公开(公告)号：US07791756B2

公开(公告)日：2010-09-07

申请号：US11120932

申请日：2005-05-03

Applicant: Chengwu Cui

Inventor： Chengwu Cui

IPC: G06K15/00 ,  G06F3/12

CPC classification number: G06K9/2063 ,  G06K9/00442 ,  G06K2209/01

Abstract: To reduce errors introduced by a scanner, an unmarked, digital master document may be generated and stored in digital form so that subsequent scanning of the document is unnecessary to place it in digital form for comparison to a marked version of the document. Additionally, regions or fields, rather than the entire digital master document, may be individually created, stored, and subsequently used for comparison to corresponding portions of a marked version. Further, test targets or patterns may be inserted into the content of a digital master document. Characteristics of image quality degeneration and distortion can be extracted from printed versions of the test targets or patterns and used to effect closed loop control to digitally reduce image quality degeneration caused by the scanner.

Abstract translation: 为了减少由扫描仪引入的错误，可以生成并以数字形式存储未标记的数字主文档，使得文档的后续扫描不需要以数字形式放置，以与文档的标记版本进行比较。 此外，区域或字段，而不是整个数字主文档可以被单独地创建，存储，并随后用于与标记版本的对应部分进行比较。 此外，可以将测试目标或模式插入到数字主文档的内容中。 可以从打印版本的测试对象或图案中提取图像质量退化和失真的特征，并用于实现闭环控制，以数字化降低扫描仪引起的图像质量退化。

公开(公告)号：US20090168122A1

公开(公告)日：2009-07-02

申请号：US11964082

申请日：2007-12-26

Applicant: Chengwu Cui

Inventor： Chengwu Cui

IPC: H04N1/04

CPC classification number: H04N1/02815 ,  H04N1/0282 ,  H04N1/0287 ,  H04N1/02885 ,  H04N2201/0081

Abstract: A scan module including an image sensor defining a scan field, at least one lamp positioned to illuminate at least a portion of the scan field, and a second light source positioned to provide illumination for the portion of the scan field.

Abstract translation: 一种扫描模块，包括限定扫描场的图像传感器，定位成照射扫描场的至少一部分的至少一个灯，以及定位成为扫描场的该部分提供照明的第二光源。

公开(公告)号：US20090153912A1

公开(公告)日：2009-06-18

申请号：US11958768

申请日：2007-12-18

Applicant: Mohamed Nooman Ahmed ,  Chengwu Cui ,  Ahmed Hamad Mohamed Eid

Inventor： Mohamed Nooman Ahmed ,  Chengwu Cui ,  Ahmed Hamad Mohamed Eid

IPC: H04N1/00

CPC classification number: H04N1/00002 ,  H04N1/00013 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00053 ,  H04N1/00063 ,  H04N1/00068 ,  H04N1/00087 ,  H04N1/0009 ,  H04N1/40062

Abstract: A scanner calibration strip medium is described which includes at least one of a plurality of text symbols and a plurality of halftoned non-text images. A scanner is described which includes a scan bar and a scanner calibration strip medium scannable by the scan bar. The calibration strip medium includes a plurality of text symbols having text pixels and a plurality of halftoned non-text images having halftoned non-text pixels. A method for segmenting a scanned document image into text symbols and halftoned non-text images is described which uses a scanner calibration strip medium which includes a plurality of text symbols having text pixels and a plurality of halftoned non-text symbols having halftoned non-text pixels, wherein the calibration strip medium has a known pixel classification including which pixels of the calibration strip medium are text pixels and which pixels of the calibration strip medium are halftoned non-text pixels.

Abstract translation: 描述了包括多个文本符号和多个半色调非文本图像中的至少一个的扫描仪校准条介质。 描述了一种扫描器，其包括扫描条和由扫描条可扫描的扫描仪校准条介质。 校准条介质包括具有文本像素的多个文本符号和具有半色调非文本像素的多个半色调非文本图像。 描述了将扫描文档图像分割为文本符号和半色调非文本图像的方法，其使用扫描仪校准条介质，其包括具有文本像素的多个文本符号和具有半色调非文本的多个半色调非文本符号 像素，其中校准条介质具有已知的像素分类，其包括校准条介质的哪些像素是文本像素，以及校准条介质的哪些像素是非文本像素的半色调。

公开(公告)号：US20090153698A1

公开(公告)日：2009-06-18

申请号：US11958563

申请日：2007-12-18

Applicant: Chengwu Cui ,  Mark Lane Mayberry ,  Karl Mark Thompson

Inventor： Chengwu Cui ,  Mark Lane Mayberry ,  Karl Mark Thompson

IPC: H04N5/235

CPC classification number: H04N5/357 ,  H04N1/40056 ,  H04N5/3692

Abstract: A method for adjusting a controller of a scanner includes obtaining a scan of a predefined image. The method further includes moving the sensor-element signals of the control signal pattern generated by the controller earlier in the pattern by at least one unit and obtaining an additional scan. The obtaining and moving are repeated until a comparison of a latest additional scan to the image is worse than a comparison of a second-latest additional scan to the image. Another method obtains a noise-reducing heuristic which modifies a time parameter of a sensor-element signal. A set of repeated scans of a same scan line is obtained, noise is measured there from, the time parameter is modified by one predetermined unit, and the process repeats until the noise measured from the latest set of repeated scans is worse than that from the second-latest set of repeated scans.

Abstract translation: 用于调整扫描器的控制器的方法包括获得预定图像的扫描。 该方法进一步包括将由控制器产生的控制信号模式的传感器元件信号以模式提前至少一个单元移动，并获得附加的扫描。 重复获取和移动直到对图像的最新附加扫描的比较比对第二次附加扫描与图像的比较差。 另一种方法获得修改传感器元件信号的时间参数的降噪启发式。 获得同一扫描线的一组重复扫描，从那里测量噪声，时间参数被修改一个预定单位，并且该过程重复，直到从最新的一组重复扫描测得的噪声比来自 第二组重复扫描。

公开(公告)号：US20070159655A1

公开(公告)日：2007-07-12

申请号：US11329638

申请日：2006-01-11

Applicant: Chengwu Cui

Inventor： Chengwu Cui

IPC: H04N1/40

CPC classification number: H04N1/401 ,  H04N5/217 ,  H04N5/2354

Abstract: A method is provided for compensating two-dimensional images for non-uniformity variations in the illumination of a document, or a scene, that is acquired by a digital camera. The invention can include a printer and/or a personal computer to perform some or all of the compensation calculations, if desired. The present invention captures initial image data, determines a region or area of that data having substantially, or somewhat, uniform pixel intensities and uses that as a background or border region. This border data is used to calculate correction data to correct or compensate the non-border pixel values for non-uniformities in the illumination of the image when it was first acquired, without needing a separate reference frame.

Abstract translation: 提供了一种用于补偿二维图像以用于由数字照相机获取的文档或场景的照明中的不均匀性变化的方法。 如果需要，本发明可以包括打印机和/或个人计算机来执行部分或全部补偿计算。 本发明捕获初始图像数据，确定具有基本上或稍微均匀的像素强度的该数据的区域或区域，并将其用作背景或边界区域。 该边界数据用于计算校正数据，以校正或补偿当图像首次获取时图像的照明中的非均匀性的非边界像素值，而不需要单独的参考帧。

公开(公告)号：US20070047016A1

公开(公告)日：2007-03-01

申请号：US11217744

申请日：2005-09-01

Applicant: Jesse Borders ,  Chengwu Cui ,  Larry Kiser

Inventor： Jesse Borders ,  Chengwu Cui ,  Larry Kiser

IPC: H04N1/00

CPC classification number: H04N1/00002 ,  H04N1/00013 ,  H04N1/00031 ,  H04N1/00045 ,  H04N1/00053 ,  H04N1/00063 ,  H04N1/00068 ,  H04N1/00087 ,  H04N1/0009 ,  H04N1/4076

Abstract: Methods of identifying the location and dimensions of a contaminant particle on a calibration strip may be used to compensate for contaminant particles on a calibration strip. A method of locating a contaminant particle on a calibration strip comprises imaging a calibration strip comprising a plurality of channels arranged in rows and a plurality of pixel columns, wherein each channel comprises a plurality of horizontally adjacent pixels, and each pixel column comprises pixels from a plurality of channels. The method also includes generating an average pixel intensity value by normalizing the channels and locating a contaminant particle in a pixel column by comparing the intensity of an individual pixel in the pixel column to the average pixel intensity value. An intensity value of an individual pixel less than a predefined limit set below the normalized local average pixel intensity value corresponds to a location of a contaminant particle. The method further includes identifying the number of adjacent pixels in a pixel column less than a predefined limit set below the normalized local average pixel intensity value.

Abstract translation: 识别校准条上污染物颗粒的位置和尺寸的方法可用于补偿校准条上的污染物颗粒。 将污染物颗粒定位在校准条上的方法包括对包括排列成行和多个像素列的多个通道的校准条进行成像，其中每个通道包括多个水平相邻的像素，并且每个像素列包括来自 多个通道。 该方法还包括通过使通道标准化并且通过将像素列中的各个像素的强度与平均像素强度值进行比较来将污染物颗粒定位在像素列中来产生平均像素强度值。 小于低于归一化局部平均像素强度值的预定义限度的单个像素的强度值对应于污染物颗粒的位置。 所述方法还包括识别像素列中小于规范化局部平均像素强度值之下的预定极限集合的相邻像素的数量。

公开(公告)号：US06956581B2

公开(公告)日：2005-10-18

申请号：US10247590

申请日：2002-09-19

Applicant: Chengwu Cui ,  Raymond E. Clark

Inventor： Chengwu Cui ,  Raymond E. Clark

IPC: H04N1/60 ,  G06K9/00

CPC classification number: H04N1/6058

Abstract: A gamut mapping algorithm especially adapted for printing business and presentation graphics with highly chromatic colors. To perform gamut mapping, gamut triangles corresponding to an input gamut and output gamut are defined and used to scale the lightness and chroma of input colors. The rescaled input colors are then mapped to the output triangle along lines of constant chroma. The chroma of the remapped colors is enhanced by moving the remapped colors toward the apex of the output gamut triangle along a line passing through the remapped color and the apex of the output gamut triangle.

Abstract translation: 一种色域映射算法，特别适用于打印具有高色彩色彩的商业和演示图形。 为了执行色域映射，定义了与输入色域和输出色域对应的色域三角形，并用于缩放输入颜色的亮度和色度。 然后将重新调整的输入颜色映射到沿恒定色度线的输出三角形。 通过将重新映射的颜色沿着通过重新映射的颜色和输出色域三角形的顶点的线移动到输出色域三角形的顶点，来增强重新映射的色彩的色度。

公开(公告)号：US08833967B2

公开(公告)日：2014-09-16

申请号：US13444322

申请日：2012-04-11

Applicant: Chengwu Cui ,  Joshua Tyler Strow

Inventor： Chengwu Cui ,  Joshua Tyler Strow

IPC: F21V7/04 ,  F21V7/20

CPC classification number: F21V7/04 ,  F21V29/505 ,  H04N1/0281 ,  H04N1/0285 ,  H04N1/02865

Abstract: An illumination assembly for a scanner comprising a light source, a primary reflector and a secondary reflector. The primary reflector comprises a lower member and upper member spaced away from the lower member. The upper member has a heatsink for dissipating the heat of the light source. The light source is positioned between the lower and upper members and is attached to the upper member allowing for decreased vertical height for the illumination assembly.

Abstract translation: 一种用于扫描器的照明组件，包括光源，主反射器和次反射器。 主反射器包括下部构件和与下部构件间隔开的上部构件。 上部构件具有用于耗散光源的热量的散热器。 光源位于下部和上部构件之间并且附接到上部构件，允许照明组件的垂直高度减小。

公开(公告)号：US20120162726A1

公开(公告)日：2012-06-28

申请号：US12979797

申请日：2010-12-28

Applicant: Eugene David Allen ,  Chengwu Cui ,  Joshua Tyler Strow

Inventor： Eugene David Allen ,  Chengwu Cui ,  Joshua Tyler Strow

IPC: H04N1/04

CPC classification number: H04N1/00989 ,  H04N1/0285 ,  H04N1/02865

Abstract: An illumination assembly for a scanner according to one example embodiment includes a scan head frame. A thermally conductive heat sink component has an elongated base portion that is mounted along a longitudinal edge of the scan head frame and a protruding portion having a generally L-shaped structure that includes a first portion extending from the base portion and a second portion extending from and generally orthogonal to the first portion. A light source is coupled to the second portion of the protruding portion of the heat sink component. A first reflector is removably coupled to the first portion of the protruding portion of the heat sink component and is positioned directly in the optical path of the light source.

Abstract translation: 根据一个示例性实施例的用于扫描器的照明组件包括扫描头框架。 导热散热器部件具有沿着扫描头框架的纵向边缘安装的细长基部部分和具有大致L形结构的突出部分，该突出部分包括从基部延伸的第一部分和从基部延伸的第二部分 并且通常与第一部分正交。 光源耦合到散热器部件的突出部分的第二部分。 第一反射器可移除地耦合到散热器部件的突出部分的第一部分并且直接定位在光源的光路中。

公开(公告)号：US20110044036A1

公开(公告)日：2011-02-24

申请号：US12577927

申请日：2009-10-13

Applicant: Chengwu Cui ,  David Keith Jackson ,  Joshua Tyler Strow

Inventor： Chengwu Cui ,  David Keith Jackson ,  Joshua Tyler Strow

IPC: F21V1/00

CPC classification number: G03G21/1619 ,  G03G2221/1654 ,  G03G2221/1678

Abstract: A tubular structure with an opening defined thereon and having an inner surface and an outer surface. The tubular structure being substantially circular in shape and is made of a highly thermal conductive material. A plurality of light sources mounted on the inner surface of the tubular structure. The inner surface is coated with a diffused white coating. Light emitted from the plurality of light sources is reflected from the inner surface before exiting the tubular structure from the opening. This structure ensures emitting a uniform diffused light and prevents non-uniform illumination when disposed in an imaging forming device.

Abstract translation: 一种具有限定在其上并具有内表面和外表面的开口的管状结构。 该管状结构的形状基本上为圆形并由高导热材料制成。 安装在管状结构的内表面上的多个光源。 内表面涂有扩散的白色涂层。 从多个光源射出的光在从开口离开管状结构之前从内表面反射。 这种结构确保发射均匀的漫射光并且当设置在成像装置中时防止不均匀的照明。