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1. 发明授权

US06172772B2 Image scanner with compensation for magnification changes 失效
标题翻译：图像扫描仪补偿放大倍率
公开(公告)号：US06172772B2
公开(公告)日：2001-01-09
申请号：US09127776
申请日：1998-07-31
申请人： Michael J. Steinle , Dan S. Johnson
发明人： Michael J. Steinle , Dan S. Johnson
IPC分类号： H04N100
CPC分类号： H04N1/401
摘要： A process for compensation for real time changes of magnification in an optics system for an image scanner. Targets having high-contrast edges, on both sides of an image to be scanned, are scanned along with the image. If magnification changes, the number of pixels between the targets may change. The pixels between the targets are filtered to generate a fixed number of pixels. Photosensor sensitivity compensation values may be separated into factory compensation values and scanner pre-scan compensation values. Factory compensation values are applied before filtering. Differences between factory compensation values and pre-scan compensation values are applied after filtering.
摘要翻译：用于补偿用于图像扫描器的光学系统中的放大倍率的实时变化的处理。在要扫描的图像的两侧具有高对比度边缘的目标与图像一起扫描。如果放大变化，则目标之间的像素数可能会改变。目标之间的像素被过滤以产生固定数量的像素。光电传感器灵敏度补偿值可以分为出厂补偿值和扫描器预扫描补偿值。过滤前应用工厂补偿值。过滤后应用出厂补偿值和预扫描补偿值之间的差异。

2. 发明授权

US06567570B1 Optical image scanner with internal measurement of point-spread function and compensation for optical aberrations 失效
标题翻译：具有点扩散功能内部测量和光学像差补偿的光学图像扫描仪
公开(公告)号：US06567570B1
公开(公告)日：2003-05-20
申请号：US09183304
申请日：1998-10-30
申请人： Michael J. Steinle , Dan S. Johnson
发明人： Michael J. Steinle , Dan S. Johnson
IPC分类号： G06K920
CPC分类号： H04N1/00013 , H04N1/00002 , H04N1/00018 , H04N1/00031 , H04N1/00045 , H04N1/40
摘要： An image scanner uses optical targets within the scanner to characterize imperfections of a lens system and to partially compensate for the imperfections using digital image processing. In one sample embodiment, a series of two-dimensional optical targets are placed outside the document scanning area. Each individual target is suitable for obtaining an estimate of the point-spread function for a small segment of the scan line. Each point-spread function is then used to compute a convolution kernel for the corresponding segment of the scan line. Alternatively, each point-spread function may be used in an iterative solution for a modified image. In an alternative embodiment, a two-dimensional known random pattern is provided for a target. Cross-correlation of a portion of the known random pattern with the scanned image of the same portion of known random pattern provides an estimate of the point-spread function for the portion of the scan line corresponding to the portion of the known random pattern. Providing a series of targets or continuous random target over the width of the scan line, within the scanner, enables determination of the point-spread function as a function of position for an assembled lens, at the humidity and temperature appropriate for the scan. As a result, a smaller, lower cost lens can be used and some the lens aberrations can be removed from the final scanned image.
摘要翻译：图像扫描器使用扫描仪内的光学目标来表征透镜系统的缺陷，并使用数字图像处理部分地补偿缺陷。在一个示例实施例中，将一系列二维光学目标放置在文档扫描区域的外部。每个单独的目标适合于获得扫描线的小段的点扩散函数的估计。然后，每个点扩散函数用于计算扫描线的相应段的卷积核。或者，每个点扩展函数可以用于修改图像的迭代解。在替代实施例中，为目标提供二维已知随机模式。已知随机图案的一部分与已知随机图案的相同部分的扫描图像的互相关提供了对应于已知随机图案部分的扫描线的部分的点扩展函数的估计。在扫描仪内提供扫描线宽度上的一系列目标或连续随机目标，可以在适合扫描的湿度和温度下，根据组装透镜的位置确定点扩散函数。结果，可以使用更小的较低成本的透镜，并且可以从最终的扫描图像中去除一些透镜像差。

3. 发明授权

US06542260B1 Multiple image scanner 失效
标题翻译：多图像扫描仪
公开(公告)号：US06542260B1
公开(公告)日：2003-04-01
申请号：US08959604
申请日：1997-10-28
申请人： Robert G. Gann , Steven L. Webb , Greg A. Degi , Gregory A. Brake , Kevin J. Youngers , Dan S. Johnson
发明人： Robert G. Gann , Steven L. Webb , Greg A. Degi , Gregory A. Brake , Kevin J. Youngers , Dan S. Johnson
IPC分类号： H04N140
CPC分类号： H04N1/642 , H04N1/46 , H04N1/486
摘要： A multiple image scanner that performs a single scan of a document containing different types of images (e.g., text and graphics) and sends multiple renditions of the same document from the scanner to a host computer (e.g., one high resolution gray scale image and one low resolution high bit depth color image; or one high resolution, low bit depth gray scale or monochrome image and one low resolution, high bit depth gray scale or monochrome image; or one high resolution, low bit depth color image and one low resolution, high bit depth color image), thus greatly reducing the total amount of data sent to and processed by the host computer.
摘要翻译：执行对包含不同类型图像（例如，文本和图形）的文档的单次扫描并且将相同文档的多个再现从扫描器发送到主计算机的多图像扫描器（例如，一个高分辨率灰度图像和一个低分辨率高位深度彩色图像;或一个高分辨率，低位深度灰度级或单色图像和一个低分辨率，高位深度灰阶或单色图像;或一个高分辨率，低位深度彩色图像和一个低分辨率，高位深度彩色图像），从而大大减少了主计算机发送和处理的数据总量。

4. 发明授权

US5237627A Noise tolerant optical character recognition system 失效
标题翻译：耐噪声光学字符识别系统
公开(公告)号：US5237627A
公开(公告)日：1993-08-17
申请号：US722054
申请日：1991-06-27
申请人： Dan S. Johnson , Mark D. Seaman
发明人： Dan S. Johnson , Mark D. Seaman
IPC分类号： G06K9/48 , G06K9/68
CPC分类号： G06K9/68 , G06K9/48 , G06K2209/01
摘要： Disclosed is a system of optical character recognition that first segments a page image into character images. A set of features is extracted and compared to proto-features from a template in order to classify a character, and convert it into a character code. This comparison is performed by comparing each feature of a character image to each proto-feature of each template to create a match rating list which is sorted in descending order. The top match rating and any close ratings are selected and output. To create the ratings, the angles and lengths of the features and proto-features are compared and then the result is normalized to a specific range of values.
摘要翻译：公开了一种光学字符识别系统，其首先将页面图像分割为字符图像。提取一组特征，并将其与模板中的原型特征进行比较，以便对字符进行分类，并将其转换为字符代码。通过比较每个模板的每个原始特征的每个特征，以创建按降序排列的匹配评级列表来执行该比较。选择和输出顶级匹配等级和任何近似评级。为了创建等级，比较特征和原始特征的角度和长度，然后将结果归一化到特定范围的值。

5. 发明授权

US6160249A Adaptive resolution scanning 有权
标题翻译：自适应分辨率扫描
公开(公告)号：US6160249A
公开(公告)日：2000-12-12
申请号：US168706
申请日：1998-10-08
申请人： Steven L. Webb , Dan S. Johnson
发明人： Steven L. Webb , Dan S. Johnson
IPC分类号： H04N1/04 , G06T1/00 , H04N1/00 , H04N1/32 , H01L27/00
CPC分类号： H04N1/00798 , H04N1/00795 , H04N1/0405 , H04N1/0408 , H04N1/32561
摘要： A method of adjusting the resolution of a scan based on the scan area or the scan window size. The smaller the scan window size, the higher the scan resolution would be. The final scan resolution is a function of an initial resolution, a resolution modifier, a printer factor, and an image factor. The resolution modifier, the printer factor and the image factor are dependent on the scan window size, the system printer, and the scan image type respectively.
摘要翻译：基于扫描区域或扫描窗口尺寸来调整扫描的分辨率的方法。扫描窗口大小越小，扫描分辨率越高。最终扫描分辨率是初始分辨率，分辨率修正符，打印机因子和图像因子的函数。分辨率修改器，打印机因子和图像因子分别取决于扫描窗口大小，系统打印机和扫描图像类型。

6. 发明授权

US5212739A Noise tolerant optical character recognition system 失效
标题翻译：耐噪声光学字符识别系统
公开(公告)号：US5212739A
公开(公告)日：1993-05-18
申请号：US875000
申请日：1992-04-24
申请人： Dan S. Johnson
发明人： Dan S. Johnson
IPC分类号： G06K9/48
CPC分类号： G06K9/48 , G06K2209/01
摘要： Disclosed is a method of optical character recognition that first segments a graphical page image into word images. The method obtains a set of features by extracting smaller outlines of the dark regions in the word images, and then further dissecting each of the smaller outlines into small sections called micro-features. Micro-features are simply sections of character outlines, therefore, they can easily be extracted from the outlines of an entire word without any knowledge about character segmentation boundaries. Micro-features are extracted from an outline by finding the local extremities of the outline and then defining a micro-feature between each pair of sequential extremities. Once extracted, the micro-features are compared to micro-features from an ideal character in order to classify a character, and convert it into a character code.
摘要翻译：公开了一种光学字符识别的方法，其首先将图形页面图像分割成字图像。该方法通过提取词图像中的暗区域的较小轮廓来获得一组特征，然后将每个较小的轮廓解剖成称为微特征的小部分。微特征仅仅是字符轮廓的部分，因此，它们可以容易地从整个词的轮廓中提取而不需要对字符分割边界的任何知识。通过查找轮廓的局部末端，然后在每对连续末端之间定义微特征，从轮廓中提取微特征。一旦提取，将微特征与理想角色的微特征进行比较，以便对字符进行分类，并将其转换为字符代码。

7. 发明授权

US07072081B2 Compact portable 2D/ 3D image capture system 有权
公开(公告)号：US07072081B2
公开(公告)日：2006-07-04
申请号：US09999789
申请日：2001-10-24
申请人： Dan S. Johnson , Shaz Naqvi
发明人： Dan S. Johnson , Shaz Naqvi
IPC分类号： H04N1/04 , H04N7/18
CPC分类号： H04N1/04 , H04N1/00286 , H04N1/195 , H04N5/225 , H04N5/2251 , H04N5/2254 , H04N2201/007 , H04N2201/0096
摘要： The present invention provides a compact, portable system for capturing two dimensional images from printed and related media, as well as three dimensional scenic images, such as photographs, combining the optical features of scanning and photography. A compact, portable image capturing system is provided that is relatively simple and inexpensive, which is easy to operate, rugged, reliable, integrating the navigational and text-gathering functionalities seamlessly, transparently, and reliably, and not prone to optical misalignment, or cessation of scanning and loss of information, obviating much of the repetition of scanning efforts required by the conventional art. The present invention provides a compact, portable system for capturing both two dimensional images from printed and related media, and three dimensional scenic images, such as photographs, while providing constant user feedback of the image quality and effectiveness, during the imaging process.

8. 发明授权

US6148117A Image processing system with alterable local convolution kernel 失效
标题翻译：具有可变局部卷积核的图像处理系统
公开(公告)号：US6148117A
公开(公告)日：2000-11-14
申请号：US775061
申请日：1996-12-27
申请人： Patricia D. Lopez , Dan S. Johnson , Nancy K. Mundelius
发明人： Patricia D. Lopez , Dan S. Johnson , Nancy K. Mundelius
IPC分类号： G06F15/16 , G06F17/10 , G06T3/40 , G06T5/20 , G06K15/316
CPC分类号： G06T3/403
摘要： A method for image processing combining a device-specific image processing kernel operation with a general image processing kernel operation. Device specific parameters are sent from a host computer to an imaging device. The imaging device selects appropriate device-specific convolution coefficients. The host computer selects additional kernel operations. In a first example embodiment, the device-specific coefficients are then uploaded to the host computer and the host computer convolves the host-specified operations with the device-specific operations. The combined kernel is then downloaded to the imaging device. In an alternative embodiment, the host-specified operations are downloaded to the imaging device for combining. The combined kernels are then used by the imaging device for convolution operations on an image. As a result, host computer software can modify a kernel operation within an imaging device with minimal knowledge of device-specific parameters such as native resolution.
摘要翻译：一种用于将特定于设备的图像处理核心操作与一般图像处理内核操作相结合的图像处理方法。设备特定的参数从主机发送到成像设备。成像装置选择合适的装置特定卷积系数。主机选择其他内核操作。在第一示例性实施例中，然后将设备特定系数上传到主计算机，并且主计算机将主机指定的操作与特定于设备的操作进行卷积。然后将组合的内核下载到成像设备。在替代实施例中，主机指定的操作被下载到成像设备以进行组合。然后，成像装置将组合的粒子用于图像上的卷积运算。因此，主机计算机软件可以在成像设备内修改内核操作，而对设备特定参数（如原始分辨率）的知识极少。

9. 发明授权

US5483053A Variable resolution color image scanner having an exposure delay between successive linear photosensors detecting different colors 失效
标题翻译：具有检测不同颜色的连续线性光电传感器之间的曝光延迟的可变分辨率彩色图像扫描仪
公开(公告)号：US5483053A
公开(公告)日：1996-01-09
申请号：US312594
申请日：1994-09-27
申请人： Dan S. Johnson , Wayne G. Phillips
发明人： Dan S. Johnson , Wayne G. Phillips
IPC分类号： H04N1/04 , G06T1/00 , H04N1/387 , H04N1/48 , G01J3/50
CPC分类号： H04N1/486
摘要： A method of scanning an object at a predetermined resolution along the scanning direction with color scanner apparatus having M linear photosensors positioned in parallel, spaced-apart relation and being exposed for a predetermined exposure time, may comprise the steps of calculating an exposure delay time for each of (M-1) slave linear photosensors. Then, at a start scan time, a master linear photosensor is exposed to light from the illuminated scan line for the predetermined exposure time. However, the slave linear photosensors are not necessarily exposed at the start scan time. Instead, the first exposure for each of the slave linear photosensors is delayed for a time equivalent to the exposure delay time calculated for each respective slave linear photosensor.
摘要翻译：一种使用具有M个线性光电传感器的彩色扫描仪装置沿着扫描方向扫描物体的方法，所述M个线性光电传感器以平行，间隔的关系定位并暴露于预定的曝光时间，可以包括以下步骤：计算曝光延迟时间每个（M-1）从属线性光电传感器。然后，在开始扫描时间，将主线性光电传感器暴露于来自照射的扫描线的预定曝光时间的光。然而，在启动扫描时间，从属线性光电传感器不一定被曝光。相反，每个从属线性光电传感器的第一曝光被延迟等于对于每个相应从属线性光电传感器计算的曝光延迟时间的时间。

10. 发明授权

US4802030A Head-tape alignment apparatus with a tape edge find operation 失效
标题翻译：具有磁带边缘查找操作的磁带对准装置
公开(公告)号：US4802030A
公开(公告)日：1989-01-31
申请号：US878165
申请日：1986-06-25
申请人： Steven G. Henry , Dan S. Johnson , Kurt E. Spears , Mark E. Wanger
发明人： Steven G. Henry , Dan S. Johnson , Kurt E. Spears , Mark E. Wanger
IPC分类号： G11B5/55 , G11B15/02 , G11B21/08 , G11B5/56 , G11B5/584
CPC分类号： G11B15/026 , G11B21/086 , G11B5/5508
摘要： A solution to accurately aligning a read-write head over a previously written data track on both a write protected and not write protected tape is disclosed. A control unit, preferably a programmed microprocessor, electronically provides a sequence of control outputs to move the tape and step the head to locate an edge of the tape. The control unit then moves the head a fixed distance to be over a selected data track. A threshold circuit controls the readout of data from the head of the tape in such a way as to improve edge find reliability.
摘要翻译：公开了一种用于在写保护和不写保护的带上在先前写入的数据轨道上精确地对准读写头的解决方案。控制单元，优选地是编程的微处理器，电子地提供一系列控制输出以移动磁带并步进磁头以定位磁带的边缘。然后，控制单元将头部移动一定的距离，使其超过选定的数据轨迹。阈值电路控制从磁带头读出数据，以提高边缘查找的可靠性。

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