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公开(公告)号：US09077910B2
公开(公告)日：2015-07-07
申请号：US13440902
申请日：2012-04-05
申请人： Ajit Ninan , Gregory John Ward , Qifan Huang
发明人： Ajit Ninan , Gregory John Ward , Qifan Huang
CPC分类号： H04N5/23245 , G06K9/4652 , H04N5/222 , H04N5/2353 , H04N5/2355 , H04N5/265 , H04N5/3456 , H04N9/045
摘要： Techniques are described to combine image data from multiple images with different exposures into a relatively high dynamic range image. A first image of a scene may be generated with a first operational mode of an image processing system. A second image of the scene may be generated with a second different operational mode of the image processing system. The first image may be of a first spatial resolution, while the second image may be of a second spatial resolution. For example, the first spatial resolution may be higher than the second spatial resolution. The first image and the second image may be combined into an output image of the scene. The output image may be of a higher dynamic range than either of the first image and the second image and may be of a spatial resolution higher than the second spatial resolution.
摘要翻译： 描述技术来将来自多个图像的图像数据与不同曝光组合成相对高的动态范围图像。 可以利用图像处理系统的第一操作模式来生成场景的第一图像。 可以利用图像处理系统的第二不同操作模式来生成场景的第二图像。 第一图像可以是第一空间分辨率，而第二图像可以是第二空间分辨率。 例如，第一空间分辨率可以高于第二空间分辨率。 第一图像和第二图像可以被组合成场景的输出图像。 输出图像可以具有比第一图像和第二图像中的任一个更高的动态范围，并且可以具有高于第二空间分辨率的空间分辨率。
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公开(公告)号：US20120257079A1
公开(公告)日：2012-10-11
申请号：US13440902
申请日：2012-04-05
申请人： Ajit Ninan , Gregory John Ward , Qifan Huang
发明人： Ajit Ninan , Gregory John Ward , Qifan Huang
CPC分类号： H04N5/23245 , G06K9/4652 , H04N5/222 , H04N5/2353 , H04N5/2355 , H04N5/265 , H04N5/3456 , H04N9/045
摘要： Techniques are described to combine image data from multiple images with different exposures into a relatively high dynamic range image. A first image of a scene may be generated with a first operational mode of an image processing system. A second image of the scene may be generated with a second different operational mode of the image processing system. The first image may be of a first spatial resolution, while the second image may be of a second spatial resolution. For example, the first spatial resolution may be higher than the second spatial resolution. The first image and the second image may be combined into an output image of the scene. The output image may be of a higher dynamic range than either of the first image and the second image and may be of a spatial resolution higher than the second spatial resolution.
摘要翻译： 描述技术来将来自多个图像的图像数据与不同曝光组合成相对高的动态范围图像。 可以利用图像处理系统的第一操作模式来生成场景的第一图像。 可以利用图像处理系统的第二不同操作模式来生成场景的第二图像。 第一图像可以是第一空间分辨率，而第二图像可以是第二空间分辨率。 例如，第一空间分辨率可以高于第二空间分辨率。 第一图像和第二图像可以被组合成场景的输出图像。 输出图像可以具有比第一图像和第二图像中的任一个更高的动态范围，并且可以具有高于第二空间分辨率的空间分辨率。
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公开(公告)号：US20120162366A1
公开(公告)日：2012-06-28
申请号：US13326273
申请日：2011-12-14
申请人： Ajit Ninan , Scott Daly , Gregory John Ward , Robin Atkins
发明人： Ajit Ninan , Scott Daly , Gregory John Ward , Robin Atkins
IPC分类号： H04N13/02
CPC分类号： H04N5/2355 , H04N5/23232 , H04N5/2353 , H04N5/35536 , H04N13/106 , H04N13/139 , H04N13/239 , H04N13/289 , H04N2013/0088
摘要： High dynamic range 3D images are generated with relatively narrow dynamic range image sensors. Input frames of different views may be set to different exposure settings. Pixels in the input frames may be normalized to a common range of luminance levels. Disparity between normalized pixels in the input frames may be computed and interpolated. The pixels in the different input frames may be shifted to, or stay in, a common reference frame. The pre-normalized luminance levels of the pixels may be used to create high dynamic range pixels that make up one, two or more output frames of different views. Further, a modulated synopter with electronic mirrors is combined with a stereoscopic camera to capture monoscopic HDR, alternating monoscopic HDR and stereoscopic LDR images, or stereoscopic HDR images.
摘要翻译： 使用相对较窄的动态范围图像传感器生成高动态范围3D图像。 可以将不同视图的输入框设置为不同的曝光设置。 输入帧中的像素可被归一化为公共亮度级别。 可以计算和内插输入帧中的归一化像素之间的差异。 不同输入帧中的像素可以被移位到或停留在公共参考帧中。 可以使用像素的预标准化亮度水平来创建构成不同视图的一个，两个或更多个输出帧的高动态范围像素。 此外，具有电子反射镜的调制的内窥镜与立体相机组合以捕获单视野HDR，交替单视野HDR和立体LDR图像或立体HDR图像。
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公开(公告)号：US08248486B1
公开(公告)日：2012-08-21
申请号：US13449119
申请日：2012-04-17
申请人： Gregory John Ward , Wenhui Jia , Ajit Ninan , Arkady Ten , Gaven Wang
发明人： Gregory John Ward , Wenhui Jia , Ajit Ninan , Arkady Ten , Gaven Wang
CPC分类号： H04N9/77 , H04N1/4072 , H04N1/60 , H04N1/6066 , H04N9/67 , H04N19/30
摘要： Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.
摘要翻译： 提供了技术来编码和解码包括色调映射（TM）图像的图像数据，其中HDR重建数据以亮度比和颜色残余值的形式。 在一个示例实施例中，基于高动态范围（HDR）图像和包括一个或多个的图像的导数色调映射（TM）图像，在各个像素的基础上产生颜色空间的颜色通道中的亮度比值和残差值 不能从具有亮度比图像的TM图像中恢复的颜色变化。 可以将从亮度比值和颜色通道残差导出的具有HDR重建数据的TM图像输出到图像文件到下游装置，例如用于解码，渲染和/或存储。 图像文件可以被解码以生成没有颜色变化的恢复的HDR图像。
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公开(公告)号：US20120281009A1
公开(公告)日：2012-11-08
申请号：US13553440
申请日：2012-07-19
申请人： Gregory John Ward , Wenhui Jia , Ajit Ninan , Arkady Ten , Gaven Wang
发明人： Gregory John Ward , Wenhui Jia , Ajit Ninan , Arkady Ten , Gaven Wang
摘要： Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.
摘要翻译： 提供了技术来编码和解码包括色调映射（TM）图像的图像数据，其中HDR重建数据以亮度比和颜色残余值的形式。 在一个示例实施例中，基于高动态范围（HDR）图像和包括一个或多个的图像的导数色调映射（TM）图像，在各个像素的基础上产生颜色空间的颜色通道中的亮度比值和残差值 不能从具有亮度比图像的TM图像中恢复的颜色变化。 可以将从亮度比值和颜色通道残差导出的具有HDR重建数据的TM图像输出到图像文件到下游装置，例如用于解码，渲染和/或存储。 图像文件可以被解码以生成没有颜色变化的恢复的HDR图像。
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公开(公告)号：US09210322B2
公开(公告)日：2015-12-08
申请号：US13326273
申请日：2011-12-14
申请人： Ajit Ninan , Scott Daly , Gregory John Ward , Robin Atkins
发明人： Ajit Ninan , Scott Daly , Gregory John Ward , Robin Atkins
CPC分类号： H04N5/2355 , H04N5/23232 , H04N5/2353 , H04N5/35536 , H04N13/106 , H04N13/139 , H04N13/239 , H04N13/289 , H04N2013/0088
摘要： High dynamic range 3D images are generated with relatively narrow dynamic range image sensors. Input frames of different views may be set to different exposure settings. Pixels in the input frames may be normalized to a common range of luminance levels. Disparity between normalized pixels in the input frames may be computed and interpolated. The pixels in the different input frames may be shifted to, or stay in, a common reference frame. The pre-normalized luminance levels of the pixels may be used to create high dynamic range pixels that make up one, two or more output frames of different views. Further, a modulated synopter with electronic mirrors is combined with a stereoscopic camera to capture monoscopic HDR, alternating monoscopic HDR and stereoscopic LDR images, or stereoscopic HDR images.
摘要翻译： 使用相对较窄的动态范围图像传感器生成高动态范围3D图像。 可以将不同视图的输入框设置为不同的曝光设置。 输入帧中的像素可被归一化为公共亮度级别。 可以计算和内插输入帧中的归一化像素之间的差异。 不同输入帧中的像素可以被移位到或停留在公共参考帧中。 可以使用像素的预标准化亮度水平来创建构成不同视图的一个，两个或更多个输出帧的高动态范围像素。 此外，具有电子反射镜的调制的内窥镜与立体相机组合以捕获单视野HDR，交替单视野HDR和立体LDR图像或立体HDR图像。
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公开(公告)号：US08334911B2
公开(公告)日：2012-12-18
申请号：US13553440
申请日：2012-07-19
申请人： Wenhui Jia , Ajit Ninan , Arkady Ten , Gregory John Ward
发明人： Wenhui Jia , Ajit Ninan , Arkady Ten , Gregory John Ward
摘要： Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.
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公开(公告)号：US09299317B2
公开(公告)日：2016-03-29
申请号：US13984524
申请日：2012-03-01
申请人： Gregory John Ward
发明人： Gregory John Ward
CPC分类号： G06T5/009 , G06T5/007 , G06T5/008 , G06T5/40 , G06T5/50 , G06T2207/10016 , G06T2207/10024 , G06T2207/20016 , G06T2207/20072 , G06T2207/20208 , G06T2207/20221 , G09G5/02
摘要： In a method to generate a tone-mapped image from a high-dynamic range image (HDR), an input HDR image is converted into a logarithmic domain and a global tone-mapping operator generates a high-resolution gray scale ratio image from the input HDR image. Based at least in part on the high-resolution gray scale ratio image, at least two different gray scale ratio images are generated and are merged together to generate a local multiscale gray scale ratio image that represents a weighted combination of the at least two different gray scale ratio images, each being of a different spatial resolution level. An output tone-mapped image is generated based on the high-resolution gray scale image and the local multiscale gray scale ratio image.
摘要翻译： 在从高动态范围图像（HDR）生成色调映射图像的方法中，将输入HDR图像转换成对数域，并且全局色调映射运算符从输入端生成高分辨率灰度比图像 HDR图像。 至少部分地基于高分辨率灰度比图像，生成至少两个不同的灰度比图像并且被合并在一起以产生局部多尺度灰度比图像，其表示所述至少两个不同灰度的加权组合 比例图像，每个都具有不同的空间分辨率级别。 基于高分辨率灰度图像和局部多尺度灰度比图像生成输出色调映射图像。
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公开(公告)号：US08582913B2
公开(公告)日：2013-11-12
申请号：US13488228
申请日：2012-06-04
CPC分类号： G06T5/007 , G06T2207/20208 , G09G3/3426 , G09G5/10 , G09G2320/0646 , G09G2320/066 , H04N5/20 , H04N9/3126
摘要： Methods and apparatus according to various aspects take as input image data in a lower-dynamic-range (LDR) format and produce as output enhanced image data having a dynamic range greater than that of the input image data (i.e. higher-dynamic range (HDR) image data). In some embodiments, the methods are applied to video data and are performed in real-time (i.e. processing of video frames to enhance the dynamic range of the video frames is completed at least on average at the frame rate of the video signal).
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10.发明授权Apparatus and methods for encoding, decoding and representing high dynamic range images 有权用于编码，解码和表示高动态范围图像的装置和方法公开(公告)号：US08514934B2
公开(公告)日：2013-08-20
申请号：US11831709
申请日：2007-07-31
申请人： Gregory John Ward , Maryann Simmons
发明人： Gregory John Ward , Maryann Simmons
CPC分类号： H04N19/98 , G06T5/007 , G06T5/009 , G06T2207/10016 , G06T2207/10024 , G06T2207/20012 , G06T2207/20208 , G09G5/10 , H04N1/3871 , H04N19/126 , H04N19/182 , H04N19/184 , H04N19/186 , H04N19/30 , H04N19/463
摘要： A data structure defining a high dynamic range image comprises a tone map having a reduced dynamic range and HDR information. The high dynamic range image can be reconstructed from the tone map and the HDR information. The data structure can be backwards compatible with legacy hardware or software viewers. The data structure may comprise a JFIF file having the tone map encoded as a JPEG image with the HDR information in an application extension or comment field of the JFIF file, or a MPEG file having the tone map encoded as a MPEG image with the HDR information in a video or audio channel of the MPEG file. Apparatus and methods for encoding or decoding the data structure may apply pre- or post correction to compensate for lossy encoding of the high dynamic range information.
摘要翻译： 定义高动态范围图像的数据结构包括具有减小的动态范围和HDR信息的色调映射。 可以从色调图和HDR信息重建高动态范围图像。 数据结构可以与传统硬件或软件查看器向后兼容。 数据结构可以包括具有编码为JPEG图像的色调映射的JFIF文件，其中HDR信息在JFIF文件的应用程序扩展或注释字段中，或具有编码为具有HDR信息的MPEG图像的色调映射的MPEG文件 在MPEG文件的视频或音频通道中。 用于对数据结构进行编码或解码的装置和方法可以在校正前或之后应用以补偿高动态范围信息的有损编码。
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