公开(公告)号：EP0772156A3

公开(公告)日：1998-07-08

申请号：EP96307858

申请日：1996-10-30

Applicant: XEROX CORP

Inventor： BANTON MARTIN E

IPC: B41J2/44 ,  B41J2/45 ,  B41J2/455 ,  B41J5/30 ,  G06F3/12 ,  G06T3/60 ,  H04N1/387

CPC classification number: G06T3/606

Abstract: Described herein is a method and apparatus for consistently rotating high addressability bitmap images to be rendered on a printing system. A first step encodes the high addressability image to produce a regular bitmap array and then rotates the regular array. A compact dot growth operation is applied to assure that exposure pulses for any gray pixels are consistently positioned to provide a consistent output which is independent of the rotation direction.

公开(公告)号：CA2471386C

公开(公告)日：2010-02-16

申请号：CA2471386

申请日：2004-06-18

Applicant: XEROX CORP

Inventor： JACOBS WILLIAM S ,  BANTON MARTIN E ,  ROBINSON DAVID C ,  MOORE JOHN A

IPC: H04N1/00 ,  H04N1/405 ,  H04N1/333 ,  H04N1/40 ,  H04N1/64

Abstract: A raster image path architecture having the capacity for supporting the rendering and output of a device-independent grayscale raster image, while also offering the capacity for supporting the rendering and output of a device-dependent binary raster image, thus offering the advantages of outputting a device-independent grayscale raster image while preserving the performance and image quality advantages of a conventional binary raster image path architecture.

公开(公告)号：DE69618901T2

公开(公告)日：2002-07-11

申请号：DE69618901

申请日：1996-10-30

Applicant: XEROX CORP

Inventor： BANTON MARTIN E

IPC: B41J2/44 ,  B41J2/45 ,  B41J2/455 ,  B41J5/30 ,  G06F3/12 ,  G06T3/60 ,  H04N1/387

Abstract: Described herein is a method and apparatus for consistently rotating high addressability bitmap images to be rendered on a printing system. A first step encodes the high addressability image to produce a regular bitmap array and then rotates the regular array. A compact dot growth operation is applied to assure that exposure pulses for any gray pixels are consistently positioned to provide a consistent output which is independent of the rotation direction.

公开(公告)号：CA2077293A1

公开(公告)日：1993-03-10

申请号：CA2077293

申请日：1992-09-01

Applicant: XEROX CORP

Inventor： LOCE ROBERT P ,  BANTON MARTIN E ,  SWANBERG MELVIN E ,  LAMA WILLIAM L ,  CIANCIOSI MICHAEL S ,  FETH SUSAN E ,  GARCIA KEVIN J ,  WU PETER K ,  GIRMAY GIRMAY K

IPC: G02B26/10 ,  G02B26/12 ,  G02F1/33 ,  G03G15/01 ,  G06K15/12 ,  H04N1/113 ,  H04N1/40 ,  H04N1/46 ,  H04N1/21

公开(公告)号：DE69220742D1

公开(公告)日：1997-08-14

申请号：DE69220742

申请日：1992-08-12

Applicant: XEROX CORP

Inventor： LOCE ROBERT P ,  CIANCIOSI MICHAEL S ,  WU PETER K ,  BANTON MARTIN E ,  FETH SUSAN E ,  GIRMAY GIRMAY K ,  LAMA WILLIAM L ,  GARCIA KEVIN J ,  SWANBERG MELVIN E

IPC: B41J2/44 ,  G02B26/10 ,  G02B26/12 ,  G06K15/12 ,  H04N1/113 ,  H04N1/40

Abstract: A pulsed imaging Raster Output Scanner utilizes pulse width modulation in conjunction with spatial filtering to form three exposure levels at the surface of a recording medium, one of the levels associated with a specific color. In a specific non-facet tracked scanner system, a light beam (84) from a laser source (82) is modulated, by an acousto-optic modulator (92), in accordance with a video signal supplied to the modulator by a control circuit (94). An anamorphic lens system (108) performs a Fourier transform on the modulated beam which is then filtered by a spatial bandpass filter (136) before being directed, by a rotating polygon scanner (142), across the recording medium (162).

公开(公告)号：CA2077293C

公开(公告)日：1997-03-25

申请号：CA2077293

申请日：1992-09-01

Applicant: XEROX CORP

Inventor： LOCE ROBERT P ,  BANTON MARTIN E ,  SWANBERG MELVIN E ,  LAMA WILLIAM L ,  CIANCIOSI MICHAEL S ,  FETH SUSAN E ,  GARCIA KEVIN J ,  WU PETER K ,  GIRMAY GIRMAY K

IPC: G02B26/10 ,  G02B26/12 ,  G02F1/33 ,  G03G15/01 ,  G06K15/12 ,  H04N1/113 ,  H04N1/40 ,  H04N1/46 ,  H04N1/21

Abstract: A pulsed imaging, facet tracked, Raster Output Scanner utilizes pulse width modulation in conjunction with spatial filtering to form three exposure levels at the surface of a charged photoreceptor medium, one of the levels associated with a specific color. This type of scanner with a nominal video rendering experiences a color line growth in the process direction. The line growth problem is caused by a coherent optical effect. The resultant output print has bolded color lines in the process direction. Several techniques are set forth to compensate for this line growth. In a preferred technique, the video data stream is modified by locating or positioning video pulses representing white information at the start of an associated pixel time period. When the color pixel is imaged, it will therefore, always abut an adjoining white pulse and will be inhibited from spreading into the adjacent pixel period. Other techniques rely upon inversion of white pulses, or separation of white pulses into two signals, each segment moved to the beginning and the end of the associated pixel period. According to another technique, the input data stream is buffered and pixel groups examined to identify neighboring white and color signals. These signals are then either narrowed or in the case of a sequence of color signals, the lead and trail edge of the color signals are trimmed.

公开(公告)号：MX9204581A

公开(公告)日：1993-03-01

申请号：MX9204581

申请日：1992-08-07

Applicant: XEROX CORP

Inventor： LOCE ROBERT P ,  BANTON MARTIN E ,  SWANBERG MELVIN E ,  LAMA WILLIAM L ,  CIANCIOSI MICHAEL S ,  FETH SUSAN E ,  GARCIA KEVIN J ,  WU PETER K ,  GIRMAY GIRMAY K

IPC: G02B26/10 ,  G02B26/12 ,  G02F1/33 ,  G03G15/01 ,  G06K15/12 ,  H04N1/113 ,  H04N1/40 ,  H04N9/10

公开(公告)号：BR9605397A

公开(公告)日：1998-07-28

申请号：BR9605397

申请日：1996-10-31

Applicant: XEROX CORP

Inventor： BANTON MARTIN E

IPC: B41J2/44 ,  B41J2/45 ,  B41J2/455 ,  B41J5/30 ,  G06F3/12 ,  G06T3/60 ,  H04N1/387 ,  G06K15/00

Abstract: Described herein is a method and apparatus for consistently rotating high addressability bitmap images to be rendered on a printing system. A first step encodes the high addressability image to produce a regular bitmap array and then rotates the regular array. A compact dot growth operation is applied to assure that exposure pulses for any gray pixels are consistently positioned to provide a consistent output which is independent of the rotation direction.

公开(公告)号：DE69220742T2

公开(公告)日：1998-01-15

申请号：DE69220742

申请日：1992-08-12

Applicant: XEROX CORP

Inventor： LOCE ROBERT P ,  CIANCIOSI MICHAEL S ,  WU PETER K ,  BANTON MARTIN E ,  FETH SUSAN E ,  GIRMAY GIRMAY K ,  LAMA WILLIAM L ,  GARCIA KEVIN J ,  SWANBERG MELVIN E

IPC: B41J2/44 ,  G02B26/10 ,  G02B26/12 ,  G06K15/12 ,  H04N1/113 ,  H04N1/40

Abstract: A pulsed imaging Raster Output Scanner utilizes pulse width modulation in conjunction with spatial filtering to form three exposure levels at the surface of a recording medium, one of the levels associated with a specific color. In a specific non-facet tracked scanner system, a light beam (84) from a laser source (82) is modulated, by an acousto-optic modulator (92), in accordance with a video signal supplied to the modulator by a control circuit (94). An anamorphic lens system (108) performs a Fourier transform on the modulated beam which is then filtered by a spatial bandpass filter (136) before being directed, by a rotating polygon scanner (142), across the recording medium (162).

公开(公告)号：CA2077377C

公开(公告)日：1996-12-10

申请号：CA2077377

申请日：1992-09-02

Applicant: XEROX CORP

Inventor： LOCE ROBERT P ,  BANTON MARTIN E ,  LAMA WILLIAM L ,  CIANCIOSI MICHAEL S ,  FETH SUSAN E ,  GARCIA KEVIN J ,  WU PETER K ,  GIRMAY GIRMAY K ,  SWANBERG MELVIN E

IPC: B41J2/44 ,  G02B26/10 ,  G02B26/12 ,  G06K15/12 ,  H04N1/113 ,  H04N1/40 ,  H04N1/46 ,  H04N1/04 ,  H04N1/23

Abstract: A pulsed imaging Raster Output Scanner utilizes pulse width modulation in conjunction with spatial filtering to form three exposure levels at the surface of a recording medium, one of the levels associated with a specific color.