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    Black-level feedback device, image reading device, and black-level feedback control method
    91.
    发明公开
    Black-level feedback device, image reading device, and black-level feedback control method 有权
    Schwarzpegel-Feedbackvorrichtung，Bildlesevorrichtung und Verfahren zur Kontrolle des Schwarzpegel-Feedbacks

    公开(公告)号：EP1835724A2

    公开(公告)日：2007-09-19

    申请号：EP07251145.4

    申请日：2007-03-19

    Applicant: Ricoh Company, Ltd.

    Inventor： Tsukahara, Hajime

    IPC: H04N1/407

    CPC classification number: H04N1/407 ,  H04N1/1013 ,  H04N2201/044

    Abstract: A first set-value calculating unit (161) calculates a first set value of a black-level feedback based on a reflection amount that increases a speed of tracking to a black-level target value in a black-level feedback control. A second set-value calculating unit (162) calculates a second set value of a black-level feedback based on a reflection amount that slows down a tracking to a black-level target value as compared to the speed of tracking of the first set-value calculating unit (161). A selecting unit (164) selects and outputs any one of the first set value and the second set value and outputs selected value as a set value. A controlling unit (163) controls selection of any one of the first set value and the second set value by the selecting unit (164) based on the black differential value and a gain of the image data.

    Abstract translation: 第一设定值计算单元（161）基于在黑电平反馈控制中将追踪速度提高到黑电平目标值的反射量来计算黑电平反馈的第一设定值。 第二设定值计算单元（162）与第一设定值计算单元（162）的跟踪速度相比，基于将跟踪减慢到黑电平目标值的反射量来计算黑电平反馈的第二设定值。 值计算单元（161）。 选择单元（164）选择并输出第一设定值和第二设定值中的任一个，并输出所选择的值作为设定值。 控制单元（163）基于黑色差分值和图像数据的增益来控制由选择单元（164）对第一设定值和第二设置值中的任何一个的选择。

    Document scanning apparatus with white reference
    92.
    发明公开
    Document scanning apparatus with white reference 审中-公开
    文档扫描白色参考

    公开(公告)号：EP1467553A3

    公开(公告)日：2006-03-15

    申请号：EP03257965.8

    申请日：2003-12-17

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Nam, Dong-su

    IPC: H04N1/407

    CPC classification number: H04N1/1215 ,  H04N1/193 ,  H04N1/4076 ,  H04N2201/044 ,  H04N2201/0458

    Abstract: An image scanning unit includes an image sensor unit (111) disposed along a document delivery path and having an image scanning surface over which a document travels, the image scanning surface opposing a first surface of the document, a white member which contacts a second side opposing the first side of the document and to urge the document toward the image sensor unit (111), a surface of the white member opposing the image sensor unit being white in color, and a drive roller (130) disposed along the document delivery path adjacent to the white member, delivering the document between the image sensor unit (111) and the white member, and contacting the second side of the document.

    Apparatus and method for controlling the reading operation of a reference white plate in an image reading device having a sheet-through mechanism
    93.
    发明公开
    Apparatus and method for controlling the reading operation of a reference white plate in an image reading device having a sheet-through mechanism 有权
    装置和方法，用于控制在包括牵开器的图像读取装置读取白色基准板

    公开(公告)号：EP1261193A1

    公开(公告)日：2002-11-27

    申请号：EP02010230.7

    申请日：2002-05-16

    Applicant: Ricoh Company, Ltd.

    Inventor： Yoshihiro Sakai c/o Ricoh Company, Ltd.

    IPC: H04N1/10

    CPC classification number: H04N1/1008 ,  H04N1/1013 ,  H04N1/193 ,  H04N2201/044 ,  H04N2201/04755

    Abstract: In an image reading device (50) having a sheet-through mechanism, a controller (21) controls a stepping motor (8) to decelerate an image reading system (1, 2) when the image reading system (1, 2) is moved to a reference white plate reading position, and controls a stepping motor drive electric current to decrease when the image reading system (1, 2) reads a reference white plate (22). When the image reading system (1, 2) finishes reading the reference white plate (22), the controller (21) controls the stepping motor drive electric current to increase so as to rapidly decelerate the image reading system (1, 2). The controller (21) further controls the stepping motor (8) such that a moving speed of the image reading system (1, 2) to an original document reading position is lower than a moving speed of the image reading system (1, 2) to the reference white plate reading position.

    Abstract translation: 在具有片材通过机构，控制器（21）的图像读取设备（50）控制的步进马达（8），以减速的图像读取系统（1，2）当所述图像读取系统（1，2）被移动 到基准白色板读取位置，并控制步进电动机的驱动电流以减小当图像读取系统（1，2）读取基准白色板（22）。 当图像读取系统（1，2）完成读取基准白色板（22），所述控制器（21）控制所述步进电机的驱动电流增加，以便迅速减速图像读取系统（1，2）。 该控制器（21）进一步控制该步进电机（8）搜索做的图像读取系统的移动速度（1,2）到原稿读取位置的比图像读取系统的移动速度低（1，2） 到基准白色板读取位置。

    Method and system for calibrating a look-down linear array scanner utilizing a folded optical path
    95.
    发明公开
    Method and system for calibrating a look-down linear array scanner utilizing a folded optical path 审中-公开
    用于校准具有光路缺口线性Aufsichtabtasters方法和装置

    公开(公告)号：EP1176798A2

    公开(公告)日：2002-01-30

    申请号：EP01305517.3

    申请日：2001-06-26

    Applicant: Hewlett-Packard Company

    Inventor： Gann, Robert G.

    IPC: H04N1/19

    CPC classification number: H04N1/0303 ,  H04N1/03 ,  H04N1/0305 ,  H04N1/19 ,  H04N2201/02497 ,  H04N2201/0436 ,  H04N2201/044

    Abstract: A system and method are disclosed which provide a look-down digital imaging device 300 capable of scanning a calibration area 314 included within such look-down digital imaging device to capture image data for the calibration area and calibrate itself based on analysis of such captured image data. More specifically, a preferred embodiment includes a calibration area that is integrated internally within the look-down digital imaging device. When performing calibration in such a preferred embodiment, the scan head 304 of the look-down digital imaging device is operable to align itself with the calibration area to allow for a scan of the calibration area (i.e., the capture of digital image data of the calibration area). In one embodiment, a look-down digital imaging device does not achieve a focused scan of the calibration area, but is capable of utilizing captured unfocused digital imaging data for calibration. In a preferred embodiment, a look-down digital imaging device achieves a focused scan of the calibration area, thereby enabling a further accurate calibration. More specifically, a preferred embodiment folds the optical path of the reflected light 322 A from the calibration area in order to have the optical path of such calibration area accurately mimic the optical path of an original to be scanned, thereby allowing for focused calibration to be achieved.

    Abstract translation: 一种系统和方法，光盘游离缺失，其提供一个下视数字成像装置300能够扫描包括搜索下视数字成像设备内的校准区域314根据搜索拍摄图像的分析来捕获图像数据的校正区域和校准本身的 数据。 更具体地，优选实施例包括校准区域并在所述下视的数字成像装置内的内部集成。 当在寻求一优选实施例中，扫描头的下视数字成像设备304是可操作的以对准本身与校准区域，以允许所述校准区域的扫描（执行校准即，数字图像数据的捕获 校准区域）。 在一个，实施例的查找向下数字成像装置没有实现校准区域的聚焦扫描，而是能够利用捕获未聚焦的数字成像数据进行校准的。 在优选实施例中，下视数字成像装置实现所述校准区域的聚焦扫描，从而能够的进一步精确校准。 更具体地，优选的实施方式折叠，以便有准确地设定模拟原始的光路求校准区的光路从所述校准区域的反射光322A的光路进行扫描，从而允许聚焦的校准来实现 ，

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