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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。

    SYSTEM AND METHOD FOR TRINOCULAR DEPTH ACQUISITION WITH TRIANGULAR SENSOR
    9.
    发明申请
    SYSTEM AND METHOD FOR TRINOCULAR DEPTH ACQUISITION WITH TRIANGULAR SENSOR 审中-公开
    用三角波传感器进行三角波深度采集的系统和方法

    公开(公告)号：US20130258067A1

    公开(公告)日：2013-10-03

    申请号：US13991636

    申请日：2010-12-08

    申请人： Dong-Qing Zhang ,  Jiefu Zhai ,  Zhe Wang

    发明人： Dong-Qing Zhang ,  Jiefu Zhai ,  Zhe Wang

    IPC分类号： H04N13/02

    CPC分类号： H04N13/25 ,  G06T7/55 ,  G06T2207/20088 ,  H04N13/243

    摘要： A depth acquisition system utilizes at least three sensors with at least one sensor in a non-colinear configuration to increase depth information. This configuration provides both vertical and horizontal depth information to be combined to enhance image quality, especially in three-dimensional image gathering. Vertical sensor pairs aid in determining disparities for horizontal edges and make depth estimations for horizontal edges more accurate.

    摘要翻译： 深度采集系统利用至少三个具有非共线配置中的至少一个传感器的传感器来增加深度信息。 该配置提供要组合的垂直和水平深度信息以增强图像质量，特别是在三维图像采集中。 垂直传感器对有助于确定水平边缘的差异，并使水平边缘的深度估计更准确。

    Parameters interpolation for high dynamic range video tone mapping
    10.
    发明授权
    Parameters interpolation for high dynamic range video tone mapping 有权
    高动态范围视频色调映射的参数插值

    公开(公告)号：US08737738B2

    公开(公告)日：2014-05-27

    申请号：US13579401

    申请日：2011-02-11

    申请人： Zhe Wang ,  Jiefu Zhai

    发明人： Zhe Wang ,  Jiefu Zhai

    IPC分类号： G06K9/00

    CPC分类号： G06T5/009 ,  G06T7/11 ,  G06T2207/10016 ,  G06T2207/20208

    摘要： A method for toning mapping high dynamic range (HDR) video for display in low dynamic range display comprises accessing the HDR video; producing a luminance information for the individual frames; partitioning different consecutive groups of frames into segments responsive to the luminance information; classifying the segments into static luminance segments and transient luminance segments; producing a tone mapping parameter set for the static luminance segments; producing a tone mapping parameter set for at least one of the transient luminance segments responsive to the tone mapping parameter set of an adjacent static luminance segment; and tone mapping the static luminance segments and transient luminance segments according to the respective tone mapping parameter sets.

    摘要翻译： 用于色调映射高动态范围（HDR）视频以在低动态范围显示中显示的方法包括访问HDR视频; 产生各个帧的亮度信息; 响应于亮度信息将不同连续的帧组划分成段; 将段分为静态亮度段和瞬态亮度段; 产生用于静态亮度段的色调映射参数集; 响应于相邻静态亮度段的色调映射参数集，产生针对所述瞬态亮度段中的至少一个的色调映射参数集; 以及根据各个色调映射参数组对静态亮度段和瞬态亮度段进行色调映射。