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1.发明授权Method and apparatus for distinguishing between noisy continuous tone document types and other document types to maintain reliable image segmentation 有权用于区分嘈杂的连续色调文档类型和其他文档类型以保持可靠的图像分割的方法和装置公开(公告)号：US06411735B1
公开(公告)日：2002-06-25
申请号：US09158868
申请日：1998-09-23
IPC分类号： G06K962
CPC分类号： G06K9/00456 , H04N1/40062
摘要： A method and apparatus are disclosed for distinguishing noisy continuous tone document types from other document types such as halftone or text, in order to maintain reliable image segmentation. In both cases a Range of Video microclassifier is added to the other microclassifiers (Sij, estimated halftone frequency, etc.) to disqualify noisy continuous tone images from being incorrectly classified as other document types such as halftone or text document types.
摘要翻译： 公开了一种用于区分噪声连续色调文档类型和其他文档类型（例如半色调或文本）的方法和装置，以便保持可靠的图像分割。 在这两种情况下，将视频微分类器的范围添加到其他微分类器（Sij，估计的半色调频率等），以使噪声连续色调图像被不正确地分类为诸如半色调或文本文档类型的其他文档类型。
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2.发明授权公开(公告)号：US06181829B2
公开(公告)日：2001-01-30
申请号：US09010331
申请日：1998-01-21
IPC分类号： G06K940
CPC分类号： H04N1/40062
摘要： A system and method classify a pixel of image data as one of a plurality of image types. A first image characteristic value for the pixel, a second image characteristic value for the pixel ,a third image characteristic value for the pixel, and a fourth image characteristic for the pixel is determined. Some of these determinations may be resolution dependent. The values from these determination are utilized in assigning an image type classification to the pixel. Moreover, if at least one of the image characteristic values is greater than a predetermined threshold value the pixel is classified as a halftone peak value. The system includes a plurality of microclassifiers for determining a distinct image characteristic value of the pixel; a plurality of macroreduction circuits connected to the plurality of microclassifiers for performing further higher level operations upon the distinct image characteristic values of the pixel to produce reduced values; and a classification circuit to classify the pixel as an image type based on the reduced values from the macroreduction circuits. The system also includes a circuit to detect flat peaks without detecting multiple peaks and a rectangular blur filtering system.
摘要翻译： 系统和方法将图像数据的像素分类为多个图像类型之一。 确定像素的第一图像特征值，像素的第二图像特征值，像素的第三图像特征值和用于像素的第四图像特性。 这些确定中的一些可能取决于分辨率。 来自这些确定的值被用于为像素分配图像类型分类。 此外，如果图像特征值中的至少一个大于预定阈值，则将像素分类为半色调峰值。 该系统包括用于确定像素的不同图像特征值的多个微分类器; 连接到所述多个微分类器的多个宏观还原电路，用于根据所述像素的不同图像特征值进行更高级的操作以产生减小的值; 以及分类电路，用于基于来自大致减小电路的减小值将像素分类为图像类型。 该系统还包括用于检测平坦峰而不检测多个峰的电路和矩形模糊滤波系统。
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公开(公告)号：US5959290A
公开(公告)日：1999-09-28
申请号：US004346
申请日：1998-01-08
CPC分类号： H04N1/00801 , H04N1/00795 , H04N1/38 , H04N2201/0422
摘要： A system and method which enables the location and orientation of an image to be determined without introducing scanning artifacts into the rendered image. The system utilizes a separate set of sensors on a scanning bar that are sensitive to a wavelength of light outside the range of wavelengths of the typical sensors found on the scanning bar, such as red, green, or blue. Moreover, the system includes a light source which is capable of emitting the wavelength of light that is outside this range of wavelength of light. Thus, whenever the additional set of sensors detect light, the system would determine that the light was due to a scanning artifact, such as a hole, rip, or dog ear in the original document being scanned. Furthermore, the system would include a process which measures the variations of the image signal in the fastscan and slowscan directions, as well as, the gray level of the video signal from these various measurements, the system would develop a cost value as to the certainty as whether the signal represents a scanning artifact. In such a system, the backing would be embedded with a pattern which would have a predetermined variation in a fastscan direction but have little or no variation in a slowscan direction.
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4.发明授权
公开(公告)号：US5778156A
公开(公告)日：1998-07-07
申请号：US646608
申请日：1996-05-08
CPC分类号： G06T7/0081 , G06T7/0087 , G06T2207/10016 , G06T2207/30176
摘要： A system and method electronically image process a pixel belonging to a set of digital image data with respect to a membership of the pixel in a plurality of image classes. This process uses classification to determine a membership value for the pixel for each image classes and generates an effect tag for the pixel based on the fuzzy classification determination. The pixel is image processed based on the membership vector of the pixel. The image processing may include screening and filtering. The screening process screens the pixel by generating a screen value according to a position of the pixel in the set of digital image data; generating a screen amplitude weighting value based on the values in the membership vector for the pixel; multiplying the screen value and the screen amplitude weighting value to produce a modified screen value; and adding the modified screen value to the pixel of image data. The filtering process filters the pixel by lowpass filtering the pixel; highpass filtering the pixel; non-filtering the pixel; multiplying each filtered pixel by a gain factor based on the values in the membership vector associated with the pixel; and adding the products to produce a filtered pixel of image data.
摘要翻译： 一种系统和方法电子图像处理属于一组数字图像数据的像素相对于多个图像类别中的像素的隶属度。 该过程使用分类来确定每个图像类别的像素的隶属度值，并且基于模糊分类确定来生成像素的效应标签。 基于像素的隶属矢量对像素进行图像处理。 图像处理可以包括筛选和过滤。 筛选过程通过根据数字图像数据集合中的像素的位置生成屏幕值来屏蔽像素; 基于所述像素的隶属向量中的值生成屏幕幅度加权值; 将屏幕值和屏幕振幅加权值相乘以产生修改的屏幕值; 并将修改的屏幕值添加到图像数据的像素。 滤波过程通过对像素进行低通滤波来过滤像素; 高通滤波像素; 不过滤像素; 基于与像素相关联的成员向量中的值，将每个经滤波的像素乘以增益因子; 并添加产品以产生图像数据的滤波像素。
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5.发明授权公开(公告)号：US06252680B1
公开(公告)日：2001-06-26
申请号：US09004351
申请日：1998-01-08
IPC分类号： H04N138
CPC分类号： H04N1/409 , H04N1/38 , H04N1/4097
摘要： A system and method which enables the location and orientation of an image to be determined without introducing scanning artifacts into the rendered image. The system utilizes a separate set of sensors on a scanning bar that are sensitive to a wavelength of light outside the range of wavelengths of the typical sensors found on the scanning bar, such as red, green, or blue. Moreover, the system includes a light source which is capable of emitting the wavelength of light that is outside this range of wavelength of light. Thus, whenever the additional set of sensors detect light, the system would determine that the light was due to a scanning artifact, such as a hole, rip, or dog ear in the original document being scanned. Furthermore, the system would include a process which measures the variations of the image signal in the fastscan and slowscan directions, as well as, the gray level of the video signal from these various measurements, the system would develop a cost value as to the certainty as whether the signal represents a scanning artifact. In such a system, the backing or cover would be embedded with a pattern which would have a predetermined variation in a fastscan direction but have little or no variation in a slowscan direction.
摘要翻译： 一种使得能够确定图像的位置和方位而不将扫描伪影引入到渲染图像中的系统和方法。 该系统在扫描杆上使用对扫描条上发现的典型传感器波长范围（例如红色，绿色或蓝色）的波长波长敏感的扫描条上的一组单独的传感器。 此外，该系统包括能够发射在该波长范围之外的光的波长的光源。 因此，每当附加的传感器组检测到光时，系统将确定光是由于扫描原件造成的，例如正在扫描的原稿中的孔，裂纹或狗耳等扫描伪影。 此外，该系统将包括测量图像信号在快扫和慢扫描方向上的变化的过程以及来自这些各种测量的视频信号的灰度级，系统将产生关于确定性的成本值 作为信号是否表示扫描伪像。 在这种系统中，背衬或盖子将嵌入一种图案，该图案将在快速扫描方向上具有预定的变化，但在慢扫描方向上几乎没有或没有变化。
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6.发明授权
公开(公告)号：US06122393A
公开(公告)日：2000-09-19
申请号：US4186
申请日：1998-01-08
CPC分类号： H04N1/409 , H04N1/38 , H04N1/4097
摘要： A system and method which enables the location and orientation of an image to be determined without introducing scanning artifacts into the rendered image. The system utilizes a separate set of sensors on a scanning bar that are sensitive to a wavelength of light outside the range of wavelengths of the typical sensors found on the scanning bar, such as red, green, or blue. Moreover, the system includes a light source which is capable of emitting the wavelength of light that is outside this range of wavelength of light. Thus, whenever the additional set of sensors detect light, the system would determine that the light was due to a scanning artifact, such as a hole, rip, or dog ear in the original document being scanned. Furthermore, the system would include a process which measures the variations of the image signal in the fastscan and slowscan directions, as well as, the gray level of the video signal from these various measurements, the system would develop a cost value as to the certainty as whether the signal represents a scanning artifact. In such a system, the backing would be embedded with a pattern which would have a predetermined variation in a fastscan direction but have little or no variation in a slowscan direction.
摘要翻译： 一种使得能够确定图像的位置和方位而不将扫描伪影引入到渲染图像中的系统和方法。 该系统在扫描杆上使用对扫描条上发现的典型传感器波长范围（例如红色，绿色或蓝色）的波长波长敏感的扫描条上的一组单独的传感器。 此外，该系统包括能够发射在该波长范围之外的光的波长的光源。 因此，每当附加的传感器组检测到光时，系统将确定光是由于扫描原件造成的，例如正在扫描的原稿中的孔，裂纹或狗耳等扫描伪影。 此外，该系统将包括测量图像信号在快扫和慢扫描方向上的变化的过程以及来自这些各种测量的视频信号的灰度级，系统将产生关于确定性的成本值 作为信号是否表示扫描伪像。 在这样的系统中，背衬将被嵌入具有在快扫方向上具有预定变化但在慢扫描方向上几乎没有或没有变化的图案。
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7.发明授权公开(公告)号：US06246781B1
公开(公告)日：2001-06-12
申请号：US09004355
申请日：1998-01-08
IPC分类号： G06K900
CPC分类号： H04N1/409 , H04N1/38 , H04N1/4097
摘要： A system and method which enables the location and orientation of an image to be determined without introducing scanning artifacts into the rendered image. The system utilizes a separate set of sensors on a scanning bar that are sensitive to a wavelength of light outside the range of wavelengths of the typical sensors found on the scanning bar, such as red, green, or blue. Moreover, the system includes a light source which is capable of emitting the wavelength of light that is outside this range of wavelength of light. Thus, whenever the additional set of sensors detect light, the system would determine that the light was due to a scanning artifact, such as a hole, rip, or dog ear in the original document being scanned. Furthermore, the system would include a process which measures the variations of the image signal in the fasts can and slows can directions, as well as, the gray level of the video signal from these various measurements, the system would develop a cost value as to the certainty as whether the signal represents a scanning artifact. In such a system, the backing would be embedded with a pattern which would have a predetermined variation in a fasts can direction but have little or no variation in a slowscan direction.
摘要翻译： 一种使得能够确定图像的位置和方位而不将扫描伪影引入到渲染图像中的系统和方法。 该系统在扫描杆上使用对扫描条上发现的典型传感器波长范围（例如红色，绿色或蓝色）的波长波长敏感的扫描条上的一组单独的传感器。 此外，该系统包括能够发射在该波长范围之外的光的波长的光源。 因此，每当附加的传感器组检测到光时，系统将确定光是由于扫描原件造成的，例如正在扫描的原稿中的孔，裂纹或狗耳等扫描伪影。 此外，该系统将包括一个过程，该过程可以测量快速可能的图像信号的变化，并减慢可能的方向，以及来自这些各种测量的视频信号的灰度级，系统会产生成本值 确定信号是否表示扫描伪影。 在这种系统中，背衬将被嵌入一种图案，该图案将在快速方向上具有预定的变化，但在慢扫描方向上几乎没有或没有变化。
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8.发明授权公开(公告)号：US06229923B1
公开(公告)日：2001-05-08
申请号：US09010025
申请日：1998-01-21
IPC分类号： G06K962
CPC分类号： G06K9/00456
摘要： A system and method classify a pixel of image data as one of a plurality of image types. A first image characteristic value for the pixel, a second image characteristic value for the pixel, a third image characteristic value for the pixel, and a fourth image characteristic for the pixel is determined. Some of these determinations may be resolution dependent. The values from these determination are utilized in assigning an image type classification to the pixel. Moreover, if at least one of the image characteristic values is greater than a predetermined threshold value the pixel is classified as a halftone peak value. The system includes a plurality of microclassifiers for determining a distinct image characteristic value of the pixel; a plurality of macroreduction circuits connected to the plurality of microclassifiers for performing further higher level operations upon the distinct image characteristic values of the pixel to produce reduced values; and a classification circuit to classify the pixel as an image type based on the reduced values from the macroreduction circuits. The system also includes a circuit to detect flat peaks without detecting multiple peaks and a rectangular blur filtering system.
摘要翻译： 系统和方法将图像数据的像素分类为多个图像类型之一。 确定像素的第一图像特征值，像素的第二图像特征值，像素的第三图像特征值和用于像素的第四图像特性。 这些确定中的一些可能取决于分辨率。 来自这些确定的值被用于为像素分配图像类型分类。 此外，如果图像特征值中的至少一个大于预定阈值，则将像素分类为半色调峰值。 该系统包括用于确定像素的不同图像特征值的多个微分类器; 连接到所述多个微分类器的多个宏观还原电路，用于根据所述像素的不同图像特征值进行更高级的操作以产生减小的值; 以及分类电路，用于基于来自大致减小电路的减小值将像素分类为图像类型。 该系统还包括用于检测平坦峰而不检测多个峰的电路和矩形模糊滤波系统。
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公开(公告)号：US4757389A
公开(公告)日：1988-07-12
申请号：US61745
申请日：1987-06-15
申请人： Raymond J. Clark , Leon C. Williams
发明人： Raymond J. Clark , Leon C. Williams
CPC分类号： H04N1/401
摘要： A raster input scanner in which a dither generator introduces a random error signal to artificially increase the calibration signal accuracy during calibration of the scanner.
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10.发明授权Platen cover for a digital document scanner with electrically switchable reflectance modes 失效用于具有电气可切换反射模式的数字文档扫描仪的压板盖
公开(公告)号：US5790211A
公开(公告)日：1998-08-04
申请号：US525884
申请日：1995-09-08
申请人： Ned J. Seachman , Leon C. Williams
发明人： Ned J. Seachman , Leon C. Williams
CPC分类号： H04N1/00795 , H04N2201/0422
摘要： A system and method digitally scans a document using a high reflectance mode and a low reflectance mode. Initially, a platen cover provides a low reflectance background around the document and the scanner scans the low reflectance background and document to determine an edge of the document or to retrieve other image characteristics of the document. Subsequently, the platen cover changes so as to provide a high reflectance background around the document. The scanner then scans the high reflectance background and the document and produces digital image data relating to an image on the document.
摘要翻译： 系统和方法使用高反射率模式和低反射率模式对文档进行数字扫描。 最初，压板盖在文件周围提供低反射率背景，并且扫描仪扫描低反射率背景和文档以确定文档的边缘或检索文档的其他图像特征。 随后，压板盖改变，以便在文件周围提供高反射率背景。 然后，扫描仪扫描高反射率背景和文档，并产生与文档上的图像有关的数字图像数据。
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