Method and apparatus for indicating a field of view for a document camera
    72.
    发明公开
    Method and apparatus for indicating a field of view for a document camera 有权
    Verfahren und Vorrichtung zur Indikation des Blickfeldes einer Dokument-Kamera

    公开(公告)号:EP1453297A1

    公开(公告)日:2004-09-01

    申请号:EP04012976.9

    申请日:2001-11-06

    Abstract: A document camera is described for capturing an electronic image of a document, for subsequent optical character recognition. In order to avoid the need for a user to look through a viewfinder of the camera, the camera comprises a projector for projecting an optical field of view indicator on to the document. The user can see the projected indicator on the document page, indicating the effective field of view of the camera. The camera may include auto-focus and zooming mechanisms. In one form, the camera processes a detected image to determine a capture zone corresponding to whole regions of the document falling entirely within the field of view. The projected indicator is controlled to indicate only the capture zone. When the image is to be captured, the camera zooms in to the capture zone to capture the image at maximum resolution.

    Abstract translation: 描述了用于捕获文档的电子图像的文档照相机,用于随后的光学字符识别。 为了避免用户需要通过相机的取景器观看,摄像机包括用于将光学视场指示器投影到文档上的投影仪。 用户可以在文档页面上看到投影指示,指示相机的有效视场。 相机可能包括自动对焦和缩放机制。 在一种形式中,相机处理检测到的图像以确定与完全落在视场内的文档的整个区域相对应的捕获区域。 控制投影指示器仅指示捕获区域。 当要拍摄图像时,相机将放大到拍摄区域以最大分辨率拍摄图像。

    Method and apparatus for indicating a field of view for a document camera
    73.
    发明公开
    Method and apparatus for indicating a field of view for a document camera 有权
    用于指示的视图文件摄像机领域的方法和装置

    公开(公告)号:EP1205790A2

    公开(公告)日:2002-05-15

    申请号:EP01125489.3

    申请日:2001-11-06

    Abstract: A document camera is described for capturing an electronic image of a document, for subsequent optical character recognition. In order to avoid the need for a user to look through a viewfinder of the camera, the camera comprises a projector for projecting an optical field of view indicator on to the document. The user can see the projected indicator on the document page, indicating the effective field of view of the camera. The camera may include auto-focus and zooming mechanisms. In one form, the camera processes a detected image to determine a capture zone corresponding to whole regions of the document falling entirely within the field of view. The projected indicator is controlled to indicate only the capture zone. When the image is to be captured, the camera zooms in to the capture zone to capture the image at maximum resolution.

    Self-referencing start of plot system and method
    75.
    发明公开
    Self-referencing start of plot system and method 失效
    的系统和方法的自设置的曲线图的开始时的参考。

    公开(公告)号:EP0433910A2

    公开(公告)日:1991-06-26

    申请号:EP90124233.9

    申请日:1990-12-14

    Inventor: Frese, Dale

    Abstract: A start of plot mark (111) consists of three portions, a first (111a), second (111b) and third (111c) portion each of equal area with the first and third portions being above a reference line (114) and spaced from each other by the second portion which is below the reference line. The first and second portions are used to generate a reference signal for use in measuring the zero crossing of the output signal from the start of plot mark thereby to automatically compensate for uncertainties in the zero crossing such as those uncertainties produced by differences in intensities of the start of plot coloration versus the background coloration of the print medium, differences in reflectivity and illumination of the print medium, and imbalances between sensor output signals.

    Abstract translation: 情节标记的开始三个部分的besteht,每个面积相等的与所述第一和第二部分作为基准线的上方,并通过所述第二部分的所有作为基准线下方彼此间隔开的第一,第二和第三部分。 所述第一和第二部分是用来产生用于从情节标记的开始测量的零交叉的输出信号的使用的参考信号,从而自动地补偿在过零点不确定性:诸如通过差异的强度产生的那些不确定性 开始情节着色相对于打印介质,传感器的输出信号之间在反射率和打印介质的照​​明的差别,和不平衡的背景着色。

    Image scanner
    80.
    发明专利

    公开(公告)号:JP4784788B2

    公开(公告)日:2011-10-05

    申请号:JP2009111275

    申请日:2009-04-30

    Inventor: 吉記 刑部

    Abstract: A scanning device is provided with a first transparent plate on which an original sheet to is placed, the original sheet being scanned statically, a reading unit arranged below the first transparent plate and configured to scan an image on the original sheet in the main scanning direction, the reading unit being movable in an auxiliary scanning direction, and a first reference member defining a reference position for scanning an image on the original sheet, in the main scanning direction and in the auxiliary scanning direction. The first reference member is arranged at an unused area of the first transparent plate, the unused area being an area which is within the original sheet placeable area on the first transparent plate and is not covered with original sheets of a plurality of predetermined different sizes placed on the first transparent plate with being positioned with respect to a predetermined positioning point.

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