Samsung Electronics Co., Ltd.

Li Tao

Yeong-Taeg Kim

Pradeep Nagesh

Chenguang Liu

Chang Su

Bo Yang

Soojung Hyun

Seongnam Oh

A method includes receiving a quantized video having a first maximum luminance level or brightness associated with a mastering display with which the quantized video was mastered. The method also includes de-quantizing the quantized video in order to generate a de-quantized video. The method further includes applying a scene-adaptive tone mapping function to the de-quantized video in order to generate a tone mapped video. In addition, the method includes displaying the tone mapped video on a target display. The tone mapped video has a second maximum luminance level or brightness associated with the target display, and the second maximum luminance level or brightness is less than the first maximum luminance level or brightness.

HDR tone mapping methods with scene adaptive parameterized tone map function

A method, apparatus, and non-transitory computer readable medium for video tone mapping. The method includes a target display receiving a quantized video generated by a master display, the quantized video being mastered for a first range of luminance values associated with the master display; receiving metadata from a tone mapping curve parameter extraction, the metadata comprising at least one maximum value of a luminance parameter of the quantized video as mastered for the first range of luminance values; and de-quantizing the quantized video to produce a de-quantized video. The method also includes at least one processor of the target display applying a tone mapping function defined by a normalized Bezier curve to the de-quantized video; and generating, based on applying the tone mapping function, a tone mapped video mastered for a second range of luminance values associated with the target display.

One embodiment provides a method comprising determining a target color gamut of a display device, an inner zone of the target color gamut, and an outer zone of the target color gamut. The method further comprises dynamically determining, based on the inner zone and the outer zone, a path along which an input color in a source color gamut of an input content moves. The input color is outside the inner zone. The method further comprises mapping the input color from the source color gamut to an output color in the outer zone based on the path. The input color is rendered as the output color during presentation of the input content on the display device.

Color gamut mapping in the CIE 1931 color space

A method, apparatus, and non-transitory computer readable medium for video tone mapping. The method includes receiving the video and determining parameters of a tone mapping function defined by a Bezier curve for processing the video. The method also includes generating, by at least one processor, a tone mapped video by applying the tone mapping function to the video using the determined parameters.

A method comprising receiving an input video signal comprising high dynamic range (HDR) video for presentation on a display device, and receiving metadata for the input video signal. The metadata comprises a first Bezier curve for tone mapping of the HDR video that fits a first peak luminance level. The method further comprises adjusting the first Bezier curve to a second Bezier curve for tone mapping of the HDR video that fits a second peak luminance level. The display device has the second peak luminance level, and the second peak luminance level is different from the first peak luminance level. The method further comprises producing a tone mapped video signal of the input video signal utilizing the second Bezier curve. The tone mapped video signal is provided to the display device for presentation.

Guided tone mapping of high dynamic range video based on a Bezier curve for presentation on a display device

A perceptual hue preserved (PHP) color gamut transferring (CGT) method carried out in CIE-1931 color space includes obtaining a target gamut based on a rendering device of a content. Multiple color-moving constraints (CMC) are retrieved from a dataset. Perceptually consistent hue loci (PCHL) of out-of-gamut (OOG) colors of the content are estimated according to the CMC and a protection zone boundary. Each of the OOG colors are moved along its PCHL to a final point inside the target gamut based on a CGT plan data. The CGT plan data includes target and source boundary information formed using the CMC and the protection zone boundary.

Perceptual hue preserved color-gamut transferring in non-uniform CIE-1931 color space

A method for video tone mapping includes receiving an overlay indication from an input data stream indicating whether a graphic is being overlaid on image data for a High Dynamic Range (HDR) scene. Based on the overlay indication, a hardware processor processes a video stream using a first tone mapping function to generate a first tone mapped video, or a second tone mapping function to generate a second tone mapped video.

Adaptive high dynamic range (HDR) tone mapping with overlay indication

A method, apparatus, and computer-readable medium for video tone mapping. The method includes processing video data into a first video component and a second video component and applying tone mapping to the first video component. The method further includes scaling the second video component. The method further includes generating a tone mapped video by combining the tone-mapped first video component with the scaled second video component.

Dual band adaptive tone mapping

A method for tone mapping includes configuring, by at least one processor, at least one tone mapping function based on a measure of a distribution of luminance values within video data. The measure of a distribution of luminance values represents a luminance level at which a predetermined percentage of pixels of the video data have luminance values satisfying a threshold condition. The method includes generating a tone mapped video by applying the at least one configured tone mapping function to the video data.

Distribution-point-based adaptive tone mapping

A method for tone mapping includes applying, by at least one processor, at least two tone mapping functions to video data. The at least two tone mapping functions include a first tone mapping function and a second tone mapping function, such as a high tone mapping function and a low tone mapping function that provides an output having more illumination range to low luminance values of the video data than an output that the high tone mapping function provides. The method includes determining a mixing ratio based on an amount of the video data that has luminance values within a predetermined range. The mixing ratio represents a proportion of each of output of the at least two tone mapping functions. The method includes mixing the outputs of the at least two tone mapping functions according to the mixing ratio to generate the tone mapped video.

Tonal-zone adaptive tone mapping

A display system is configured to convert Full-High Definition (FHD) image content into Ultra-High Definition (UHD) image content. The display system includes an interface configured to receive image content comprising a first resolution, such as FHD. The display system also includes a display device configured to display image content at a second resolution, such as UHD, the second resolution greater than the first resolution. The display system further includes one or more processors configured to: convert the image content from the first resolution to the second resolution; recover a spatial frequency of the converted image content as a function of a relative edge growth rate measured from the converted image content and an offline-determined relationship between the relative edge growth rates of the converted first image and its corresponding ground truth image; and provide the converted image content with the recovered spatial frequency to the display device.

Image up-sampling with relative edge growth rate priors

A method, apparatus, and non-transitory computer readable medium for video tone mapping. The method includes receiving the video and metadata at least partially representative of a global tone mapping function. The method further includes determining the global tone mapping function based at least on the metadata and a characteristic of the display and generating a tone mapped video by applying the global tone mapping function to the video and using the peak luminance value of the display in the application of the global tone mapping function.

Tone mastering system with creative intent metadata

A method, apparatus, and non-transitory computer readable medium for video tone mapping. The method includes processing a video using at least first and second tone mapping functions to generate at least first and second tone mapped videos and identifying an amount of local contrast in one or more areas of each of the at least first and second tone mapped videos. The method further includes determining an amount of each of the at least first and second tone mapped videos to include in an output tone mapped video based at least in part on comparison of the identified amount of local contrast for each of the at least first and second tone mapped videos and generating the output tone mapped video in accordance with the determined amount of each of the at least first and second tone mapped videos.

Adaptive tone mapping based on local contrast

A display system converts Full-High Definition (FHD) image content into Ultra-High Definition (UHD) image content. The display system includes an interface that provides image content to a display having a first resolution. The display system also includes a processor that converts an input image from a second resolution to the first resolution. The first resolution is greater than the second resolution. The processor generates a first value corresponding to a lost high-frequency component (HFC) of the input image; generates an initial component of an output image; selects a patch of the input image; estimates a lost HFC of the patch of the initial component based on a portion of the lost HFC of the input image that corresponds to the selected patch; and generates the output image based on a sum of the patch of the initial component and the estimated lost HFC of the patch of the initial component.

System and method for content-adaptive super-resolution via cross-scale self-learning

An electronic system includes: a communication unit configured to provide a transport stream; a storage unit, coupled to the communication unit, configured to provide a stream from the transport stream; and a control unit, coupled to the storage unit, configured to restore details to the stream by a compression adaptive module for a high resolution output.

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Irvine, CA, United States of America

Li Tao