buffer 130 and an I/O interface 140.
  • When the scanner having the stagger charge-coupled device is scanning a document, the pitch between the primary line and the secondary line is small. The primary line is thus affected by the light reflected from the secondary line. Similarly, the secondary line is also affected by the light reflected from the primary line. A zipper image (as shown in FIG. 3) in addition to a real image (as shown in FIG. 2) is thus produced by using the scanner with the stagger charge-coupled device to scan the document. When a document has a black-and-white boundary, the zipper image is more obvious, causing error in the actual image. Currently, a method to compensate the zipper image has not been found in the prior art.
    • SUMMARY OF THE INTENTION
  • The invention provides a method of effacing a zipper image by approximating the gray scales of two neighboring pixels.
  • The method of effacing the zipper image provided by the invention is applicable to scan a document using a scanner with a stagger charge-coupled device. The nth pixel obtained by scan on a scan line at which the zipper image is produced is subtracted by the (n+1)th pixel obtained by scan on the scan line. The absolute value of the subtraction result is compared to a critical value. When the result is smaller than the critical value, the nth pixel is modified as the nth pixel after process. If the result is larger than the critical value, no process is performed.
  • The processed nth pixel is one half of the sum of the nth pixel obtained by scan and the (n+1)th pixel obtained by scan.
  • In one embodiment of the present invention, the nth pixel after being processed is the sum of one half of the nth pixel obtained by scan and one half of the (n+1)th pixel obtained by scan.
  • In one embodiment of the present invention, the critical value is a predetermined value or produced by a logic circuit. The critical value can be adjusted according to the modulation transfer function of the scanner with the stagger charge-coupled device.
  • Both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows a block diagram of a scanner with a stagger charge-coupled device;
  • FIG. 2 shows a real image of a document;
  • FIG. 3 shows a zipper image produced by scanning the document using a scanner with a stagger charge-coupled device; and
  • FIG. 4 shows a flow chart for a method of effacing a zipper image.
    • DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Referring to FIG. 1, a compensation operation is performed on a document before the document is scanned by a scanner 100 with a stagger charge-coupled device 110. Thereby, an image compensation parameter is obtained and stored in a computer 150. When the stagger charge-coupled device 110 performs the scan on any part of the document, an image compensation parameter corresponding to the scanned part is retrieved from the computer 150 and transmitted to the image compensation buffer 130 via the I/O interface 140. The staggered scanned image obtained from the stagger scan by the stagger charge-coupled device 110 is then corrected by the ASIC 120 according to the image compensation parameter transmitted from the image compensation buffer 130. The corrected image is then transmitted to the computer 150 via the I/O interface 140 for storage.
  • However, as the distance between the primary line and the secondary line is very short, the primary line is affected by the light reflected from the secondary line. Similarly, the secondary line is also affected by the light reflected from the primary line. A zipper image is thus produced to cause an error between the scanned image and the real image.
  • FIG. 4 shows a flow chart of effacing a zipper image according to the invention. In the following embodiment, a critical value used in the effacing process of the zipper image can be a predetermined value or a value generated by a logic circuit. In FIG. 4, assume that the nth (n is a positive integer) pixel obtained by scan on the scan line at which the zipper is produced is Pn, and the (n+1)th pixel obtained by scan on the scanning line is Pn+1. The nth pixel being processed is referred as Pn′, and the critical value is denoted as T. In this embodiment, whether Pn subtracted by Pn+1 is smaller than T is determined in step s400. When the absolute value of |Pn−Pn+1| is smaller than T, Pn is modified as Pn′. The value of Pn′ can be expressed as (Pn+Pn+1)/2 or (1/2)Pn+(1/2)Pn+1, as shown in step s410. The nth pixel after being processed as Pn′ approximates the gray values of the nth and (n+1)th pixel Pn and Pn+1 obtained by scan, so that the zipper image can be effaced. When |Pn−Pn+1| is larger than T, the effacing process is not performed.
  • The above embodiment compares two neighboring pixels at a scan line at which the zipper image is produced with a critical value as a reference for effacing process. If the effacing process is required, the gray values of these two neighboring pixels are approximated to each other to reduce the zipper image. However, the modulation transfer function of the scanner with the stagger charge-coupled device is slightly reduced.
  • According to the above, the invention has the following advantages:
  • 1. Only a critical value is required to determine whether an effacing process is performed, thereby, two gray scales of two neighboring pixels are approximated to each other, and the zipper image is effaced.
  • 2. The fabrication cost is not increased.
  • Other embodiments of the invention will appear to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples to be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims (15)

1-6. (canceled)
7. An apparatus comprising:
a scanner having a charge-coupled device capable of generating a scan line of pixel values; and
a processing module capable of:
determining an absolute value of a difference between an nth pixel value from said scanner in said scan line and an (n+1)th pixel value from said scanner in said scan line; and
modifying said nth pixel value in response to said absolute value not exceeding a critical value.
8. The apparatus of claim 7, wherein a value of the modified nth pixel substantially equals one half or nearly one half of a sum of the nth pixel value and the (n+1)th pixel value.
9. The apparatus of claim 7, wherein the value of the modified nth pixel substantially equals one half or nearly one half of the nth pixel value plus one half of the (n+1)th pixel value.
10. The apparatus of claim 7, wherein the processing module is capable of determining whether the absolute value is larger than the critical value.
11. The apparatus of claim 10, wherein the processing module is capable of inhibiting modification of said nth pixel value in response to the nth pixel exceeding a critical value.
12. The apparatus of claim 7, wherein the critical value comprises a predetermined value.
13. The apparatus of claim 7, wherein the processing module is adapted to adjust the critical value according to a modulation transfer function.
14. An apparatus comprising:
means for scanning an image;
means for processing the image to obtain pixel values of a scan line;
means for determining an absolute value of a difference between an nth pixel value in said scan line and an (n+1)th pixel value in said scan line; and
means for modifying said nth pixel value in response to said absolute value not exceeding a critical value.
15. The apparatus of claim 14, wherein the modified nth pixel value substantially equals one half or nearly one half of a sum of the nth pixel value and the (n+1)th pixel value.
16. The apparatus of claim 14, wherein the modified nth pixel value substantially equals one half or nearly one half of the nth pixel value added to one half of the (n+1)th pixel value.
17. The apparatus of claim 14, and further comprising means for determining whether the absolute value exceeds the critical value.
18. The apparatus of claim 17, and further comprising means for inhibiting modification of the nth pixel in response to the nth pixel value exceeding the critical value.
19. The apparatus of claim 14, wherein the critical value comprises a predetermined value.
20. The apparatus of claim 14, and further comprising means for adjusting the critical value according to a modulation transfer function.
US11/513,730 2001-11-08 2006-08-30 Method of effacing zipper image Abandoned US20070064273A1 (en)

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Applications Claiming Priority (5)

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TW90127726A TW535407B (en) 2001-11-08 2001-11-08 Method for weakening zipper image
TW90127726 2001-11-08
US10/047,680 US7012720B2 (en) 2002-01-14 2002-01-14 Method of effacing zipper image
US11/334,640 US7710612B2 (en) 2002-01-14 2006-01-17 Method of effacing zipper image
US11/513,730 US20070064273A1 (en) 2001-11-08 2006-08-30 Method of effacing zipper image

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326258A (en) * 1980-01-31 1982-04-20 Ncr Canada Ltd - Ncr Canada Ltee Method and apparatus for reducing the gray scale resolution of a digitized image
US5014333A (en) * 1988-07-21 1991-05-07 Eastman Kodak Company Image processor with smooth transitioning between dither and diffusion processes
US5031227A (en) * 1990-09-27 1991-07-09 Loral Aerospace Corp. Edge enhancement and smoothing in digital images
US5404233A (en) * 1990-08-28 1995-04-04 Kyocera Corporation Method for smoothing image
US6205248B1 (en) * 1991-10-03 2001-03-20 Ncr Corporation Method and system for compressing data in a multi-channel image processing system
US6212303B1 (en) * 1991-10-03 2001-04-03 Ncr Corporation Method and module system for high speed processing of item images
US6233011B1 (en) * 1997-02-15 2001-05-15 Acer Peripherals, Inc. Apparatus and method for compensating image being sensed
US20020085217A1 (en) * 2000-12-28 2002-07-04 Eiichi Sakaue Image processing apparatus and image processing system
US20030048958A1 (en) * 2001-05-29 2003-03-13 Kazuhiro Ishiguro Image processing apparatus, image processing method, and computer program product therefor
US6674903B1 (en) * 1998-10-05 2004-01-06 Agfa-Gevaert Method for smoothing staircase effect in enlarged low resolution images
US20040096099A1 (en) * 2002-11-19 2004-05-20 Realtek Semiconductor Corp. Apparatus for reducing zipper of image and method thereof
US7177482B2 (en) * 1999-12-16 2007-02-13 Sony Corporation Boundary line detection apparatus and method, and image processing apparatus and method as well as recording medium
USRE40179E1 (en) * 1998-08-31 2008-03-25 Lg Electronics Inc. Method of image filtering based on successive pixels

Family Cites Families (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120980B1 (en) 1983-03-30 1987-06-24 Ibm Deutschland Gmbh Crosstalk compensation circuit for electro-optical scanning devices
JPS60253368A (en) 1983-11-10 1985-12-14 Dainippon Screen Mfg Co Ltd Jag eliminating method for copied picture record display or the like
US4734583A (en) 1986-10-16 1988-03-29 General Electric Company Readout circuit for dual-gate CID imagers with charge sharing corrected for subtractive error
DE3752193T2 (en) 1986-11-14 1998-11-12 Canon Kk Color image processing device
US4774569A (en) 1987-07-24 1988-09-27 Eastman Kodak Company Method for adaptively masking off a video window in an overscanned image
JPH01101061A (en) 1987-10-14 1989-04-19 Canon Inc Picture reader
JP2632876B2 (en) 1987-10-23 1997-07-23 キヤノン株式会社 Image processing device
US5070414A (en) 1988-09-20 1991-12-03 Kabushiki Kaisha Toshiba Method and apparatus for reading image information formed on material
JP2837683B2 (en) 1989-04-17 1998-12-16 富士写真フイルム株式会社 Pixel line spacing correction method for image recording apparatus
US5355164A (en) 1990-06-25 1994-10-11 Fuji Photo Film Co., Ltd. Method and apparatus of correction image read signals by removing the influence of dark current therefrom
JP3070891B2 (en) 1993-04-02 2000-07-31 富士写真フイルム株式会社 Image interpolation processing method and color video printing method
DE69423418T2 (en) 1993-11-02 2000-09-21 Texas Instruments Inc Device and method for graphic data for television receivers
US5509086A (en) 1993-12-23 1996-04-16 International Business Machines Corporation Automatic cross color elimination
FR2727589B1 (en) 1994-11-25 1997-01-03 Thomson Csf READING DEVICE AND SYSTEM
JP2907058B2 (en) 1995-04-21 1999-06-21 富士ゼロックス株式会社 Image sensor having storage means and image reading device
KR0161886B1 (en) 1995-07-22 1998-12-15 문정환 Ccd defect compensating apparatus
US5610403A (en) 1995-09-05 1997-03-11 General Electric Company Solid state radiation imager with gate electrode plane shield wires
KR970049856A (en) 1995-12-30 1997-07-29 김광호 Sensor distance correction method and circuit in an image reading device having a plurality of licensors
JP3755921B2 (en) 1996-02-29 2006-03-15 株式会社コダックデジタルプロダクトセンター Line noise elimination method for imaging device and line noise elimination apparatus using the same
JP3581477B2 (en) 1996-03-04 2004-10-27 株式会社リコー Digital copier
JPH09298647A (en) 1996-05-01 1997-11-18 Fuji Photo Film Co Ltd Offset level correction method for linear image sensor and device therefor
JP3809226B2 (en) 1996-06-06 2006-08-16 富士写真フイルム株式会社 Correction method of output image signal of linear image sensor
JP3472044B2 (en) 1996-08-02 2003-12-02 キヤノン株式会社 Image reading device
JPH1093762A (en) 1996-09-18 1998-04-10 Fuji Photo Film Co Ltd Image data storing method and device therefor
US6115147A (en) 1996-10-01 2000-09-05 Fuji Photo Film Co., Ltd. Image reading apparatus
JP3476331B2 (en) 1997-03-14 2003-12-10 株式会社東芝 Image processing apparatus and image processing method
US5881182A (en) 1997-05-12 1999-03-09 Eastman Kodak Company Adaptive process for removing streaks in digital images
JP3177187B2 (en) 1997-05-14 2001-06-18 株式会社東芝 Correction device, correction method, image reading device, and image forming device
JP3762049B2 (en) 1997-06-27 2006-03-29 キヤノン株式会社 IMAGING DEVICE, IMAGING METHOD, AND RECORDING MEDIUM CONTAINING THE IMAGING METHOD
US6665454B1 (en) 1997-07-15 2003-12-16 Silverbrook Research Pty Ltd Dot adjacency compensation in optical storage systems using ink dots
JPH11215298A (en) 1998-01-22 1999-08-06 Toshiba Corp Image information processing unit, image information processing method and image forming device
US6034795A (en) 1998-03-02 2000-03-07 Contex A/S High precision color scanner
US6507364B1 (en) 1998-03-13 2003-01-14 Pictos Technologies, Inc. Edge-dependent interpolation method for color reconstruction in image processing devices
TW404120B (en) 1998-03-17 2000-09-01 Matsushita Electric Ind Co Ltd Image reading apparatus
JP3451195B2 (en) 1998-05-28 2003-09-29 富士写真フイルム株式会社 Image reading device
US6316761B1 (en) 1998-11-20 2001-11-13 Fuji Photo Film Co., Ltd. Image reading method having reading conditions different in light quantity
US6330081B1 (en) 1998-11-20 2001-12-11 Agfa Corporation Crosstalk cancellation in a multi-color CCD signal processor
JP4097815B2 (en) 1998-11-24 2008-06-11 株式会社リコー Image processing apparatus and image processing method
US6646681B1 (en) 1999-04-14 2003-11-11 Intel Corporation Method for reducing row noise from images
JP2001016399A (en) 1999-04-28 2001-01-19 Seiko Epson Corp Image reader
JP2001201324A (en) 2000-01-20 2001-07-27 Minolta Co Ltd Shape measuring device
US7203379B1 (en) 2000-09-29 2007-04-10 Ess Technology, Inc. Digital image cross talk correction
US6894812B1 (en) 2000-10-31 2005-05-17 Hewlett-Packard Development Company, L.P. Photosensor assembly with shared structures
JP2002151669A (en) 2000-11-14 2002-05-24 Toshiba Corp X-ray imaging device
TW520595B (en) 2001-06-08 2003-02-11 Veutron Corp Scanner device and method to save the compensation RAM
US7006686B2 (en) 2001-07-18 2006-02-28 Hewlett-Packard Development Company, L.P. Image mosaic data reconstruction

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326258A (en) * 1980-01-31 1982-04-20 Ncr Canada Ltd - Ncr Canada Ltee Method and apparatus for reducing the gray scale resolution of a digitized image
US5014333A (en) * 1988-07-21 1991-05-07 Eastman Kodak Company Image processor with smooth transitioning between dither and diffusion processes
US5404233A (en) * 1990-08-28 1995-04-04 Kyocera Corporation Method for smoothing image
US5031227A (en) * 1990-09-27 1991-07-09 Loral Aerospace Corp. Edge enhancement and smoothing in digital images
US6205248B1 (en) * 1991-10-03 2001-03-20 Ncr Corporation Method and system for compressing data in a multi-channel image processing system
US6212303B1 (en) * 1991-10-03 2001-04-03 Ncr Corporation Method and module system for high speed processing of item images
US6233011B1 (en) * 1997-02-15 2001-05-15 Acer Peripherals, Inc. Apparatus and method for compensating image being sensed
USRE40179E1 (en) * 1998-08-31 2008-03-25 Lg Electronics Inc. Method of image filtering based on successive pixels
US6674903B1 (en) * 1998-10-05 2004-01-06 Agfa-Gevaert Method for smoothing staircase effect in enlarged low resolution images
US7177482B2 (en) * 1999-12-16 2007-02-13 Sony Corporation Boundary line detection apparatus and method, and image processing apparatus and method as well as recording medium
US20020085217A1 (en) * 2000-12-28 2002-07-04 Eiichi Sakaue Image processing apparatus and image processing system
US20030048958A1 (en) * 2001-05-29 2003-03-13 Kazuhiro Ishiguro Image processing apparatus, image processing method, and computer program product therefor
US20040096099A1 (en) * 2002-11-19 2004-05-20 Realtek Semiconductor Corp. Apparatus for reducing zipper of image and method thereof

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