Image reading apparatus
    1.
    发明授权
    Image reading apparatus 失效
    图像读取装置

    公开(公告)号:US5847884A

    公开(公告)日:1998-12-08

    申请号:US890352

    申请日:1997-07-09

    摘要: An image reading apparatus which reads document surfaces of open book-like documents placed on a document platen in a face upward condition, the image reading apparatus comprises; a first detector which detects a height distribution of a document surface in a main scanning direction, a second detector which detects a height distribution of the document surface in a sub-scanning direction, and a direction discrimination device for discriminating whether a placement direction of the document is a main scanning direction or a sub-scanning direction based on the height distributions.

    摘要翻译: 一种图像读取装置,其以面朝上的状态读取放置在原稿台上的打开的书本文件的文件表面,图像读取装置包括: 第一检测器,其检测文件表面在主扫描方向上的高度分布;检测文档表面在副扫描方向上的高度分布的第二检测器;以及方向判别装置,用于鉴别文档表面的扫描方向 文档是基于高度分布的主扫描方向或副扫描方向。

    Document scanner for book document
    4.
    发明授权
    Document scanner for book document 失效
    文件扫描器

    公开(公告)号:US5764379A

    公开(公告)日:1998-06-09

    申请号:US529365

    申请日:1995-09-18

    摘要: An image reading apparatus which reads book-like documents placed on a document platen in a face upward condition. A first detector detects the height of the document surface by the shape of a side surface of the document, and a second detector detects the height of the document by the shape of the document surface. A discrimination device detects abnormal height data detected by the detectors, and distortion of image data output from an imaging device is corrected using height data determined to have no abnormality.

    摘要翻译: 一种图像读取装置,其以面朝上的状态读取放置在原稿台上的书本文件。 第一检测器通过文件的侧表面的形状检测原稿表面的高度,第二检测器通过文件表面的形状检测文档的高度。 识别装置检测由检测器检测的异常高度数据,并且使用被确定为没有异常的高度数据校正从成像装置输出的图像数据的失真。

    Image reading apparatus
    6.
    发明授权
    Image reading apparatus 失效
    用于检测边缘并校正被读取的文档的不同高度的图像读取装置

    公开(公告)号:US06687420B1

    公开(公告)日:2004-02-03

    申请号:US08530434

    申请日:1995-09-19

    IPC分类号: G06K936

    摘要: In an image reading apparatus in which a document is read with scanning by a image pickup device, a height of the document and an outline of the document are detected. Based on the detected height and outline data, together with a calculating of a document size, an offset amount from a setting reference position of the document is calculated. Based on the calculations, the image is processed properly. Also, if the document is not placed correctly or a degree of an image distortion is not within a correctable range, an alarm is issued.

    摘要翻译: 在通过图像拾取装置扫描读取文档的图像读取装置中,检测文档的高度和文档的轮廓。 基于检测到的高度和轮廓数据,与文档尺寸的计算一起计算与文档的设置参考位置的偏移量。 根据计算,图像被正确处理。 此外,如果文档未正确放置或图像失真程度不在可校正范围内,则发出报警。

    Document reading apparatus for detection of curvatures in documents
    8.
    发明授权
    Document reading apparatus for detection of curvatures in documents 失效
    用于检测文件中的曲率的文件读取装置

    公开(公告)号:US5084611A

    公开(公告)日:1992-01-28

    申请号:US588652

    申请日:1990-09-26

    摘要: A document reading apparatus comprising a document table, a reading section disposed above the document table for reading a document, e.g. an opened book, placed on the document table, and a linear light source for emitting light to the opened book at an angle thereto. The reading section includes a sensor for detecting an image of the light emitted to the book. This image displays a brightness distribution over surfaces of the opened book including curvatures adjacent the joint. The brightness distribution is used as a reference for rectifying an image signal corresponding to the opened book when the document image is reproduced.

    摘要翻译: 一种文件读取装置,包括文件表,设置在用于读取文档的文档表格上方的读取部分,例如 放置在文件台上的打开的书,以及以一定角度向打开的书发光的线性光源。 读取部分包括用于检测发射到书的光的图像的传感器。 该图像显示在打开的书的表面上的亮度分布,包括在关节附近的曲率。 当再现文档图像时,亮度分布用作校正对应于打开的书的图像信号的参考。

    Image reader that stores sets of luminance correction data corresponding
to document a surface height
    9.
    发明授权
    Image reader that stores sets of luminance correction data corresponding to document a surface height 失效
    存储对应于记录表面高度的亮度校正数据集的图像读取器

    公开(公告)号:US5969829A

    公开(公告)日:1999-10-19

    申请号:US933263

    申请日:1997-09-18

    摘要: An image reader capable of outputting excellent quality read images, without illumination irregularities, similar to that of flat documents even when the document surface is curved as in the case of book-like documents. An image reader provided with a memory to store correction data to correct differences of illumination of each pixel of a document image, and which corrects the read information of each pixel in a document image using correction data corresponding to the measured height of a document surface among correction data stored in the memory. For one aspect, this image reader is constructed so as to correct a group of read information corresponding to a set of pixels arrayed in one direction by excluding specific frequencies among the illumination distribution from the set.

    摘要翻译: 图像读取器能够输出优质的读取图像,无需照明不规则,与平面文档相似,即使当文书表面像书籍文件一样弯曲时。 一种具有存储器的图像读取器,用于存储校正数据以校正文档图像的每个像素的照明差异,并使用与文档表面的测量高度相对应的校正数据校正文档图像中的每个像素的读取信息 存储在存储器中的校正数据。 一方面,该图像读取器被构造成通过排除来自该组的照明分布中的特定频率来校正与沿一个方向排列的一组像素相对应的一组读取信息。

    Image reading apparatus for reading book-like documents
    10.
    发明授权
    Image reading apparatus for reading book-like documents 失效
    用于阅读书本文件的图像读取装置

    公开(公告)号:US6041146A

    公开(公告)日:2000-03-21

    申请号:US599380

    申请日:1996-02-09

    IPC分类号: G06T1/00 H04N1/401 G06K9/40

    CPC分类号: H04N1/401

    摘要: An image reader for reading book-like documents placed on a document platen in a face upward condition, said image reader comprises a shading reference panel provided beside the document platen which is white in color and of uniform density, an image reading device which reads the document platen on which the book-like document is placed and the shading reference panel, and outputs image data, a height detector which detects a height distribution of the book-like document, an illuminance detector which detects an illuminance irregularity in accordance with the image data corresponding to the shading reference panel, calculator which calculates shading correction data in accordance with the height distribution and the illuminance irregularity on the shading reference panel and, shading corrector which corrects the illuminance irregularity of the image data corresponding to the book-like document in accordance with the shading correction data.

    摘要翻译: 一种图像阅读器,用于以面朝上的状态读取放置在原稿台上的书本文件,所述图像读取器包括设置在原稿台上的白色和均匀密度的着色参考面板,读取该图像读取装置的图像读取装置 放置书本文件的原稿台板和阴影参考面板,并输出图像数据,检测书本文件的高度分布的高度检测器,根据图像检测照度不规则的照度检测器 对应于阴影参考面板的数据,根据阴影参考面板上的高度分布和照度不规则来计算阴影校正数据的计算器,以及校正与该类似书面文档相对应的图像数据的照度不规则性的阴影校正器 根据阴影校正数据。