Merging multiple exposures to generate a high dynamic range image

    公开(公告)号:US10825426B2

    公开(公告)日:2020-11-03

    申请号:US16273896

    申请日:2019-02-12

    Abstract: A method of generating a high dynamic range (HDR) image is provided that includes capturing a long exposure image and a short exposure image of a scene, computing a merging weight for each pixel location of the long exposure image based on a pixel value of the pixel location and a saturation threshold, and computing a pixel value for each pixel location of the HDR image as a weighted sum of corresponding pixel values in the long exposure image and the short exposure image, wherein a weight applied to a pixel value of the pixel location of the short exposure image and a weight applied to a pixel value of the pixel location in the pixel long exposure image are determined based on the merging weight computed for the pixel location and responsive to motion in a scene of the long exposure image and the short exposure image.

    Illumination estimation using natural scene statistics
    2.
    发明授权
    Illumination estimation using natural scene statistics 有权
    使用自然景观统计的照明估计

    公开(公告)号:US09519839B2

    公开(公告)日:2016-12-13

    申请号:US14188670

    申请日:2014-02-24

    Abstract: A method for estimating illumination of an image captured by a digital system is provided that includes computing a feature vector for the image, identifying at least one best reference illumination class for the image from a plurality of predetermined reference illumination classes using the feature vector, an illumination classifier, and predetermined classification parameters corresponding to each reference illumination class, and computing information for further processing of the image based on the at least one best reference illumination class, wherein the information is at least one selected from a group consisting of color temperature and white balance gains.

    Abstract translation: 提供了一种用于估计由数字系统拍摄的图像的照明的方法,其包括计算图像的特征向量,使用特征向量从多个预定参考照明类别中识别图像的至少一个最佳参考照明类别, 照明分类器和对应于每个参考照明类别的预定分类参数,以及用于基于所述至少一个最佳参考照明类别进一步处理所述图像的计算信息,其中所述信息是从由色温和 白平衡收益。

    Method and apparatus for a surround view camera system photometric alignment
    3.
    发明授权
    Method and apparatus for a surround view camera system photometric alignment 有权
    用于环绕立体照相机系统光度校准的方法和装置

    公开(公告)号:US09509909B2

    公开(公告)日:2016-11-29

    申请号:US14546929

    申请日:2014-11-18

    CPC classification number: H04N5/23238 G06T3/4038 H04N9/045 H04N9/68

    Abstract: A method, apparatus and a surround view camera system. The method includes extracting block samples from at least one of a composite view geometric LUT, input fish-eye image and view overlapping region, selecting sample inliers from the extracted block samples, estimating optimal color gain for the selected block samples, performing refined adjustment based on the estimated color gain and applying color transform, and producing a composite surround view image.

    Abstract translation: 一种方法,装置和环绕立体照相机系统。 该方法包括从复合视图几何LUT,输入鱼眼图像和视图重叠区域中的至少一个提取块样本,从提取的块样本中选择样本内容,估计所选块样本的最佳色彩增益,基于精确调整 关于估计的颜色增益和应用颜色变换,并且产生复合环绕视图图像。

    Local tone mapping for high dynamic range images
    4.
    发明授权
    Local tone mapping for high dynamic range images 有权
    用于高动态范围图像的本地色调映射

    公开(公告)号:US09437171B2

    公开(公告)日:2016-09-06

    申请号:US14098243

    申请日:2013-12-05

    Abstract: A method of local tone mapping of a high dynamic range (HDR) image is provided that includes dividing a luminance image of the HDR image into overlapping blocks and computing a local tone curve for each block, computing a tone mapped value for each pixel of the luminance image as a weighted sum of values computed by applying local tone curves of neighboring blocks to the pixel value, computing a gain for each pixel as a ratio of the tone mapped value to the value of the pixel, and applying the gains to corresponding pixels in the HDR image. A weight for each value is computed based on distance from the pixel to the center point of the block having the local tone curve applied to compute the value and the intensity difference between the value of the pixel and the block mean pixel value.

    Abstract translation: 提供了一种高动态范围(HDR)图像的本地色调映射的方法,其包括将HDR图像的亮度图像划分为重叠块并计算每个块的局部色调曲线,计算每个块的每个像素的色调映射值 亮度图像作为通过将相邻块的局部色调曲线应用于像素值而计算的值的加权和,将每个像素的增益计算为色调映射值与像素的值的比率,以及将增益应用于对应像素 在HDR图像中。 基于应用了本地色调曲线的块的像素到中心点的距离来计算每个值的权重,以计算像素的值和块平均像素值之间的值和强度差。

    Method and apparatus for fusing images from an array of cameras
    5.
    发明授权
    Method and apparatus for fusing images from an array of cameras 有权
    用于从摄像机阵列融合图像的方法和装置

    公开(公告)号:US09432576B2

    公开(公告)日:2016-08-30

    申请号:US14449964

    申请日:2014-08-01

    CPC classification number: H04N5/23232 G06T3/4053 H04N3/1593 H04N5/3415

    Abstract: An image fusing method, apparatus and system for fusing images from an array of cameras, method includes selecting a camera from the array of cameras as a reference camera, estimating misalignment between the retrieved input images from the reference camera and the retrieved input images from the other cameras, estimating misalignment parameters between the reference camera and the other cameras, estimating local disparity between the reference camera image data and the other cameras based on the estimated misalignment parameters, using the estimated misalignment parameters and the estimated disparity values, mapping the image data into a reference camera grid, the retrieved input image data from the other cameras in the array of cameras is fused in the reference camera grid utilizing fractional offsets from integer coordinates, and producing an output image grid on the reference camera grid and interpolate output pixels using processed data for producing a high resolution image.

    Abstract translation: 一种用于对来自摄像机阵列进行融合的图像的图像融合方法,装置和系统,包括从相机阵列中选择相机作为参考相机,估计来自参考相机的检索到的输入图像与来自所述参考相机的检索到的输入图像之间的对准 估计参考摄像机和其他摄像机之间的不对准参数,使用估计的未对准参数和估计的视差值,基于估计的未对准参数估计参考摄像机图像数据与其他摄像机之间的局部差异,映射图像数据 将相机阵列中其他摄像机的检索到的输入图像数据融合到参考摄像机网格中,利用来自整数坐标的分数偏移量,并在参考摄像机网格上产生输出图像网格,并使用 用于产生高分辨率图像的处理数据。

    Viewer Attention Controlled Video Playback
    6.
    发明申请
    Viewer Attention Controlled Video Playback 审中-公开
    观众注意控制视频播放

    公开(公告)号:US20150036999A1

    公开(公告)日:2015-02-05

    申请号:US13954928

    申请日:2013-07-30

    Abstract: A method of viewer attention controlled video playback on a video display device is provided that includes displaying a video on a display included in the video display device, determining whether or not attention of a viewer watching the video is focused on the display, and halting the displaying of the video when the attention of the viewer is not focused on the display.

    Abstract translation: 提供了一种在视频显示设备上观看者注意控制的视频播放的方法,包括在视频显示设备中包括的显示器上显示视频,确定观看视频的观看者的关注是否聚焦在显示器上,并且停止 当观众的注意力不集中在显示器上时,显示视频。

    MERGING MULTIPLE EXPOSURES TO GENERATE A HIGH DYNAMIC RANGE IMAGE

    公开(公告)号:US20210012755A1

    公开(公告)日:2021-01-14

    申请号:US17035250

    申请日:2020-09-28

    Abstract: A method of generating a high dynamic range (HDR) image is provided that includes capturing a long exposure image and a short exposure image of a scene, computing a merging weight for each pixel location of the long exposure image based on a pixel value of the pixel location and a saturation threshold, and computing a pixel value for each pixel location of the HDR image as a weighted sum of corresponding pixel values in the long exposure image and the short exposure image, wherein a weight applied to a pixel value of the pixel location of the short exposure image and a weight applied to a pixel value of the pixel location in the pixel long exposure image are determined based on the merging weight computed for the pixel location and responsive to motion in a scene of the long exposure image and the short exposure image.

    METHOD AND APPARATUS FOR A SURROUND VIEW CAMERA SYSTEM PHOTOMETRIC ALIGNMENT
    10.
    发明申请
    METHOD AND APPARATUS FOR A SURROUND VIEW CAMERA SYSTEM PHOTOMETRIC ALIGNMENT 有权
    用于环视图相机系统光学对准的方法和装置

    公开(公告)号:US20150138312A1

    公开(公告)日:2015-05-21

    申请号:US14546929

    申请日:2014-11-18

    CPC classification number: H04N5/23238 G06T3/4038 H04N9/045 H04N9/68

    Abstract: A method, apparatus and a surround view camera system. The method includes extracting block samples from at least one of a composite view geometric LUT, input fish-eye image and view overlapping region, selecting sample inliers from the extracted block samples, estimating optimal color gain for the selected block samples, performing refined adjustment based on the estimated color gain and applying color transform, and producing a composite surround view image.

    Abstract translation: 一种方法,装置和环绕立体照相机系统。 该方法包括从复合视图几何LUT,输入鱼眼图像和视图重叠区域中的至少一个提取块样本,从提取的块样本中选择样本内容,估计所选块样本的最佳色彩增益,基于精确调整 关于估计的颜色增益和应用颜色变换,并且产生复合环绕视图图像。

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