公开(公告)号：WO2009003043A3

公开(公告)日：2009-07-09

申请号：PCT/US2008068198

申请日：2008-06-25

Applicant: APPLE INC ,  BARNHOEFER ULRICH T ,  CORLETT BARRY J ,  ALESSI VICTOR E ,  YAO WEI H ,  CHEN WEI

Inventor： BARNHOEFER ULRICH T ,  CORLETT BARRY J ,  ALESSI VICTOR E ,  YAO WEI H ,  CHEN WEI

IPC: G09G3/34 ,  G09G3/36 ,  H04N5/44

CPC classification number: G09G3/3611 ,  G09G3/3406 ,  G09G2310/0232 ,  G09G2320/0247 ,  G09G2320/0271 ,  G09G2320/0606 ,  G09G2320/0626 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2320/0673 ,  G09G2330/021 ,  G09G2340/16 ,  G09G2360/16 ,  Y10S348/913

Abstract: Embodiments of a system (450) that includes one or more integrated circuits are described. During operation of the system, an interface in the one or more integrated circuits receives video signals (412) associated with a video image and a brightness setting (414) of a light source which illuminates a display that displays the video image. Next, an extraction circuit (462), which is electrically coupled to the input interface, calculates a brightness metric associated with the video image based on the received video signals. Then, an analysis circuit (464), electrically coupled to the extraction circuit, analyzes the brightness metric to identify one or more subsets (510, 512, 560) of the video image, and an intensity circuit (470), electrically coupled to the analysis circuit, determines an intensity setting (418) of the light source based on the brightness setting and a first portion of the brightness metric associated with one of the subsets of the video image. Note that this subset of the video image includes spatially varying visual information (510) in the video image. Moreover, an output interface, electrically coupled to the intensity circuit, outputs the intensity setting of the light source.

Abstract translation: 描述包括一个或多个集成电路的系统（450）的实施例。 在系统的操作期间，一个或多个集成电路中的接口接收与视频图像相关联的视频信号（412）和照亮显示视频图像的显示器的光源的亮度设置（414）。 接下来，电耦合到输入接口的提取电路（462）基于接收到的视频信号计算与视频图像相关联的亮度度量。 然后，电耦合到提取电路的分析电路（464）分析亮度度量以识别视频图像的一个或多个子集（510,512,560），以及强度电路（470），电耦合到 分析电路基于亮度设置和与视频图像的子集之一相关联的亮度度量的第一部分确定光源的强度设置（418）。 注意，视频图像的该子集包括视频图像中的空间变化的视觉信息（510）。 此外，电耦合到强度电路的输出接口输出光源的强度设置。

公开(公告)号：WO2009003043A2

公开(公告)日：2008-12-31

申请号：PCT/US2008/068198

申请日：2008-06-25

Applicant: APPLE INC. ,  BARNHOEFER, Ulrich T. ,  CORLETT, Barry J. ,  ALESSI, Victor E. ,  YAO, Wei H. ,  CHEN, Wei

Inventor： BARNHOEFER, Ulrich T. ,  CORLETT, Barry J. ,  ALESSI, Victor E. ,  YAO, Wei H. ,  CHEN, Wei

IPC: G09G3/34 ,  G09G3/36 ,  H04N5/44

CPC classification number: G09G3/3611 ,  G09G3/3406 ,  G09G2310/0232 ,  G09G2320/0247 ,  G09G2320/0271 ,  G09G2320/0606 ,  G09G2320/0626 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2320/0673 ,  G09G2330/021 ,  G09G2340/16 ,  G09G2360/16 ,  Y10S348/913

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation of the system, an interface in the one or more integrated circuits receives video signals associated with a video image and a brightness setting of a light source which illuminates a display that displays the video image. Next, an extraction circuit, which is electrically coupled to the input interface, calculates a brightness metric associated with the video image based on the received video signals. Then, an analysis circuit, electrically coupled to the extraction circuit, analyzes the brightness metric to identify one or more subsets of the video image, and an intensity circuit, electrically coupled to the analysis circuit, determines an intensity setting of the light source based on the brightness setting and a first portion of the brightness metric associated with one of the subsets of the video image. Note that this subset of the video image includes spatially varying visual information in the video image. Moreover, an output interface, electrically coupled to the intensity circuit, outputs the intensity setting of the light source.

Abstract translation: 描述包括一个或多个集成电路的系统的实施例。 在系统操作期间，一个或多个集成电路中的接口接收与视频图像相关联的视频信号和照亮显示视频图像的显示器的光源的亮度设置。 接下来，电耦合到输入接口的提取电路基于接收到的视频信号计算与视频图像相关联的亮度度量。 然后，电耦合到提取电路的分析电路分析亮度度量以识别视频图像的一个或多个子集，并且电耦合到分析电路的强度电路基于 亮度设置和与视频图像的子集之一相关联的亮度度量的第一部分。 注意，视频图像的该子集包括视频图像中的空间变化的视觉信息。 此外，电耦合到强度电路的输出接口输出光源的强度设置。

公开(公告)号：WO2009003041A2

公开(公告)日：2008-12-31

申请号：PCT/US2008/068196

申请日：2008-06-25

Applicant: APPLE INC. ,  BARNHOEFER, Ulrich, T. ,  CORLETT, Barry, J. ,  ALESSI, Victor, E. ,  YAO, Wei, H. ,  CHEN, Wei

Inventor： BARNHOEFER, Ulrich, T. ,  CORLETT, Barry, J. ,  ALESSI, Victor, E. ,  YAO, Wei, H. ,  CHEN, Wei

CPC classification number: G09G3/3406 ,  G09G3/3611 ,  G09G2300/0452 ,  G09G2310/0232 ,  G09G2320/0242 ,  G09G2320/0247 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2320/066 ,  G09G2320/0666 ,  G09G2330/021 ,  G09G2360/16

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system transforms the video image from an initial brightness domain to a linear brightness domain, which includes a range of brightness values corresponding to substantially equidistant adjacent radiant-power values in a displayed video image. In this linear brightness domain, the system may determine an intensity setting of the light source based on at least a portion of the transformed video image, such as the portion of the transformed video image that includes spatially varying visual information in the video image. Moreover, the system may modify the transformed video image so that a product of the intensity setting and a transmittance associated with the modified video image approximately equals a product of a previous intensity setting and a transmittance associated with the video image. For example, the modification may include changing brightness values in the transformed video image.

Abstract translation: 描述包括一个或多个集成电路的系统的实施例。 在操作期间，系统将视频图像从初始亮度域转换为线性亮度域，其包括对应于所显示的视频图像中的基本上等距的相邻辐射功率值的亮度值的范围。 在该线性亮度域中，系统可以基于变换的视频图像的至少一部分来确定光源的强度设置，诸如包括视频图像中的空间变化的视觉信息的经变换的视频图像的部分。 此外，系统可以修改变换的视频图像，使得强度设置和与修改的视频图像相关联的透射率的乘积近似等于先前的强度设置和与视频图像相关联的透射率的乘积。 例如，修改可以包括改变变换的视频图像中的亮度值。

公开(公告)号：WO2009003041A3

公开(公告)日：2009-07-02

申请号：PCT/US2008068196

申请日：2008-06-25

Applicant: APPLE INC ,  BARNHOEFER ULRICH T ,  CORLETT BARRY J ,  ALESSI VICTOR E ,  YAO WEI H ,  CHEN WEI

Inventor： BARNHOEFER ULRICH T ,  CORLETT BARRY J ,  ALESSI VICTOR E ,  YAO WEI H ,  CHEN WEI

IPC: G09G3/34 ,  G09G3/36

CPC classification number: G09G3/3406 ,  G09G3/3611 ,  G09G2300/0452 ,  G09G2310/0232 ,  G09G2320/0242 ,  G09G2320/0247 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2320/066 ,  G09G2320/0666 ,  G09G2330/021 ,  G09G2360/16

Abstract: Embodiments of a system (730) that includes one or more integrated circuits are described. During operation, the system transforms (742-1) the video image (712) from an initial brightness domain to a linear brightness domain, which includes a range of brightness values corresponding to substantially equidistant adjacent radiant-power values in a displayed video image. In this linear brightness domain, the system may determine an intensity setting (718) of the light source based on at least a portion of the transformed video image, such as the portion of the transformed video image that includes spatially varying visual information in the video image. Moreover, the system may modify (748) the transformed video image so that a product of the intensity setting and a transmittance associated with the modified video image approximately equals a product of a previous intensity setting (718) and a transmittance associated with the video image (716). For example, the modification may include changing brightness values in the transformed video image.

Abstract translation: 描述包括一个或多个集成电路的系统（730）的实施例。 在操作期间，系统将视频图像（712）从初始亮度域（742-1）变换为线性亮度域，其包括对应于所显示的视频图像中的基本等距的相邻辐射功率值的亮度值的范围。 在该线性亮度域中，系统可以基于变换的视频图像的至少一部分来确定光源的强度设置（718），诸如包括视频中的空间变化的视觉信息的经变换的视频图像的部分 图片。 此外，系统可以修改（748）变换的视频图像，使得强度设置和与修改的视频图像相关联的透射率的乘积近似等于先前的强度设置（718）和与视频图像相关联的透射率的乘积 （716）。 例如，修改可以包括改变变换的视频图像中的亮度值。

公开(公告)号：WO2009082506A1

公开(公告)日：2009-07-02

申请号：PCT/US2008/068194

申请日：2008-06-25

Applicant: APPLE INC. ,  BARNHOEFER, Ulrich, T. ,  CORLETT, Barry, J. ,  ALESSI, Victor, E. ,  YAO, Wei, H. ,  CHEN, Wei

Inventor： BARNHOEFER, Ulrich, T. ,  CORLETT, Barry, J. ,  ALESSI, Victor, E. ,  YAO, Wei, H. ,  CHEN, Wei

IPC: H04N5/58 ,  G06T5/00

CPC classification number: H04N5/58 ,  G06T5/008 ,  G09G3/3406 ,  G09G3/3611 ,  G09G2320/0247 ,  G09G2320/0271 ,  G09G2320/0646 ,  G09G2320/066 ,  G09G2330/021 ,  G09G2360/16 ,  H04N21/44008 ,  H04N21/4402

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system may determine an intensity setting of the light source based on at least a portion of a video image, such as the portion of the transformed video image that includes spatially varying visual information in the video image. Moreover, the system may modify the video image so that a product of the intensity setting and a transmittance associated with the modified video image approximately equals a product of a previous intensity setting and a transmittance associated with the video image. For example, the modification may include scaling brightness values in the transformed video image. Next, the system may identify a region in the video image in which the scaling of the brightness values results in a visual artifact associated with reduced contrast. For example, the region may include a bright region surrounded by a darker region. Then, the system may reduce the scaling of the brightness values in the region to, at least partially, restore the contrast, thereby reducing the visual artifact. Additionally, the system may spatially filter the brightness values in the video image to reduce a spatial discontinuity between the brightness values of pixels within the region and the brightness values in a remainder of the video image.

Abstract translation: 描述包括一个或多个集成电路的系统的实施例。 在操作期间，系统可以基于视频图像的至少一部分来确定光源的强度设置，诸如包括视频图像中的空间变化的视觉信息的经变换的视频图像的部分。 此外，系统可以修改视频图像，使得强度设置和与修改的视频图像相关联的透射率的乘积近似等于先前的强度设置和与视频图像相关联的透射率的乘积。 例如，修改可以包括缩放经变换的视频图像中的亮度值。 接下来，系统可以识别视频图像中的亮度值的缩放导致与降低的对比度相关联的视觉伪影的区域。 例如，该区域可以包括被较暗区域包围的亮区域。 然后，该系统可以减少该区域中的亮度值的缩放，至少部分恢复对比度，由此减少视觉伪像。 另外，该系统可以对视频图像中的亮度值进行空间滤波，以减少该区域内像素的亮度值与视频图像的其余部分中的亮度值之间的空间不连续性。