公开(公告)号：US11587529B2

公开(公告)日：2023-02-21

申请号：US17208886

申请日：2021-03-22

申请人： DOLBY LABORATORIES LICENSING CORPORATION

发明人： Jon Scott Miller ,  Scott Daly ,  Mahdi Nezamabadi ,  Robin Atkins

IPC分类号： G06K9/00 ,  G09G5/10 ,  H04N19/40 ,  G06F3/14 ,  G09G5/00 ,  G09G5/06

摘要： A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.

公开(公告)号：US10701375B2

公开(公告)日：2020-06-30

申请号：US16087241

申请日：2017-03-22

申请人： Dolby Laboratories Licensing Corporation

发明人： Guan-Ming Su ,  Jon Scott Miller ,  Walter J. Husak ,  Yee Jin Lee ,  Harshad Kadu

IPC分类号： H04N19/186 ,  H04N19/176 ,  G06T5/00 ,  H04N19/80 ,  H04N19/154 ,  H04N19/117 ,  H04N19/102 ,  H04N19/187 ,  H04N19/44 ,  H04N1/60 ,  H04N19/85 ,  H04N1/64

摘要： A tone-mapping function that maps input images of a high dynamic range into reference tone-mapped images of a relatively narrow dynamic range is generated. A luma forward reshaping function is derived, based on first bit depths and second bit depths, for forward reshaping luma codewords of the input images into forward reshaped luma codewords of forward reshaped images approximating the reference tone-mapped images. A chroma forward reshaping mapping is derived for predicting chroma codewords of the forward reshaped images. Backward reshaping metadata that is to be used by recipient devices to generate a luma backward reshaping function and a chroma backward reshaping mapping is transmitted with the forward reshaped images to the recipient devices. Techniques for the joint derivation of forward luma and chroma reshaping functions are also presented.

公开(公告)号：US11600244B2

公开(公告)日：2023-03-07

申请号：US17892473

申请日：2022-08-22

申请人： Dolby Laboratories Licensing Corporation

发明人： Jon Scott Miller ,  Scott Daly ,  Mahdi Nezamabadi ,  Robin Atkins

IPC分类号： G06K9/00 ,  G09G5/10 ,  H04N19/40 ,  G06F3/14 ,  G09G5/00 ,  G09G5/06

摘要： A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.

公开(公告)号：US20190110054A1

公开(公告)日：2019-04-11

申请号：US16087241

申请日：2017-03-22

申请人： Dolby Laboratories Licensing Corporation

发明人： Guan-Ming Su ,  Jon Scott Miller ,  Walter J. Husak ,  Yee Jin Lee ,  Harshad Kadu

IPC分类号： H04N19/186 ,  H04N19/187 ,  H04N19/102 ,  H04N1/60 ,  H04N19/44

CPC分类号： H04N19/186 ,  G06T5/008 ,  H04N1/6027 ,  H04N1/6058 ,  H04N1/648 ,  H04N19/102 ,  H04N19/117 ,  H04N19/154 ,  H04N19/176 ,  H04N19/187 ,  H04N19/44 ,  H04N19/80 ,  H04N19/85 ,  H04N2201/3256

摘要： A tone-mapping function that maps input images of a high dynamic range into reference tone-mapped images of a relatively narrow dynamic range is generated. A luma forward reshaping function is derived, based on first bit depths and second bit depths, for forward reshaping luma codewords of the input images into forward reshaped luma codewords of forward reshaped images approximating the reference tone-mapped images. A chroma forward reshaping mapping is derived for predicting chroma codewords of the forward reshaped images. Backward reshaping metadata that is to be used by recipient devices to generate a luma backward reshaping function and a chroma backward reshaping mapping is transmitted with the forward reshaped images to the recipient devices. Techniques for the joint derivation of forward luma and chroma reshaping functions are also presented.

公开(公告)号：US09077994B2

公开(公告)日：2015-07-07

申请号：US14363129

申请日：2012-12-06

申请人： Dolby Laboratories Licensing Corporation

发明人： Jon Scott Miller ,  Scott Daly ,  Mahdi Nezamabadi ,  Robin Atkins

IPC分类号： G06K9/36 ,  H04N19/40 ,  G06F3/14 ,  G09G5/00

CPC分类号： G09G5/10 ,  G06F3/14 ,  G09G5/005 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2320/04 ,  G09G2340/0428 ,  G09G2340/0435 ,  G09G2340/06 ,  G09G2340/14 ,  G09G2370/04 ,  G09G2370/08 ,  G09G2380/08 ,  H04N19/40

摘要： A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.

摘要翻译： 手持成像设备具有被配置为接收参考编码图像数据的数据接收器。 数据包括由外部编码系统编码的参考码值。 参考码值表示参考灰度级，其使用基于在不同光级别对空间频率适应的人类视觉的感知非线性的参考灰度显示功能来选择。 成像设备还具有数据转换器，其被配置为访问成像设备的参考代码值和设备特定代码值之间的代码映射。 设备特定的代码值被配置为产生特定于成像设备的灰度级。 基于代码映射，数据转换器被配置为将参考编码图像数据转码为特定于设备的图像数据，其由特定于设备的代码值进行编码。

公开(公告)号：US10242650B2

公开(公告)日：2019-03-26

申请号：US15960303

申请日：2018-04-23

申请人： DOLBY LABORATORIES LICENSING CORPORATION

发明人： Jon Scott Miller ,  Scott Daly ,  Mahdi Nezamabadi ,  Robin Atkins

IPC分类号： G06K9/00 ,  G09G5/10 ,  H04N19/40 ,  G06F3/14 ,  G09G5/00

摘要： A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.

公开(公告)号：US09685139B2

公开(公告)日：2017-06-20

申请号：US15283223

申请日：2016-09-30

申请人： DOLBY LABORATORIES LICENSING CORPORATION

发明人： Jon Scott Miller ,  Scott Daly ,  Mahdi Nezamabadi ,  Robin Atkins

IPC分类号： G06K9/36 ,  G09G5/10 ,  G06F3/14 ,  G09G5/00 ,  H04N19/40

CPC分类号： G09G5/10 ,  G06F3/14 ,  G09G5/005 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2320/04 ,  G09G2340/0428 ,  G09G2340/0435 ,  G09G2340/06 ,  G09G2340/14 ,  G09G2370/04 ,  G09G2370/08 ,  G09G2380/08 ,  H04N19/40

摘要： A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.

公开(公告)号：US09521419B2

公开(公告)日：2016-12-13

申请号：US14925596

申请日：2015-10-28

申请人： DOLBY LABORATORIES LICENSING CORPORATION

发明人： Jon Scott Miller ,  Scott Daly ,  Mahdi Nezamabadi ,  Robin Atkins

IPC分类号： G06K9/46 ,  H04N19/40 ,  G06F3/14 ,  G09G5/00 ,  G09G5/10

CPC分类号： G09G5/10 ,  G06F3/14 ,  G09G5/005 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2320/04 ,  G09G2340/0428 ,  G09G2340/0435 ,  G09G2340/06 ,  G09G2340/14 ,  G09G2370/04 ,  G09G2370/08 ,  G09G2380/08 ,  H04N19/40

摘要： A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.

摘要翻译： 手持成像设备具有被配置为接收参考编码图像数据的数据接收器。 数据包括由外部编码系统编码的参考码值。 参考码值表示参考灰度级，其使用基于在不同光级别对空间频率适应的人类视觉的感知非线性的参考灰度显示功能来选择。 成像设备还具有数据转换器，其被配置为访问成像设备的参考代码值和设备特定代码值之间的代码映射。 设备特定的代码值被配置为产生特定于成像设备的灰度级。 基于代码映射，数据转换器被配置为将参考编码图像数据转码为特定于设备的图像数据，其被编码为特定于设备的代码值。

公开(公告)号：US09288499B2

公开(公告)日：2016-03-15

申请号：US14735875

申请日：2015-06-10

申请人： DOLBY LABORATORIES LICENSING CORPORATION

发明人： Jon Scott Miller ,  Scott Daly ,  Mahdi Nezamabadi ,  Robin Atkins

IPC分类号： G06K9/36 ,  H04N19/40 ,  G06F3/14 ,  G09G5/00

CPC分类号： G09G5/10 ,  G06F3/14 ,  G09G5/005 ,  G09G2320/0276 ,  G09G2320/0285 ,  G09G2320/04 ,  G09G2340/0428 ,  G09G2340/0435 ,  G09G2340/06 ,  G09G2340/14 ,  G09G2370/04 ,  G09G2370/08 ,  G09G2380/08 ,  H04N19/40

摘要： A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.

摘要翻译： 手持成像设备具有被配置为接收参考编码图像数据的数据接收器。 数据包括由外部编码系统编码的参考码值。 参考码值表示参考灰度级，其使用基于在不同光级别对空间频率适应的人类视觉的感知非线性的参考灰度显示功能来选择。 成像设备还具有数据转换器，其被配置为访问成像设备的参考代码值和设备特定代码值之间的代码映射。 设备特定的代码值被配置为产生特定于成像设备的灰度级。 基于代码映射，数据转换器被配置为将参考编码图像数据转码为特定于设备的图像数据，其被编码为特定于设备的代码值。

公开(公告)号：US10419762B2

公开(公告)日：2019-09-17

申请号：US15555047

申请日：2016-03-01

申请人： Dolby Laboratories Licensing Corporation ,  DOLBY INTERNATIONAL AB

发明人： Jan Froehlich ,  Guan-Ming Su ,  Robin Atkins ,  Scott Daly ,  Jon Scott Miller

IPC分类号： H04N19/124 ,  H04N19/136 ,  H04N19/98 ,  H04N19/117 ,  H04N19/132 ,  H04N19/156 ,  H04N19/182 ,  H04N19/154

摘要： A content-adaptive quantizer processor receives an input image with an input bit depth. A noise-mask generation process is applied to the input image to generate a noise mask image which characterizes each pixel in the input image in terms of its perceptual relevance in masking quantization noise. A noise mask histogram is generated based on the input image and the noise mask image. A masking-noise level to bit-depth function is applied to the noise mask histogram to generate minimal bit depth values for each bin in the noise mask histogram. A codeword mapping function is generated based on the input bit depth, a target bit depth, and the minimal bit depth values. The codeword mapping function is applied to the input image to generate an output image in the target bit depth.