Image processing method and device
    141.
    发明公开
    Image processing method and device 失效
    图像处理方法和装置

    公开(公告)号:EP0884890A1

    公开(公告)日:1998-12-16

    申请号:EP98303280.6

    申请日:1998-04-28

    Abstract: A method of reconstructing an image captured as a stream of image data, for example as input received from a linear sensor in unconstrained scanning, comprises reconstructing the image in the form of a plurality of tiles. Each tile comprises a pixel grid of predetermined dimension representing a specific spatial region of the image. The tiles tessellate a rectilinear image space. Tiles can be created when required and compressed when no longer active, thus minimizing memory requirements. Devices utilizing this method are provided. The method is especially appropriate for use in an unconstrained hand scanner, but can also be applied to panoramic capture with a digital camera.

    Abstract translation: 重建作为图像数据流捕获的图像的方法,例如作为在无约束扫描中从线性传感器接收的输入,包括以多个图块的形式重建图像。 每个图块包括代表图像的特定空间区域的预定维度的像素网格。 瓦片镶嵌直线图像空间。 瓷砖可以在需要时创建,不再活动时压缩,从而最大限度地减少内存需求。 提供了使用这种方法的设备。 该方法特别适用于无约束手持式扫描仪,但也可应用于数码相机的全景拍摄。

    Method and apparatus for locating the document referencing corner in a document scanner
    150.
    发明公开
    Method and apparatus for locating the document referencing corner in a document scanner 失效
    Verfahren und Vorrichtung zur Lokalisierung der Referenzierungsecke eines Dokuments in einem Dokumentabtaster。

    公开(公告)号:EP0441535A2

    公开(公告)日:1991-08-14

    申请号:EP91300778.7

    申请日:1991-01-31

    Abstract: A document (11) to be scanned is corner referenced on a transparent platen (12), with the document's image facing down. The platen defines an X-Y coordinate system matrix. A moving line of light (24) extends in the X direction and illuminates the document's image, line by line, as the line of light moves in the Y direction. The line of light that is thus reflected from the document is sensed by a linear CCD sensor array (27) having a large number of individual sensor cells (28) arranged in a line that effectively extends in the X direction. Each cell of the CCD array defines an individual pixel (PEL) within the line of light that is reflected from the document. A reflection target (54) is located at a known position relative to the platen's referencing corner, to be scanned prior to scanning the document. Sensing of the target enables (1) the X direction physical position of the CCD sensor array relative to the referencing corner to be accurately determined (86), and (2) the Y direction physical position of the line of light relative to the the referencing corner to be accurately determined (87), both parameters being determined prior to scanning of the document.

    Abstract translation: 要扫描的文件(11)在透明压板(12)上以角度为基准,文档的图像朝下。 压板定义了X-Y坐标系矩阵。 移动的光线(24)沿着X方向延伸,并沿着Y方向移动的光线逐行照射文件的图像。 由文件反射的光线由具有大量单个传感器单元(28)的线性CCD传感器阵列(27)感测,该传感器阵列布置成在X方向上有效地延伸的直线。 CCD阵列的每个单元限定从文档反射的光线内的单个像素(PEL)。 反射目标(54)位于相对于压板的参考角的已知位置,以在扫描文档之前进行扫描。 感测目标使得(1)CCD传感器阵列相对于参考角的X方向物理位置被准确地确定(86),和(2)光线相对于参考的Y方向物理位置 角度被准确地确定(87),两个参数是在扫描文档之前确定的。

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