公开(公告)号：EP1307039A3

公开(公告)日：2005-09-14

申请号：EP02257427.1

申请日：2002-10-25

Applicant: Ricoh Company, Ltd.

Inventor： Fukuda, Hiroaki ,  Miyazaki, Shinya ,  Namizuka, Yoshiyuki ,  Wakahara, Shinichi ,  Baba, Hiroyuki ,  Okimoto, Morihiko

IPC: H04N1/409 ,  H04N1/04

CPC classification number: H04N1/4097 ,  H04N1/04 ,  H04N1/0461 ,  H04N1/19 ,  H04N1/401 ,  H04N2201/046

Abstract: An image processing apparatus and an image scanning apparatus detect a position of an abnormal pixel caused by obstruction to reflected light from a manuscript due to dust and others and correct the abnormal pixel by using data of normal pixels surrounding the abnormal pixel on the basis of a result of the detection. Based on image data read from a null-image prior to optical reading of a manuscript, an abnormal pixel detecting part detects the position of the abnormal pixel caused by the dust and others lying on a contact glass equipped between the manuscript and a CCD. An abnormal pixel correcting part uses pixel information at the position of the abnormal pixel detected by the abnormal pixel detecting part to correct image data read from the manuscript.

公开(公告)号：EP1014146A3

公开(公告)日：2001-10-31

申请号：EP99204237.4

申请日：1999-12-10

Applicant: EASTMAN KODAK COMPANY

Inventor： Hoeft, Jon L., Eastman Kodak Company

IPC: G02B26/12 ,  G06K15/12 ,  H04N1/04

CPC classification number: G01D5/26 ,  H04N2201/046

Abstract: A method and apparatus for detecting a scanning light beam used for writing onto a media. A detector is disposed in the scanning path for sending a signal to a first amplifier. A second amplifier is provided for providing a feed back loop to the first amplifier so as to maintain the first amplifier a predetermined level. A time delay circuit provided between the output of the second amplifier and first amplifier for delaying the signal from said second amplifier to said positive input of said first amplifier such that the output of the first amplifier is forced to a predetermined value when no signal is being produced by the detector.

Abstract translation: 一种用于检测用于写入到介质上的扫描光束的方法和装置。 检测器在扫描路径设置为将信号发送到第一放大器。 的第二放大器提供了用于提供一个反馈循环到第一放大器，以便保持所述第一放大器的预定水平。 用于从所述第二放大器的信号延迟到检查做的第一放大器的输出和所述第一放大器的所述正输入端的第二放大器的输出端和第一放大器之间设置有时间延迟电路被强制到一个预定值。当没有信号被 由检测器产生。

公开(公告)号：EP0763762A1

公开(公告)日：1997-03-19

申请号：EP96103991.4

申请日：1996-03-13

Applicant: Hewlett-Packard Company

Inventor： Lawton, Robert J. ,  Marshall, Daniel R.

IPC: G02B26/12 ,  G06K15/12 ,  H04N1/047 ,  G06T9/20

CPC classification number: H04N1/047 ,  G02B26/127 ,  G06K15/1223 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/03154 ,  H04N2201/0458 ,  H04N2201/046 ,  H04N2201/0471 ,  H04N2201/04722 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04734 ,  H04N2201/04744 ,  H04N2201/0476 ,  H04N2201/04791 ,  H04N2201/04794

Abstract: A system and method (10) of deflecting a laser beam (20) in a laser printer for providing enhanced resolution and reduced banding effects. Specifically, to enhance resolution, the laser beam is deflected from a white space area adjacent an image to double resolution at the edges of the image. Similarly, banding is reduced by deflecting the beam to compensate for drum rotational and translational errors. The beam is deflected using an electro-optic modulator (25) placed between the laser diode (15) and the scanning mirror (30). Encoders (55,60) detect drum rotational errors and motion between the optics unit and the drum to provide a closed loop feedback system for reducing banding.

Abstract translation: 一种系统和偏转中的激光打印机的激光束（20），用于提供增强的分辨率的方法（10）和降低的条带效应。 具体地，为了提高分辨率，在激光束从一个空白区域的相邻于在图像的边缘双分辨率的图像偏转。 类似地，条带是由偏转光束，以补偿鼓的旋转和平移误差减少。 梁是使用激光二极管（15）和所述扫描镜（30）之间放置电光调制器（25）的偏转。 编码器（55,60）检测光学单元，并提供一种闭环反馈系统用于减少绑扎鼓之间鼓旋转误差和运动。

公开(公告)号：EP0528555A2

公开(公告)日：1993-02-24

申请号：EP92306870.4

申请日：1992-07-28

Applicant: XEROX CORPORATION

Inventor： Yang, Eugene L. ,  O'Leary, James B.

IPC: G03G15/04 ,  H04N1/23

CPC classification number: H04N1/0473 ,  G03G15/5033 ,  G03G2215/00075 ,  G06K15/1219 ,  H04N1/1135 ,  H04N1/12 ,  H04N2201/02439 ,  H04N2201/02441 ,  H04N2201/046 ,  H04N2201/0471 ,  H04N2201/04724 ,  H04N2201/04734 ,  H04N2201/04756 ,  H04N2201/04763 ,  H04N2201/04794 ,  H04N2201/04796

Abstract: Correction of image distortion in a reproduction machine due to vibrational or speed distortions in or between a moving photoreceptor (22) and an imaging device (30) projecting raster lines on the photoreceptor as it moves past the imaging device, utilizing an encoder (60) for sensing the speed of the photoreceptor and also the relative vibrational motion between the photoreceptor and the imaging device and providing electrical signals to a signal separator separating the electrical signals into lower and higher frequency signals (74,76); and a servo motor (24) for driving the photoreceptor and compensating for the lower frequency increases or decreases in the speed of the photoreceptor, the servo motor being driven by the separated lower frequency signals; and an optical system (90) for pivoting the projected raster lines to compensate for the image distortions which are of the higher frequencies, the optical system (90) being driven by the higher frequency signals from the signal separator.

Abstract translation: 由于在移动的感光体（22）和成像装置（30）之间或之间由于振动或速度失真而在感光体上移动通过成像装置时的光栅线上的图像失真的校正，利用编码器（60） 用于感测感光体的速度以及感光体和成像装置之间的相对振动运动，并将电信号提供给将电信号分离成较低和较高频率信号的信号分离器（74,76）; 以及用于驱动感光体并补偿较低频率的伺服电动机（24）增加或减小感光体的速度，伺服电动机由分离的较低频率信号驱动; 以及光学系统（90），用于枢转投影光栅线以补偿具有较高频率的图像失真，光学系统（90）由来自信号分离器的较高频率信号驱动。

公开(公告)号：KR1020050076169A

公开(公告)日：2005-07-26

申请号：KR1020040004000

申请日：2004-01-19

Applicant: 삼성전자주식회사

Inventor： 오종철

IPC: H04N1/40

CPC classification number: H04N1/00814 ,  H04N1/00976 ,  H04N1/04 ,  H04N2201/046

Abstract: 스캔이미지 보정장치 및 그 보정방법이 개시된다. 본 발명에 따른 스캔이미지 보정장치는, 원고로부터 소정 블록단위로 이미지를 스캐닝하여 스캔이미지를 독출하는 스캐닝부, 스캐닝부에 의한 스캔이미지의 독출 중에 외부로부터 유입된 ESD의 영향이 있는지를 판단하는 ESD유입 판단부, ESD유입 판단부에 의해 ESD의 영향이 있는 것으로 판단되면, 스캐닝부에 의한 스캔이미지의 재독출이 일어나도록 원고를 소정 블록단위만큼 백피딩시키는 원고피딩 조절부, 및 원고피딩 조절부에 의해 피딩이 조절된 원고로부터 ESD의 영향이 없는 스캔이미지를 독출하여 이미지처리하는 이미지 처리부를 구비한다. 이로써, 스캔이미지 보정장치는 스캐닝 도중에 유입되는 ESD의 영향에 의한 흑선의 발생을 방지할 수 있게 되어 품질이 우수한 스캔이미지를 생성할 수 있게 된다.

公开(公告)号：US20100195930A1

公开(公告)日：2010-08-05

申请号：US12363909

申请日：2009-02-02

Applicant: Eliud ROBLES-FLORES ,  Dale MASHTARE

Inventor： Eliud ROBLES-FLORES ,  Dale MASHTARE

IPC: G06K9/40 ,  H04N1/409

CPC classification number: G06K9/40 ,  G06T5/002 ,  H04N1/00013 ,  H04N1/00994 ,  H04N1/2307 ,  H04N1/2346 ,  H04N1/409 ,  H04N2201/046

Abstract: Provided are devices, systems and methods that improve image quality by identifying and addressing image noise caused by electrical noise. Electrical noise emanating from a plurality of components of an image apparatus is identified, producing an electrical noise detection calculation based on the detected electrical noise, and inputting the electrical noise detection calculation into an image noise correction calculation apparatus, calculating an image noise correction calculation.

Abstract translation: 提供了通过识别和寻址由电噪声引起的图像噪声来改善图像质量的装置，系统和方法。 识别从图像装置的多个部件发出的电噪声，基于检测到的电噪声产生电噪声检测计算，并将电噪声检测计算输入到图像噪声校正计算装置中，计算图像噪声校正计算。

公开(公告)号：US20040201704A1

公开(公告)日：2004-10-14

申请号：US09922252

申请日：2001-08-03

Inventor： Jen-Shou Tseng ,  Cheng-Kuei Chen

IPC: H04N005/228

CPC classification number: H04N1/10 ,  G02B27/646 ,  H04N1/19 ,  H04N2201/046

Abstract: A vibration compensation device for an optical image scanner. The optical scanner has a platform for holding a scan document, an optical system and a light-sensing device. The compensation device includes a vibration sensor, a controller and an actuator. The vibration sensor mounts on the light-sensing device for detecting magnitude of vibration. The controller connects with the vibration sensor for measuring vibration in the light-sensing device and producing a corresponding actuator signal. The actuator links independently with the controller and the optical system for adjusting the optical system through the actuator according to the actuator signal so that the overall effects caused by vibration are reduced.

Abstract translation: 一种用于光学图像扫描器的振动补偿装置。 光学扫描器具有用于保持扫描文档，光学系统和光感测装置的平台。 补偿装置包括振动传感器，控制器和致动器。 振动传感器安装在感光装置上，用于检测振动的大小。 控制器与振动传感器连接，用于测量光感测装置中的振动，并产生相应的执行器信号。 执行器与控制器和光学系统独立地连接，用于根据致动器信号通过致动器调节光学系统，使得由振动引起的整体效果降低。

公开(公告)号：US20040184118A1

公开(公告)日：2004-09-23

申请号：US10388619

申请日：2003-03-17

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Tetsuya Sato

IPC: H04N001/04

CPC classification number: H04N1/1026 ,  H04N1/1013 ,  H04N1/103 ,  H04N2201/046

Abstract: An image reading apparatus of the present invention can suppress an image distortion caused by the vibration of a carriage by varying at least one of the level of a current supplied to a drive motor in accordance with a variation of an environmental temperature and an acceleration distance.

Abstract translation: 本发明的图像读取装置可以通过根据环境温度和加速距离的变化改变提供给驱动马达的电流的电平中的至少一个来抑制由滑架的振动引起的图像失真。

公开(公告)号：US06590598B2

公开(公告)日：2003-07-08

申请号：US09793907

申请日：2001-02-28

Applicant: Kenichi Kodama

Inventor： Kenichi Kodama

IPC: B41J2435

CPC classification number: H04N1/1912 ,  B41J2/47 ,  B41J11/42 ,  H04N1/12 ,  H04N1/128 ,  H04N2201/0458 ,  H04N2201/046

Abstract: On a basis of a frequency analysis of the irregularities in density caused by a subscanning direction feed amount error of an exposure head, subscanning direction intervals between LEDs of the exposure head within the image forming apparatus are unequal such that the irregularities in density generated in an image is generated in high frequency area with a spatial frequency of at least 1 lp/mm. By using such image forming apparatus, an image is formed in which the irregularities in density is sufficiently suppressed in low frequency area with the spatial frequency of less than 1 lp/mm. Even if the irregularities in density is relatively large in high spatial frequency area, human eyes are difficult to view the irregularities in density thus the image quality can be improved.

Abstract translation: 基于由曝光头的副扫描方向进给量误差引起的密度不均匀性的频率分析的基础，图像形成装置内的曝光头的LED之间的副扫描方向间隔不相等，使得在 图像在空间频率至少为1lp / mm的高频区域中产生。 通过使用这种图像形成装置，形成在空间频率小于1lp / mm的低频区域中充分抑制密度不规则的图像。 即使高空间频率区域的密度不均匀性相对较大，人眼难以观察密度的不规则性，因此可以提高图像质量。

公开(公告)号：US20010017647A1

公开(公告)日：2001-08-30

申请号：US09793907

申请日：2001-02-28

Inventor： Kenichi Kodama

IPC: B41J002/47 ,  H04N001/40

CPC classification number: H04N1/1912 ,  B41J2/47 ,  B41J11/42 ,  H04N1/12 ,  H04N1/128 ,  H04N2201/0458 ,  H04N2201/046

Abstract: On a basis of a frequency analysis of the irregularities in density caused by a subscanning direction feed amount error of an exposure head, subscanning direction intervals between LEDs of the exposure head within the image forming apparatus are unequal such that the irregularities in density generated in an image is generated in high frequency area with a spatial frequency of at least 1 lp/mm. By using such image forming apparatus, an image is formed in which the irregularities in density is sufficiently suppressed in low frequency area with the spatial frequency of less than 1 lp/mm. Even if the irregularities in density is relatively large in high spatial frequency area, human eyes are difficult to view the irregularities in density thus the image quality can be improved.

Abstract translation: 基于由曝光头的副扫描方向进给量误差引起的密度不均匀性的频率分析的基础，图像形成装置内的曝光头的LED之间的副扫描方向间隔不相等，使得在 图像在空间频率至少为1lp / mm的高频区域中产生。 通过使用这种图像形成装置，形成在空间频率小于1lp / mm的低频区域中充分抑制密度不规则的图像。 即使高空间频率区域的密度不均匀性相对较大，人眼难以观察密度的不规则性，因此可以提高图像质量。