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    • 1. 发明申请
    • HANDLING MULTIPLE HDR IMAGE SOURCES
    • 处理多个HDR图像源
    • WO2017089146A1
    • 2017-06-01
    • PCT/EP2016/077373
    • 2016-11-11
    • KONINKLIJKE PHILIPS N.V.
    • MERTENS, Mark Jozef Willem
    • H04N1/60G06T5/00H04N5/57G09G5/02H04N5/265H04N5/445
    • H04N1/6027G06T5/007G06T5/50G06T2207/20208G06T2207/20221G09G5/026H04N5/20H04N5/265H04N5/445H04N5/45H04N5/57H04N9/68H04N9/77
    • To allow the needed versatile image or video combination now that HDR videos of considerably different luminance characteristics are appearing, the apparatus (301) for combining two images or two videos of images (Im_HDR, Im_LDR), one of them being a high dynamic range image or video, the apparatus comprising: - a dynamic range establishing unit (302) arranged to establish a combination luminance dynamic range (CombRng), being characterized by at least a maximum luminance (LMC) which is determined based on at least one of: a maximum luminance of at least one of the two images or the two videos of images, and a peak brightness of a display for rendering the two images or the two videos of images, the dynamic range establishing unit further comprising a luminance anchor determining unit (303), arranged to determine an anchor luminance (anc) in the combination luminance dynamic range (CombRng), - a color transformation unit (310), arranged to perform at least a luminance transformation on at least one of the two images or videos, wherein the colortransformation unit (310) comprises a source anchor luminance reading unit (311) arranged to read at least one source anchor luminance (L_SA1) from a first source (350) which delivers a first image or video (Im1_LDR) of the two images or videos, and wherein the color transformation unit is arranged to establish a color transformation (FF_1) to be applied to the first image or video, which color transformation isdependenton the value of the source anchor luminance (L_SA1) by having the property that the source anchor luminance (L_SA1) is mapped to an output luminance in a vicinity of the anchor luminance (anc); and - an image combination unit (320) arranged to combine the two images or two videos of images to form at least one output image (Im_o).
    • 为了允许所需的通用图像或视频组合,现在出现具有明显不同的亮度特性的HDR视频,用于组合两个图像或两个图像视频(Im_HDR,Im_LDR)的设备(301),一个 所述装置包括: - 动态范围建立单元(302),其被布置为建立组合亮度动态范围(CombRng),其特征在于至少确定最大亮度(LMC),所述最大亮度(LMC)被确定 基于以下中的至少一个:所述两个图像中的至少一个或所述图像的两个视频的最大亮度,以及用于渲染所述两个图像或所述图像的两个视频的显示器的峰值亮度,所述动态范围建立单元进一步 包括亮度锚定确定单元(303),被布置为确定所述组合亮度动态范围(CombRng)中的锚点亮度(anc), - 颜色变换单元(310),被布置为执行至少亮度tra 其中,所述颜色变换单元(310)包括源锚定亮度读取单元(311),所述源锚点亮度读取单元(311)被配置为从第一源(350)读取至少一个源锚定亮度(L_SA1) 两个图像或视频的第一图像或视频(Im1_LDR),并且其中,颜色变换单元被布置为建立要应用于第一图像或视频的颜色变换(FF_1),该颜色变换取决于源的值 锚点亮度(L_SA1)通过具有锚点亮度(L_SA1)被映射到锚点亮度(anc)附近的输出亮度的特性来确定锚点亮度(L_SA1); 以及 - 图像组合单元(320),被配置为组合图像的两个图像或两个视频以形成至少一个输出图像(Im_o)。
    • 6. 发明申请
    • DISPLAY MANAGEMENT FOR HIGH DYNAMIC RANGE VIDEO
    • 高动态范围视频的显示管理
    • WO2014130343A3
    • 2014-10-16
    • PCT/US2014016304
    • 2014-02-13
    • DOLBY LAB LICENSING CORP
    • ATKINS ROBINKUNKEL TIMOBEIER THADDEUSCHEN TAO
    • H04N9/67G06T5/00H04N5/20H04N9/68H04N19/46
    • G09G3/2003G06T5/007G06T5/20G06T7/13G06T2207/10024G06T2207/20016G06T2207/20208G09G2340/06H04N5/20H04N9/67H04N9/68
    • A display management processor receives an input image with enhanced dynamic range to be displayed on a target display which has a different dynamic range than a reference display. The input image is first transformed into a perceptually-corrected IPT color space. A non-linear mapping function generates a first tone-mapped signal by mapping the intensity of the input signal from the reference dynamic range into the target dynamic range. The intensity (I) component of the first tone-mapped signal is sharpened to preserve details, and the saturation of the color (P and T) components is adjusted to generate a second tone-mapped output image. A color gamut mapping function is applied to the second tone-mapped output image to generate an image suitable for display onto the target display. The display management pipeline may also be adapted to adjust the intensity and color components of the displayed image according to specially defined display modes.
    • 显示管理处理器接收具有增强动态范围的输入图像以显示在具有与参考显示器不同的动态范围的目标显示器上。 首先将输入图像转换成感知校正的IPT色彩空间。 非线性映射函数通过将输入信号的强度从参考动态范围映射到目标动态范围来生成第一色调映射信号。 第一色调映射信号的强度(I)分量被锐化以保存细节,并且调整色彩(P和T)分量的饱和度以生成第二色调映射输出图像。 将色域映射函数应用于第二色调映射输出图像以生成适合于显示在目标显示器上的图像。 显示管理流水线也可以适用于根据特定的显示模式调整显示图像的强度和颜色分量。
    • 7. 发明申请
    • DISPLAY MANAGEMENT FOR IMAGES WITH ENHANCED DYNAMIC RANGE
    • 具有增强动态范围的图像显示管理
    • WO2014043005A1
    • 2014-03-20
    • PCT/US2013/058683
    • 2013-09-09
    • DOLBY LABORATORIES LICENSING CORPORATION
    • ATKINS, Robin
    • H04N5/20G06T5/00
    • G06T5/009G06T5/10G06T2207/10024G06T2207/20012G06T2207/20016G06T2207/20052G06T2207/20056G06T2207/20208H04N5/20
    • An image processor receives an input image with enhanced dynamic range to be displayed on a target display which has a different dynamic range than a reference display. After optional color transformation (110) and perceptual quantization (115) of the input image, a multiscale mapping process (120) combines linear (125) and non-linear (130) mapping functions to its input to generate first (127) and second (132) output images, wherein the first and second output images may have a different dynamic range than the first image. A frequency transform (135, 140), such as the FFT, is applied to the first and second output images to generate first (137) and second (142) transformed images. An interpolation function (145) is applied to the first and second transformed images to generate an interpolated transformed image (147). An inverse transform function (150) is applied to the interpolated transformed image to generate an output tone-mapped image (152). The output tone-mapped image is post-processed to be displayed on the target display.
    • 图像处理器接收具有增强的动态范围的输入图像以显示在具有与参考显示不同的动态范围的目标显示器上。 在输入图像的可选颜色变换(110)和感知量化(115)之后,多尺度映射处理(120)将线性(125)和非线性(130)映射函数组合到其输入端以产生第一(127)和第二 (132)输出图像,其中所述第一和第二输出图像可以具有与所述第一图像不同的动态范围。 诸如FFT的频率变换(135,140)被施加到第一和第二输出图像以生成第一(137)和第二(142)变换图像。 内插函数(145)被应用于第一和第二变换图像以生成内插变换图像(147)。 将逆变换函数(150)应用于内插变换图像以生成输出色调映射图像(152)。 输出色调映射图像被后处理以显示在目标显示器上。
    • 9. 发明申请
    • A METHOD OF DIGITAL SIGNAL PROCESSING
    • 数字信号处理方法
    • WO2011058353A1
    • 2011-05-19
    • PCT/GB2010/051873
    • 2010-11-10
    • VIDCHECK LIMITEDDOVE, Thomas
    • DOVE, Thomas
    • H04N9/64H04N5/20
    • H04N5/20H04N9/64
    • A method of digitally processing images and/or audio in the form of a plurality of data samples, each data sample having a value representative of a visual or audio property, the method comprising: identifying a first set of data samples having values outside a first predefined range of data values; identifying a second set of data samples having values outside a second predefined range of data values, the second predefined range being within the first predefined range; and applying a non-linear scaling algorithm to the data values of the first and second sets of data samples to generate a set of modified data samples having data values within the first predefined range.
    • 以多个数据样本的形式数字处理图像和/或音频的方法,每个数据采样具有表示视觉或音频属性的值,所述方法包括:识别具有第一 预定义的数据值范围; 识别具有在第二预定义数据值范围之外的值的第二组数据样本,所述第二预定义范围在所述第一预定范围内; 以及对所述第一和第二组数据样本的数据值应用非线性缩放算法,以生成具有在所述第一预定范围内的数据值的一组经修改的数据样本。