公开(公告)号：US06310984B2

公开(公告)日：2001-10-30

申请号：US09057847

申请日：1998-04-09

申请人： Cindy Y. Sansom-Wai ,  Irene H. Williams ,  Daniel R. Tretter

发明人： Cindy Y. Sansom-Wai ,  Irene H. Williams ,  Daniel R. Tretter

IPC分类号： G06K936

CPC分类号： H04N1/3878 ,  G06K9/32 ,  H04N1/38 ,  H04N1/387

摘要： A system and method is described for automatically determining in a scanned document image the presence of unwanted extraneous information caused by an extraneous device and scanner background information. Once the presence of this information is determined, the system and method of the present invention can compute, for instance, skew and crop statistics. From this, the image can be automatically deskewed and cropped appropriately without the background and extraneous information. The system and method accomplishes this by first determining the presence of unwanted extraneous and background information and then appropriately processing the document image. The extraneous information is ignored during deskew and crop computations. Also, the scanner background and the extraneous information are prevented from being included in the final digital representation of the image.

摘要翻译： 描述了一种系统和方法，用于在扫描的文档图像中自动确定由外部设备和扫描仪背景信息引起的不需要的无关信息的存在。 一旦确定了该信息的存在，本发明的系统和方法可以计算例如倾斜和作物统计。 从此，可以自动将图像自动进行偏移和裁剪，而无需背景和无关信息。 系统和方法通过首先确定不需要的外来和背景信息的存在，然后适当地处理文档图像来实现。 在去歪斜和作物计算过程中，无关的信息被忽略。 此外，防止扫描仪背景和无关信息被包括在图像的最终数字表示中。

公开(公告)号：US06411331B1

公开(公告)日：2002-06-25

申请号：US08808918

申请日：1997-02-28

申请人： Cindy Y. Sansom-Wai ,  Kirt A. Winter ,  Paul M. Hubel

发明人： Cindy Y. Sansom-Wai ,  Kirt A. Winter ,  Paul M. Hubel

IPC分类号： H04N973

CPC分类号： H04N9/735

摘要： A digital camera includes a lens and a plurality of color filters adjacent the lens. An array of detectors such as CCDs each receive, through the lens and a corresponding one of the color filters, light reflected from a scene. Each detector outputs a signal representative of an amount of light it receives. Circuitry is connected to the array for processing the signals from the detectors and generating a set of digital image data including a chromaticity value and a luminance value of a plurality of pixels representing an uncorrected image of the scene. A control circuit maps a two-dimensional representation of the digital image data into a two-dimensional representation of a set of reference image data and adjusts selected ones of the values of the set of digital image data in accordance with a predetermined transform to white balance the uncorrected image of the scene and produce a modified set of digital image data representing a corrected image of the scene.

摘要翻译： 数码相机包括透镜和与透镜相邻的多个滤色器。 诸如CCD的检测器阵列各自通过透镜和对应的一个滤色器从场景反射的光接收。 每个检测器输出表示其接收的光量的信号。 电路连接到阵列，用于处理来自检测器的信号，并产生一组数字图像数据，包括表示场景的未校正图像的多个像素的色度值和亮度值。 控制电路将数字图像数据的二维表示映射成一组参考图像数据的二维表示，并且根据对白平衡的预定变换来调整该组数字图像数据中的选定值 该场景的未校正图像并且产生表示场景的校正图像的经修改的数字图像数据集合。