公开(公告)号：US08596541B2

公开(公告)日：2013-12-03

申请号：US12035644

申请日：2008-02-22

申请人： Chinchuan Andrew Chiu ,  Jingqiang Li ,  Hau Hwang ,  Hsiang-Tsun Li ,  Stephen Horton ,  Xiaoyun Jiang ,  Joseph Cheung

发明人： Chinchuan Andrew Chiu ,  Jingqiang Li ,  Hau Hwang ,  Hsiang-Tsun Li ,  Stephen Horton ,  Xiaoyun Jiang ,  Joseph Cheung

IPC分类号： G06K7/10

CPC分类号： G06K7/14 ,  G06K7/1417 ,  G06K7/1443 ,  G06K7/1447 ,  G07G1/0045

摘要： This disclosure describes barcode scanning techniques for an image capture device. The image capture device may automatically detect a barcode within an image while the image capture device is operating in a non-barcode image capture mode, such a default image capture mode. In one aspect, the detection of the barcode within the image may be based on a combination of identified edges and low intensity regions within the image. The image capture device may configure, based on the detection of the barcode, one or more image capture properties associated with the image capture device to improve a quality at which the images are captured. The image capture device captures the image in accordance with the configured image capture properties. The techniques may effectively provide a universal and integrated front-end for producing improved quality images of barcodes without requiring significant interaction with a user via a complicated user interface.

摘要翻译： 本公开描述了用于图像捕获设备的条形码扫描技术。 当图像捕获装置以非条形码图像捕获模式操作时，图像捕获装置可以自动检测图像内的条形码，这种默认图像拍摄模式。 在一个方面，图像内的条形码的检测可以基于图像内的识别边缘和低强度区域的组合。 图像捕获装置可以基于条形码的检测来配置与图像捕获装置相关联的一个或多个图像拍摄属性，以提高拍摄图像的质量。 图像捕获设备根据配置的图像捕获属性捕获图像。 这些技术可以有效地提供通用和集成的前端，用于产生条形码的改进的质量图像，而不需要通过复杂的用户界面与用户进行显着的交互。

公开(公告)号：US20090212112A1

公开(公告)日：2009-08-27

申请号：US12035653

申请日：2008-02-22

申请人： Hsiang-Tsun Li ,  Jingqiang Li ,  Hau Hwang ,  Xiaoyun Jiang ,  Joseph Cheung

发明人： Hsiang-Tsun Li ,  Jingqiang Li ,  Hau Hwang ,  Xiaoyun Jiang ,  Joseph Cheung

IPC分类号： G06K7/10

CPC分类号： G06K7/10 ,  G06K7/1443 ,  G06K7/1452

摘要： This disclosure describes techniques for detecting a barcode within an image. An image processor may, for example, process an image to detect regions within the image that may be barcodes. The image processor may identify regions of the image that exhibit a high concentration of edges and a high concentration of pixels with low optical intensity co-instantaneously as potential barcodes. The image processor may identify the regions using a number of morphological operations. The image processor may then determine whether the identified regions are actually barcodes by verifying whether the region have unique barcode features. The barcode detection techniques described in this disclosure may be independent of barcode size, location and orientation within the image. Moreover, the use of morphological operations results in faster and more computationally efficient barcode detection, as well as lower computational complexity.

摘要翻译： 本公开描述了用于检测图像内的条形码的技术。 图像处理器可以例如处理图像以检测图像内可能是条形码的区域。 图像处理器可以识别呈现高浓度边缘的图像区域和具有低光强度的高浓度像素作为潜在条形码。 图像处理器可以使用多个形态操作来识别区域。 然后，图像处理器可以通过验证该区域是否具有独特的条形码特征来确定所识别的区域是否实际上是条形码。 本公开中描述的条形码检测技术可以独立于图像内的条形码尺寸，位置和取向。 此外，使用形态学运算导致更快和更有计算效率的条形码检测，以及较低的计算复杂度。

公开(公告)号：US20090212113A1

公开(公告)日：2009-08-27

申请号：US12035644

申请日：2008-02-22

申请人： Chinchuan Andrew Chiu ,  Jingqiang Li ,  Hau Hwang ,  Hsiang-Tsun Li ,  Stephen Horton ,  Xiaoyun Jiang ,  Joseph Cheung

发明人： Chinchuan Andrew Chiu ,  Jingqiang Li ,  Hau Hwang ,  Hsiang-Tsun Li ,  Stephen Horton ,  Xiaoyun Jiang ,  Joseph Cheung

IPC分类号： G06K7/10

CPC分类号： G06K7/14 ,  G06K7/1417 ,  G06K7/1443 ,  G06K7/1447 ,  G07G1/0045

摘要： This disclosure describes barcode scanning techniques for an image capture device. The image capture device may automatically detect a barcode within an image while the image capture device is operating in a non-barcode image capture mode, such a default image capture mode. In one aspect, the detection of the barcode within the image may be based on a combination of identified edges and low intensity regions within the image. The image capture device may configure, based on the detection of the barcode, one or more image capture properties associated with the image capture device to improve a quality at which the images are captured. The image capture device captures the image in accordance with the configured image capture properties. The techniques may effectively provide a universal and integrated front-end for producing improved quality images of barcodes without requiring significant interaction with a user via a complicated user interface.

摘要翻译： 本公开描述了用于图像捕获设备的条形码扫描技术。 当图像捕获装置以非条形码图像捕获模式操作时，图像捕获装置可以自动检测图像内的条形码，这种默认图像拍摄模式。 在一个方面，图像内的条形码的检测可以基于图像内的识别边缘和低强度区域的组合。 图像捕获装置可以基于条形码的检测来配置与图像捕获装置相关联的一个或多个图像拍摄属性，以提高拍摄图像的质量。 图像捕获设备根据配置的图像捕获属性捕获图像。 这些技术可以有效地提供通用和集成的前端，用于产生条形码的改进的质量图像，而不需要通过复杂的用户界面与用户进行显着的交互。

公开(公告)号：US08366004B2

公开(公告)日：2013-02-05

申请号：US12035653

申请日：2008-02-22

申请人： Hsiang-Tsun Li ,  Jingqiang Li ,  Hau Hwang ,  Xiaoyun Jiang ,  Joseph Cheung

发明人： Hsiang-Tsun Li ,  Jingqiang Li ,  Hau Hwang ,  Xiaoyun Jiang ,  Joseph Cheung

IPC分类号： G06K5/04

CPC分类号： G06K7/10 ,  G06K7/1443 ,  G06K7/1452

摘要： This disclosure describes techniques for detecting a barcode within an image. An image processor may, for example, process an image to detect regions within the image that may be barcodes. The image processor may identify regions of the image that exhibit a high concentration of edges and a high concentration of pixels with low optical intensity co-instantaneously as potential barcodes. The image processor may identify the regions using a number of morphological operations. The image processor may then determine whether the identified regions are actually barcodes by verifying whether the region have unique barcode features. The barcode detection techniques described in this disclosure may be independent of barcode size, location and orientation within the image. Moreover, the use of morphological operations results in faster and more computationally efficient barcode detection, as well as lower computational complexity.

摘要翻译： 本公开描述了用于检测图像内的条形码的技术。 图像处理器可以例如处理图像以检测图像内可能是条形码的区域。 图像处理器可以识别呈现高浓度边缘的图像区域和具有低光强度的高浓度像素作为潜在条形码。 图像处理器可以使用多个形态操作来识别区域。 然后，图像处理器可以通过验证该区域是否具有独特的条形码特征来确定所识别的区域是否实际上是条形码。 本公开中描述的条形码检测技术可以独立于图像内的条形码尺寸，位置和取向。 此外，使用形态学运算导致更快和更有计算效率的条形码检测，以及较低的计算复杂度。

公开(公告)号：US08384801B2

公开(公告)日：2013-02-26

申请号：US11831612

申请日：2007-07-31

申请人： Szepo Robert Hung ,  Hsiang-Tsun Li ,  Jingqiang Li

发明人： Szepo Robert Hung ,  Hsiang-Tsun Li ,  Jingqiang Li

IPC分类号： H04N5/235

CPC分类号： G03B7/093 ,  H04N5/2351 ,  H04N5/2353 ,  H04N5/243 ,  H04N2007/145

摘要： A device has a processing unit to implement a set of operations to use both luma and chroma information from a scene of an image to dynamically adjust exposure time and sensor gain. The processing unit collects bright near grey pixels and high chroma pixels in the scene. Based on the collected pixels, brightness of the near grey pixels is increased to a predetermined level without saturation. At the same time, the high chroma pixels are kept away from saturation.

摘要翻译： 一种设备具有处理单元，用于实现一组操作，以使用来自图像场景的亮度和色度信息来动态地调整曝光时间和传感器增益。 处理单元收集场景中明亮的近灰色像素和高色度像素。 基于所收集的像素，近灰色像素的亮度增加到预定的水平而不饱和。 同时，高色度像素远离饱和度。

公开(公告)号：US08023758B2

公开(公告)日：2011-09-20

申请号：US11835220

申请日：2007-08-07

申请人： Szepo Robert Hung ,  Jingqiang Li ,  Hsiang-Tsun Li ,  Xin Zhong

发明人： Szepo Robert Hung ,  Jingqiang Li ,  Hsiang-Tsun Li ,  Xin Zhong

IPC分类号： G06K9/40

CPC分类号： G06T5/006 ,  G06T3/4007

摘要： A two-dimensional (2D) mesh is applied over a distortion surface to approximate a lens roll-off distortion pattern. The process to apply the 2D mesh distributes a plurality of grid points among the distortion pattern and sub-samples the distortion pattern to derive corrected digital gains at each grid location. Non-grid pixels underlying grid blocks having a grid point at each corner are adjusted based on the approximation of the lens roll-off for the grid points of the grid block. In one example, bilinear interpolation is used. The techniques universally correct lens roll-off distortion irregardless of the distortion pattern shape or type. The technique may also correct for green channel imbalance.

摘要翻译： 将二维（2D）网格施加在失真表面上以近似透镜滚降失真图案。 应用2D网格的过程在失真模式中分配多个网格点，并对失真模式进行子采样，以在每个网格位置导出校正的数字增益。 基于网格块的网格点的镜头滚降的近似来调整在每个角上具有网格点的网格块下方的非网格像素。 在一个示例中，使用双线性插值。 这些技术无损于失真图案的形状或类型，普遍地校正镜头滚降。 该技术也可能纠正绿色通道不平衡。

公开(公告)号：US20070269124A1

公开(公告)日：2007-11-22

申请号：US11533664

申请日：2006-09-20

申请人： Hsiang-Tsun Li ,  Szepo Robert Huang ,  Xiaoyun Jiang

发明人： Hsiang-Tsun Li ,  Szepo Robert Huang ,  Xiaoyun Jiang

IPC分类号： G06K9/40 ,  G06K9/34

CPC分类号： H04N5/235 ,  G06K9/38 ,  G06K2209/01 ,  G06T3/40 ,  G06T7/12 ,  G06T2207/20132 ,  G06T2207/30176 ,  H04N1/3873

摘要： Methods and apparatus for processing a captured image of a medium, content on the medium, and a background surrounding the medium are provided. A captured image is processed by 1) improving the visibility of the content by recovering the original appearance of the medium and enhancing the appearance of the content image, 2) removing the background by determining the boundary of the medium, and/or 3) correcting geometric distortion in the content to improve readability. Any of the three processing steps may be used alone or any combination of the three processing steps may be used to process the image. The image processing may operate on the image after it is captured and stored to a memory and may be implemented on an image-capturing device that captures the image. In other embodiments, the image processing is implemented on another device that receives the image from the image-capturing device.

摘要翻译： 提供了处理介质的捕获图像，介质上的内容以及介质周围的背景的方法和装置。 处理拍摄图像1）通过恢复介质的原始外观和增强内容图像的外观来提高内容的可视性，2）通过确定介质的边界来消除背景，和/或3）校正 几何失真的内容提高了可读性。 可以单独使用三个处理步骤中的任何一个，或者可以使用三个处理步骤的任何组合来处理图像。 图像处理可以在被捕获并且被存储到存储器之后对图像进行操作，并且可以在捕获图像的图像捕获装置上实现。 在其他实施例中，图像处理在从图像捕获设备接收图像的另一设备上实现。

公开(公告)号：US20100158363A1

公开(公告)日：2010-06-24

申请号：US12340545

申请日：2008-12-19

申请人： XIAOYUN JIANG ,  Szepo R. Hung ,  Hsiang-Tsun Li ,  Babak Forutanpour

发明人： XIAOYUN JIANG ,  Szepo R. Hung ,  Hsiang-Tsun Li ,  Babak Forutanpour

IPC分类号： G06K9/00

CPC分类号： G06K9/4652

摘要： In a particular embodiment, a method is disclosed that includes performing a first test using a first pixel value of a pixel to determine whether the pixel is outside a skin color region of a color space. The method includes, when the first test does not identify the pixel as outside the skin color region, performing a second test using a second pixel value of the pixel to determine whether the pixel is outside the skin color region of the color space. The method further includes, when the second test does not identify the pixel as outside the skin color region, performing a third test using a third pixel value of the pixel to determine whether the pixel is outside the skin color region of the color space.

摘要翻译： 在特定实施例中，公开了一种方法，其包括使用像素的第一像素值执行第一测试以确定像素是否在颜色空间的肤色区域之外。 该方法包括：当第一测试不将像素识别为皮肤颜色区域外时，使用像素的第二像素值执行第二测试以确定像素是否在颜色空间的肤色区域之外。 该方法还包括当第二测试不将像素识别为皮肤颜色区域外时，使用像素的第三像素值执行第三测试以确定像素是否在颜色空间的肤色区域之外。

公开(公告)号：US20100322532A1

公开(公告)日：2010-12-23

申请号：US12488737

申请日：2009-06-22

申请人： Xiaoyun Jiang ,  Szepo R. Hung ,  Hsiang-Tsun Li

发明人： Xiaoyun Jiang ,  Szepo R. Hung ,  Hsiang-Tsun Li

IPC分类号： G06K9/40

CPC分类号： H04N5/235 ,  G06T5/006 ,  G06T2207/20004 ,  G06T2207/20021 ,  H04N5/2178

摘要： A method is disclosed that includes receiving image data and calculating brightness information of the image data. The method includes correcting at least one lens roll-off value to be used in a lens roll-off correction operation based on the brightness information. The method also includes performing the lens roll-off correction operation on the image data using the at least one corrected lens roll-off value.

摘要翻译： 公开了一种包括接收图像数据并计算图像数据的亮度信息的方法。 该方法包括基于亮度信息校正要用于镜头滚降校正操作中的至少一个镜头滚降值。 该方法还包括使用至少一个校正的镜头滚降值对图像数据执行镜头滚降校正操作。

公开(公告)号：US07724953B2

公开(公告)日：2010-05-25

申请号：US11533664

申请日：2006-09-20

申请人： Hsiang-Tsun Li ,  Szepo Robert Hung ,  Xiaoyun Jiang

发明人： Hsiang-Tsun Li ,  Szepo Robert Hung ,  Xiaoyun Jiang

IPC分类号： G06K9/34

CPC分类号： H04N5/235 ,  G06K9/38 ,  G06K2209/01 ,  G06T3/40 ,  G06T7/12 ,  G06T2207/20132 ,  G06T2207/30176 ,  H04N1/3873

摘要： Methods and apparatus for processing a captured image of a medium, content on the medium, and a background surrounding the medium are provided. A captured image is processed by 1) improving the visibility of the content by recovering the original appearance of the medium and enhancing the appearance of the content image, 2) removing the background by determining the boundary of the medium, and/or 3) correcting geometric distortion in the content to improve readability. Any of the three processing steps may be used alone or any combination of the three processing steps may be used to process the image. The image processing may operate on the image after it is captured and stored to a memory and may be implemented on an image-capturing device that captures the image. In other embodiments, the image processing is implemented on another device that receives the image from the image-capturing device.

摘要翻译： 提供了处理介质的捕获图像，介质上的内容以及介质周围的背景的方法和装置。 处理拍摄图像1）通过恢复介质的原始外观和增强内容图像的外观来提高内容的可视性，2）通过确定介质的边界来消除背景，和/或3）校正 几何失真的内容提高了可读性。 可以单独使用三个处理步骤中的任何一个，或者可以使用三个处理步骤的任何组合来处理图像。 图像处理可以在被捕获并且被存储到存储器之后对图像进行操作，并且可以在捕获图像的图像捕获装置上实现。 在其他实施例中，图像处理在从图像捕获设备接收图像的另一设备上实现。