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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。
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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。
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公开(公告)号：US20090043524A1
公开(公告)日：2009-02-12
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： G06F19/00
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。
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公开(公告)号：US20090033764A1
公开(公告)日：2009-02-05
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。
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5.发明授权Self calibration of white balance for a digital camera device using correlated color temperature data 有权使用相关色温数据自动校准数码相机设备的白平衡公开(公告)号：US08004566B2
公开(公告)日：2011-08-23
申请号：US12030814
申请日：2008-02-13
CPC分类号： H04N9/735 , H04N17/002
摘要： This disclosure describes automatic self-calibration techniques for digital camera devices. In one aspect, a method for performing a calibration procedure in a digital camera device comprises initiating the calibration procedure when a camera sensor of the digital camera device is operating, accumulating data for the calibration procedure, the data comprising one or more averages of correlated color temperature (CCT) associated with information captured by the camera sensor, calculating one or more CCT vectors based on the one or more averages of CCT, and generating gray point correction factors based on the one or more CCT vectors.
摘要翻译： 本公开描述了用于数码相机设备的自动自校准技术。 一方面，一种用于在数字照相机装置中执行校准程序的方法包括当数字照相机装置的照相机传感器正在操作时，启动校准程序，累积用于校准过程的数据，该数据包括相关颜色的一个或多个平均值 温度（CCT），其与由摄像机传感器捕获的信息相关联，基于CCT的一个或多个平均值计算一个或多个CCT向量，以及基于一个或多个CCT向量生成灰点校正因子。
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公开(公告)号：US07835637B2
公开(公告)日：2010-11-16
申请号：US11533620
申请日：2006-09-20
IPC分类号： G03B13/34
CPC分类号： G02B7/36 , H04N5/23212 , H04N5/3532
摘要： Techniques are described for predictive focus value calculation within image capture devices. Image capture devices may include digital still cameras and digital video cameras. The techniques include performing an auto-focus process within an image capture device by predicting a focus value for a scene at a lens position of a lens included in the image capture device based on a corrupt focus value for the lens position calculated from a first frame directly after lens settlement. Therefore, the auto-focus process may determine size and direction of movement for the lens to a next lens position based on the predicted valid focus value, and move the lens to the next lens position during a second frame. In this way, the techniques may move the lens to another lens position during each frame, greatly reducing auto-focus latency by potentially doubling or tripling the speed of the auto-focus process.
摘要翻译： 描述了用于在图像捕获装置内预测聚焦值计算的技术。 图像捕获设备可以包括数字静态照相机和数字摄像机。 这些技术包括通过基于从第一帧计算的透镜位置的损坏聚焦值预测图像拍摄装置中包括的透镜的透镜位置处的场景的焦点值来在图像拍摄装置内执行自动对焦处理 直接在镜头结算后。 因此，自动聚焦处理可以基于预测的有效焦点值来确定透镜到下一个透镜位置的移动的尺寸和方向，并且在第二帧期间将透镜移动到下一个透镜位置。 以这种方式，这些技术可以在每个帧期间将镜头移动到另一个镜头位置，通过将自动对焦过程的速度潜在地加倍或三倍大大降低了自动对焦延迟。
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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。
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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。
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公开(公告)号：US20090202235A1
公开(公告)日：2009-08-13
申请号：US12030827
申请日：2008-02-13
CPC分类号： H04N5/23212
摘要： The disclosure relates to techniques for calibration of an auto-focus process in an image capture device. The techniques may involve calibration of a lens actuator used to move a lens within a search range during an auto-focus process. For example, an image capture device may adjust reference positions for the search range based on lens positions selected for different focus conditions. The different focus conditions may include a far focus condition and a near focus condition. The focus conditions may be determined based on a detected environment in which the device is used. Detection of an indoor environment may indicate a likelihood of near object focus, while detection of an outdoor environment may indicate a likelihood of far object focus. An image capture device may detect indoor and outdoor environments based on lighting, exposure, or other conditions.
摘要翻译： 本公开涉及用于在图像捕获装置中校准自动对焦过程的技术。 这些技术可以涉及在自动对焦过程期间校准用于在搜索范围内移动透镜的透镜致动器。 例如，图像拍摄装置可以基于为不同聚焦条件选择的镜头位置来调整搜索范围的参考位置。 不同的对焦条件可以包括远焦点条件和近焦点条件。 可以基于使用该设备的检测环境来确定聚焦条件。 室内环境的检测可以指示近物体聚焦的可能性，而室外环境的检测可以指示远对象聚焦的可能性。 图像捕获装置可以基于照明，曝光或其他条件检测室内和室外环境。
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公开(公告)号：US20080069553A1
公开(公告)日：2008-03-20
申请号：US11533620
申请日：2006-09-20
CPC分类号： G02B7/36 , H04N5/23212 , H04N5/3532
摘要： Techniques are described for predictive focus value calculation within image capture devices. Image capture devices may include digital still cameras and digital video cameras. The techniques include performing an auto-focus process within an image capture device by predicting a focus value for a scene at a lens position of a lens included in the image capture device based on a corrupt focus value for the lens position calculated from a first frame directly after lens settlement. Therefore, the auto-focus process may determine size and direction of movement for the lens to a next lens position based on the predicted valid focus value, and move the lens to the next lens position during a second frame. In this way, the techniques may move the lens to another lens position during each frame, greatly reducing auto-focus latency by potentially doubling or tripling the speed of the auto-focus process.
摘要翻译： 描述了用于在图像捕获装置内预测聚焦值计算的技术。 图像捕获设备可以包括数字静态照相机和数字摄像机。 这些技术包括通过基于从第一帧计算的透镜位置的损坏聚焦值预测图像拍摄装置中包括的透镜的透镜位置处的场景的焦点值来在图像拍摄装置内执行自动对焦处理 直接在镜头结算后。 因此，自动聚焦处理可以基于预测的有效焦点值来确定透镜到下一个透镜位置的移动的尺寸和方向，并且在第二帧期间将透镜移动到下一个透镜位置。 以这种方式，这些技术可以在每个帧期间将镜头移动到另一个镜头位置，通过将自动对焦过程的速度潜在地加倍或三倍大大降低了自动对焦延迟。
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