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    Automatic exposure estimation for HDR images based on image statistics
    2.
    发明授权
    Automatic exposure estimation for HDR images based on image statistics 有权
    基于图像统计的HDR图像自动曝光估算

    公开(公告)号：US08346009B2

    公开(公告)日：2013-01-01

    申请号：US12803370

    申请日：2010-06-25

    申请人： Jiefu Zhai ,  Joan Llach ,  Zhe Wang

    发明人： Jiefu Zhai ,  Joan Llach ,  Zhe Wang

    IPC分类号： G06K9/36

    CPC分类号： H04N5/202 ,  G09G3/2003 ,  G09G2340/0428 ,  G09G2340/06

    摘要： A method for tone mapping high dynamic range images for display on low dynamic range displays wherein high dynamic range images are first accessed. The high dynamic range images are divided the into different regions such that each region is represented by a matrix, where each element of the matrix is a weight or probability of a pixel value. An exposure of each region is determined or calculated by estimating an anchor point in each region such that most pixels in each region are mapped to mid grey and the anchor points are adjusted to a key of the images to preserve overall brightness. The regions are then placed or mapped to zones and exposure values are applied to the regions responsive to the weight or probability. The regions are fused together to obtain a final tone mapped image.

    摘要翻译： 一种用于将高动态范围图像进行色调映射以在低动态范围显示器上显示的方法，其中首先访问高动态范围图像。 高动态范围图像被划分成不同的区域，使得每个区域由矩阵表示，其中矩阵的每个元素是像素值的权重或概率。 通过估计每个区域中的锚点来确定或计算每个区域的曝光，使得每个区域中的大多数像素被映射到中间灰色，并且将锚点调整为图像的关键以保持整体亮度。 然后将区域放置或映射到区域，并且响应于重量或概率将曝光值应用于区域。 将这些区域融合在一起以获得最终的色调映射图像。

    INTERACTIVE TONE MAPPING FOR HIGH DYNAMIC RANGE VIDEO
    3.
    发明申请
    INTERACTIVE TONE MAPPING FOR HIGH DYNAMIC RANGE VIDEO 有权
    用于高动态范围视频的交互式色调映射

    公开(公告)号：US20120237130A1

    公开(公告)日：2012-09-20

    申请号：US13395887

    申请日：2010-09-14

    申请人： Zhe Wang ,  Jiefu Zhai ,  Joan Llach

    发明人： Zhe Wang ,  Jiefu Zhai ,  Joan Llach

    IPC分类号： G06K9/64 ,  G06K9/36

    CPC分类号： G06T5/009 ,  G06T2207/10016 ,  G06T2207/20092 ,  G06T2207/20208

    摘要： A user interactive video tone mapping method is provided that can be used for the tone reproduction of high dynamic range (HDR) content on low dynamic range (LDR) displays. The method comprises the steps of selecting a frame of a video sequence; providing a user interface for a user to manually apply scribble marks to the frame; manually applying N scribble marks to the frame, N being a whole number of value 1 or in greater; and tone mapping the video sequence responsive to the scribble marks.

    摘要翻译： 提供了可用于低动态范围（LDR）显示器上的高动态范围（HDR）内容的色调再现的用户交互式视频色调映射方法。 该方法包括以下步骤：选择视频序列的帧; 提供用户界面以便用户手动地将涂鸦标记应用于所述框架; 手动将N个涂抹标记应用到框架中，N为值1或更大的整数; 并且响应于涂鸦标记对视频序列进行色调映射。

    Automatic exposure estimation for HDR images based on image statistics
    4.
    发明申请
    Automatic exposure estimation for HDR images based on image statistics 有权
    基于图像统计的HDR图像自动曝光估算

    公开(公告)号：US20100329554A1

    公开(公告)日：2010-12-30

    申请号：US12803370

    申请日：2010-06-25

    申请人： Jiefu Zhai ,  Joan Llach ,  Zhe Wang

    发明人： Jiefu Zhai ,  Joan Llach ,  Zhe Wang

    IPC分类号： G06K9/36 ,  G06K9/00

    CPC分类号： H04N5/202 ,  G09G3/2003 ,  G09G2340/0428 ,  G09G2340/06

    摘要： A method for tone mapping high dynamic range images for display on low dynamic range displays wherein high dynamic range images are first accessed. The high dynamic range images are divided the into different regions such that each region is represented by a matrix, where each element of the matrix is a weight or probability of a pixel value. An exposure of each region is determined or calculated by estimating an anchor point in each region such that most pixels in each region are mapped to mid grey and the anchor points are adjusted to a key of the images to preserve overall brightness. The regions are then placed or mapped to zones and exposure values are applied to the regions responsive to the weight or probability. The regions are fused together to obtain a final tone mapped image.

    摘要翻译： 一种用于将高动态范围图像进行色调映射以在低动态范围显示器上显示的方法，其中首先访问高动态范围图像。 高动态范围图像被划分成不同的区域，使得每个区域由矩阵表示，其中矩阵的每个元素是像素值的权重或概率。 通过估计每个区域中的锚点来确定或计算每个区域的曝光，使得每个区域中的大多数像素被映射到中间灰色，并且将锚点调整为图像的关键以保持整体亮度。 然后将区域放置或映射到区域，并且响应于重量或概率将曝光值应用于区域。 将这些区域融合在一起以获得最终的色调映射图像。

    Automatic exposure estimation for HDR images based on image statistics
    6.
    发明授权
    Automatic exposure estimation for HDR images based on image statistics 有权
    基于图像统计的HDR图像自动曝光估算

    公开(公告)号：US08345975B2

    公开(公告)日：2013-01-01

    申请号：US12803371

    申请日：2010-06-25

    申请人： Zhe Wang ,  Jiefu Zhai ,  Joan Llach

    发明人： Zhe Wang ,  Jiefu Zhai ,  Joan Llach

    IPC分类号： G06K9/34

    CPC分类号： G06K9/6223 ,  G06K9/6226 ,  G06T5/009 ,  G06T5/40 ,  G06T2207/20208 ,  H04N1/40062 ,  H04N1/4074

    摘要： A method of segmenting regions of an image wherein a number of partitions are determined based on a range of an image histogram in a logarithmic luminance domain. Regions are defined by the partitions. A mean value of each region is calculated by K-means clustering wherein the clustering is initialized, data is assigned and centroids are updated. Anchor points are determined based on the centroids and a weight of each pixel is computed based on the anchor points.

    摘要翻译： 一种分割图像区域的方法，其中基于对数亮度域中的图像直方图的范围来确定多个分区。 区域由分区定义。 通过K-means聚类计算每个区域的平均值，其中初始化聚类，分配数据并更新质心。 根据重心确定锚点，并根据锚点计算每个像素的重量。

    Automatic exposure estimation for HDR images based on image statistics
    7.
    发明申请
    Automatic exposure estimation for HDR images based on image statistics 有权
    基于图像统计的HDR图像自动曝光估算

    公开(公告)号：US20100329557A1

    公开(公告)日：2010-12-30

    申请号：US12803371

    申请日：2010-06-25

    申请人： Zhe Wang ,  Jiefu Zhai ,  Joan Llach

    发明人： Zhe Wang ,  Jiefu Zhai ,  Joan Llach

    IPC分类号： G06K9/34

    CPC分类号： G06K9/6223 ,  G06K9/6226 ,  G06T5/009 ,  G06T5/40 ,  G06T2207/20208 ,  H04N1/40062 ,  H04N1/4074

    摘要： A method of segmenting regions of an image wherein a number of partitions are determined based on a range of an image histogram in a logarithmic luminance domain. Regions are defined by the partitions. A mean value of each region is calculated by K-means clustering wherein the clustering is initialized, data is assigned and centroids are updated. Anchor points are determined based on the centroids and a weight of each pixel is computed based on the anchor points.

    摘要翻译： 一种分割图像区域的方法，其中基于对数亮度域中的图像直方图的范围来确定多个分区。 区域由分区定义。 通过K-means聚类计算每个区域的平均值，其中初始化聚类，分配数据并更新质心。 根据重心确定锚点，并根据锚点计算每个像素的重量。

    Interactive tone mapping for high dynamic range video
    8.
    发明授权
    Interactive tone mapping for high dynamic range video 有权
    高动态范围视频的互动色调映射

    公开(公告)号：US09336578B2

    公开(公告)日：2016-05-10

    申请号：US13395887

    申请日：2010-09-14

    申请人： Zhe Wang ,  Jiefu Zhai ,  Joan Llach

    发明人： Zhe Wang ,  Jiefu Zhai ,  Joan Llach

    IPC分类号： G06T5/00

    CPC分类号： G06T5/009 ,  G06T2207/10016 ,  G06T2207/20092 ,  G06T2207/20208

    摘要： A user interactive video tone mapping method is provided that can be used for the tone reproduction of high dynamic range (HDR) content on low dynamic range (LDR) displays. The method comprises the steps of selecting a frame of a video sequence; providing a user interface for a user to manually apply scribble marks to the frame; manually applying N scribble marks to the frame, N being a whole number of value 1 or greater; and tone mapping the video sequence responsive to the scribble marks.

    摘要翻译： 提供了可用于低动态范围（LDR）显示器上的高动态范围（HDR）内容的色调再现的用户交互式视频色调映射方法。 该方法包括以下步骤：选择视频序列的帧; 提供用户界面以便用户手动地将涂鸦标记应用于所述框架; 手动将N个涂抹标记施加到框架上，N为1或更大的整数; 并且响应于涂鸦标记对视频序列进行色调映射。

    Zone-based tone mapping
    9.
    发明授权
    Zone-based tone mapping 有权
    基于区域的色调映射

    公开(公告)号：US09087382B2

    公开(公告)日：2015-07-21

    申请号：US13381224

    申请日：2010-06-29

    申请人： Jiefu Zhai ,  Joan Llach

    发明人： Jiefu Zhai ,  Joan Llach

    IPC分类号： G09G5/02 ,  G06T5/00

    CPC分类号： G06T5/008 ,  G06T2207/10024 ,  G06T2207/20012 ,  G06T2207/20208

    摘要： A method of tone mapping high dynamic range images for display on low dynamic range displays wherein a high dynamic range image is first accessed. The high dynamic range image is segmented into different regions such that each region is represented by a matrix, where each element of the matrix is a weight or probability of a pixel. An exposure of each region is determined or calculated and the exposure values are applied to the regions responsive to the weight or probability. The different regions are then fused together to obtain a final tone mapped image.

    摘要翻译： 一种色调映射高动态范围图像的方法，用于在低动态范围显示器上显示，其中首先访问高动态范围图像。 高动态范围图像被分割成不同的区域，使得每个区域由矩阵表示，其中矩阵的每个元素是像素的权重或概率。 确定或计算每个区域的曝光，并且将曝光值应用于响应于重量或概率的区域。 然后将不同的区域融合在一起以获得最终的色调映射图像。

    SIGNAL GENERATION FOR LED/LCD-BASED HIGH DYNAMIC RANGE DISPLAYS
    10.
    发明申请
    SIGNAL GENERATION FOR LED/LCD-BASED HIGH DYNAMIC RANGE DISPLAYS 审中-公开
    用于基于LED / LCD的高动态范围显示器的信号生成

    公开(公告)号：US20120056906A1

    公开(公告)日：2012-03-08

    申请号：US13148819

    申请日：2010-02-09

    申请人： Jiefu Zhai ,  Joan Llach

    发明人： Jiefu Zhai ,  Joan Llach

    IPC分类号： G09G5/10

    CPC分类号： G09G3/3426 ,  G09G2320/0646 ,  G09G2360/16

    摘要： A method of operating a high dynamic range display device comprises the steps of: accessing an image signal; generating an intermediate backlighting driver signal for individual backlight elements for a backlighting unit responsive to the image signal; convoluting the intermediate backlighting driver signals with a point spread function of the backlighting unit; deriving at least one new backlighting driver signal responsive to the convoluting step; determining display error associated with a plurality of available light shutter signals of a front-end unit having individual light shutters and associated with the at least one new backlighting driver signal, the front-end unit having a higher resolution than the backlighting unit; driving the display device with a combination of shutter signals and new backlighting driver signals that causes a reduction in the display error with respect to other generated intermediate backlighting driver signals and other available light shutter signals.

    摘要翻译： 操作高动态范围显示装置的方法包括以下步骤：访问图像信号; 针对所述图像信号产生用于背光单元的各个背光元件的中间背光驱动器信号; 用背光单元的点扩散函数对中间背光驱动器信号进行卷积; 响应于所述卷积步骤导出至少一个新的背光驱动器信号; 确定与具有各个光闸的前端单元的多个可用光快门信号相关联的显示误差，并与所述至少一个新的背光驱动器信号相关联，所述前端单元具有比所述背光单元更高的分辨率; 通过组合快门信号和新的背光驱动器信号来驱动显示设备，这导致相对于其他产生的中间背光驱动器信号和其它可用光快门信号的显示误差的降低。