公开(公告)号：US20230351562A1

公开(公告)日：2023-11-02

申请号：US18304651

申请日：2023-04-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Bowen Zhao ,  Chenguang Liu ,  Dung Trung Vo ,  McClain Craig Nelson ,  Chang Su

IPC: G06T5/00 ,  G06V10/70 ,  G06V10/56 ,  G06T5/40

CPC classification number: G06T5/009 ,  G06V10/70 ,  H04N23/741 ,  G06V10/56 ,  G06T5/40 ,  G06T2207/20081 ,  G06T2207/10024 ,  G06T2207/20208

Abstract: One embodiment provides a method comprising receiving, as input, standard dynamic range (SDR) content, and obtaining statistics information corresponding to the SDR content. The method further comprises determining, based on the statistics information, one or more parameters for an inverse tone mapping (ITM) curve using a machine learning model. The method further comprises converting the SDR content to high dynamic range (HDR) content using the ITM curve. The resulting HDR content is provided to a display device for presentation.

公开(公告)号：US20230222991A1

公开(公告)日：2023-07-13

申请号：US18151902

申请日：2023-01-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chang Su ,  Chenguang Liu ,  Pradeep Nagesh

IPC: G09G5/02 ,  G09G5/00 ,  H04N9/68

CPC classification number: G09G5/02 ,  G09G5/005 ,  H04N9/68 ,  G09G2320/0666 ,  G09G2340/06

Abstract: A method includes modeling, by a computing device, color saturation variations of different hues in a working color space with one or more properties of responses of a human vision system (HVS) to color stimulus. The computing device further generates one or more color saturation variation models based on the responses of the HVS to color stimulus.

公开(公告)号：US20240221134A1

公开(公告)日：2024-07-04

申请号：US18496317

申请日：2023-10-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Tingting Zhao ,  Chang Su ,  Chenguang Liu

IPC: G06T5/00

CPC classification number: G06T5/009 ,  G06T2207/20208

Abstract: One embodiment provides a computer-implemented method that includes employing a de-banding process based on image statistics in a dynamic range conversion system, including high dynamic range (HDR) to standard dynamic range (SDR) tone mapping (TM) process or SDR-to-HDR inverse tone mapping (ITM) process. A computing device performs the de-banding process in post-processing during a determination of one or more initial ITM explicit polynomial curve coefficients. One or more parameters of a weighing function of the one or more initial ITM explicit curve coefficients are utilized as one or more controlling knots for balancing a de-banding effect and preserving local detail.

公开(公告)号：US20230197035A1

公开(公告)日：2023-06-22

申请号：US18173676

申请日：2023-02-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chang Su ,  Chenguang Liu ,  Pradeep Nagesh

IPC: G09G5/06

CPC classification number: G09G5/06 ,  G09G2340/06

Abstract: One embodiment provides a method comprising determining a first representation of a source gamut of an input content in a first (2D) device-independent color space, determining a second representation of a target gamut of a display device in a second 2D device-independent color space, and determining a color transition protection zone (TPZ) based on the source gamut and the target gamut. The method further comprises utilizing a color gamut mapping (CGM) module to perform, based on the TPZ, linear color gamut compression from the first 2D device-independent color space to the second 2D device-independent color space if the target gamut is narrower than the source gamut. The method further comprises utilizing the same CGM module to perform, based on the TPZ, linear color gamut extension from the first 2D device-independent color space to the second 2D device-independent color space if the target gamut is wider than the source gamut.

公开(公告)号：US20230120505A1

公开(公告)日：2023-04-20

申请号：US18053304

申请日：2022-11-07

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Chenguang Liu ,  William Mandel ,  Dung Trung Vo ,  McClain C. Nelson ,  Soojung Hyun

IPC: G06T5/00

Abstract: One embodiment provides a method comprising determining metadata corresponding to an input image, determining a black level of a display device and a peak luminance value of the display device, and determining a tone mapping function that adaptively compensates for the black level of the display device based on the metadata, the black level of the display device, and the peak luminance value of the display device. The metadata comprises a distribution of luminance values in the input image. The black level of the display device and the peak luminance value of the display device represent a lowest luminance value and a highest luminance value, respectively, achievable on the display device. The method further comprises applying the tone mapping function to the input image to generate a tone-mapped image that adaptively compensates for the black level of the display device and provided to the display device for presentation.

公开(公告)号：US11615763B2

公开(公告)日：2023-03-28

申请号：US17460009

申请日：2021-08-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Chang Su ,  Chenguang Liu ,  Pradeep Nagesh

IPC: G09G5/02 ,  G09G5/06 ,  H04N1/60 ,  H04N9/64 ,  H04N9/69

Abstract: One embodiment provides a method comprising determining a first representation of a source gamut of an input content in a first two-dimensional (2D) device-independent color space, determining a second representation of a target gamut of a display device in a second 2D device-independent color space, and determining a color transition protection zone (TPZ) based on the source gamut and the target gamut. The method further comprises utilizing a color gamut mapping (CGM) module to perform, based on the TPZ, linear color gamut compression from the first 2D device-independent color space to the second 2D device-independent color space if the target gamut is narrower than the source gamut. The method further comprises utilizing the same CGM module to perform, based on the TPZ, linear color gamut extension from the first 2D device-independent color space to the second 2D device-independent color space if the target gamut is wider than the source gamut.

公开(公告)号：US20220157273A1

公开(公告)日：2022-05-19

申请号：US17491085

申请日：2021-09-30

Applicant: Samsung Electronics Co., Ltd.

Inventor： Chang Su ,  Chenguang Liu ,  Pradeep Nagesh

IPC: G09G5/02 ,  H04N9/68 ,  G09G5/00

Abstract: A method includes determining, by a computing device, a working color space of a source content and a resulting content. The computing device models color saturation variations of different hues in the working color space with one or more properties of responses of a human vision system (HVS) to color stimulus. The computing device generates one or more color saturation variation models based on the responses of the HVS to color stimulus. An input color is mapped from the source content to an output color in the working color space using the one or more color saturation variation models.

公开(公告)号：US20220139355A1

公开(公告)日：2022-05-05

申请号：US17460009

申请日：2021-08-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Chang Su ,  Chenguang Liu ,  Pradeep Nagesh

IPC: G09G5/06

Abstract: One embodiment provides a method comprising determining a first representation of a source gamut of an input content in a first two-dimensional (2D) device-independent color space, determining a second representation of a target gamut of a display device in a second 2D device-independent color space, and determining a color transition protection zone (TPZ) based on the source gamut and the target gamut. The method further comprises utilizing a color gamut mapping (CGM) module to perform, based on the TPZ, linear color gamut compression from the first 2D device-independent color space to the second 2D device-independent color space if the target gamut is narrower than the source gamut. The method further comprises utilizing the same CGM module to perform, based on the TPZ, linear color gamut extension from the first 2D device-independent color space to the second 2D device-independent color space if the target gamut is wider than the source gamut.

公开(公告)号：US12211434B2

公开(公告)日：2025-01-28

申请号：US17818679

申请日：2022-08-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Joonsoo Kim ,  Kamal Jnawali ,  Chenguang Liu

IPC: G09G3/3208

Abstract: One embodiment provides a computer-implemented method that includes adaptively adjusting a detection time interval based on stationary region type of one or more stationary regions and a scene length in a video. The method further includes tracking pixels of the one or more stationary regions from a number of previous frames to a current frame in the video in real-time. A minimum and a maximum of max-Red-Green-Blue (MaxRGB) pixel values are extracted from each frame in a scene of the video as minimum and a maximum temporal feature maps for representing pixel variance over time. Segmentation and block matching are applied on the minimum and maximum temporal feature maps to detect the stationary region type.

公开(公告)号：US20240275930A1

公开(公告)日：2024-08-15

申请号：US18641119

申请日：2024-04-19

Applicant: Samsung Electronics Co., Ltd.

Inventor： Dung Trung Vo ,  Chenguang Liu ,  Chang Su ,  McClain C. Nelson ,  Madhu Athreya ,  William Mandel ,  Soojung Hyun

IPC: H04N9/73 ,  G06T5/92 ,  H04N9/64 ,  H04N9/68

CPC classification number: H04N9/73 ,  G06T5/92 ,  H04N9/646 ,  H04N9/68

Abstract: One embodiment provides a method comprising receiving an input content, and receiving ambient contextual data indicative of one or more ambient lighting conditions of an environment including a display device. The input content has corresponding metadata that at least partially represents a creative intent indicative of how the input content is intended to be viewed. The method further comprises adaptively correcting the input content based on the ambient contextual data to preserve the creative intent, and providing the corrected input content to the display device for presentation. The adaptively correcting comprises applying automatic white balancing to the input content to correct color tone of the input content.