公开(公告)号：WO2009021139A2

公开(公告)日：2009-02-12

申请号：PCT/US2008072527

申请日：2008-08-07

Applicant: QUALCOMM INC ,  HUNG SZEPO ROBERT ,  LI JINGQIANG ,  LI HSIANG-TSUN ,  ZHONG XIN

Inventor： HUNG SZEPO ROBERT ,  LI JINGQIANG ,  LI HSIANG-TSUN ,  ZHONG XIN

IPC: G06T5/00

CPC classification number: G06T5/006 ,  G06T3/4007

Abstract: 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.

Abstract translation: 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：WO2008070348A1

公开(公告)日：2008-06-12

申请号：PCT/US2007/082748

申请日：2007-10-26

Applicant: QUALCOMM INCORPORATED ,  HSU, De Dzwo ,  LI, Hsiang-Tsun ,  HUNG, Szepo Robert

Inventor： HSU, De Dzwo ,  LI, Hsiang-Tsun ,  HUNG, Szepo Robert

IPC: H04N1/60 ,  H04N9/73

CPC classification number: H04N9/735 ,  H04N1/6027 ,  H04N1/6077 ,  H04N1/6086 ,  H04N1/6088

Abstract: Automatic white balance of captured images can be performed based on a gray world assumption. One aspect relates to an apparatus comprising a collection module and a processor. The collection module is configured to accumulate (a) red/green and blue/green color ratio values of a plurality of pixels in a captured image for each cluster of a plurality of clusters and (b) a number of pixels having red/green and blue/green color ratios associated with each cluster, the clusters comprising daylight, fluorescent, incandescent, and a outdoor green zone. The processor is configured to determine which cluster has a highest accumulated number of pixels, and use the cluster with the highest accumulated number of pixels to perform white balancing for the captured image.

Abstract translation: 可以基于灰色世界假设执行拍摄图像的自动白平衡。 一个方面涉及一种包括收集模块和处理器的装置。 收集模块被配置为在多个聚类的每个聚类的累积图像中累积（a）多个像素中的多个像素的红色/绿色和蓝色/绿色比值，以及（b）具有红/绿色的像素数， 与每个簇相关联的蓝/绿色比，簇包括日光，荧光，白炽和室外绿色区。 处理器被配置为确定哪个集群具有最高的累积像素数，并且使用具有最高累积像素数的集群来执行拍摄图像的白平衡。

公开(公告)号：WO2008036850A2

公开(公告)日：2008-03-27

申请号：PCT/US2007/079085

申请日：2007-09-20

Applicant: QUALCOMM Incorporated ,  JIANG, Xiaoyun ,  QUAN, Shuxue ,  CHIU, Chinchuan Andrew ,  HUNG, Szepo Robert ,  VELARDE, Ruben M. ,  NOYES, Ying Xie

Inventor： JIANG, Xiaoyun ,  QUAN, Shuxue ,  CHIU, Chinchuan Andrew ,  HUNG, Szepo Robert ,  VELARDE, Ruben M. ,  NOYES, Ying Xie

CPC classification number: H04N9/646

Abstract: Apparatus are provided including an image signal carrier, a luminance information evaluator, and a chrominance information modifier. The image signal carrier is encoded with an image signal including luminance information and chrominance information. The luminance information evaluator evaluates the luminance information in the image signal for a given region within the image to identify when the given region is one of substantially white and substantially dark. The chrominance information modifier is provided to modify the chrominance information corresponding to the given region when the given region is one of substantially white and substantially dark

Abstract translation: 提供了包括图像信号载体，亮度信息评估器和色度信息修饰符的装置。 图像信号载体用包括亮度信息和色度信息的图像信号进行编码。 亮度信息评估器评估图像内的给定区域的图像信号中的亮度信息，以识别给定区域何时是基本上白色且基本上暗的一个。 提供色度信息修改器以在给定区域是基本上白色和基本上为黑色之一时修改对应于给定区域的色度信息

公开(公告)号：WO2007120321A3

公开(公告)日：2007-10-25

申请号：PCT/US2006/061818

申请日：2006-12-08

Applicant: QUALCOMM INCORPORATED ,  NOYES, Ying Xie ,  HUNG, Szepo Robert

Inventor： NOYES, Ying Xie ,  HUNG, Szepo Robert

IPC: H04N9/73

Abstract: An imaging system generates a gain for a component of an image format. The gain is at least partially dependent on the brightness of the light source illuminating a scene when an image of the scene was generated. The gain can be used to correct the component of the image format for the color shift in the image caused by the light source. In some instances, the imaging system generates a gain for a plurality of the components of the image format or for all of the components of the image format. The gains can be used to correct the components for the color shift in the image caused by the light source.