Patent
Electronic device performing image conversion, and method thereof
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TLDR
In this paper, an electronic device and an image conversion method of the electronic device, the electronic devices comprising: a receiving unit for receiving a first image from a source device, a decoding unit for decoding brightness information of the first image, a converting unit for converting a dynamic range of the image on the basis of the decoded brightness information, using a mapping function, and a display unit for displaying a second image having the converted dynamic range on a display.Abstract:
An electronic device and an image conversion method of the electronic device, the electronic device comprising: a receiving unit for receiving a first image from a source device; a decoding unit for decoding brightness information of the first image; a converting unit for converting a dynamic range of the first image on the basis of the decoded brightness information, using a mapping function; and a display unit for displaying a second image having the converted dynamic range on a display, wherein the mapping function is a curve function including a plurality of points determined on the basis of the first image, a characteristic of a change in brightness of a display of the source device, and a characteristic of brightness of a scene of the first image. The present disclosure may generate, for example, a high dynamic range (HDR) image, which is improved from a standard dynamic range (SDR) image.read more
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Patent
Inverse tone mapping method and corresponding device
TL;DR: In this article, a method for obtaining expansion exponent map data for each one of a plurality of reference images, obtaining, for each cluster, one feature, called visual feature, representative of the luminance of the reference images of the cluster, obtaining a visual feature for the image, comparing the visual feature of the image with the visual features of the clusters according to a distance criterion, selecting the cluster which is the one feature that is the closest to the visual image, and applying an expansion exponent maps defined by the selected cluster to the image.
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A method for encoding an input video comprising a luma component and two chroma components, the method comprising reshaping of said input video based on reshaping functions
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References
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Patent
Apparatus and method for dynamic range transforming of images
TL;DR: In this article, a dynamic range transform is applied to the encoded image in response to the display dynamic range indication, which can be used to generate an improved High Dynamic Range image from e.g. a Low Dynamic Range (LDR) image, or vice versa.
Patent
Compatible compression of high dynamic range, visual dynamic range, and wide color gamut video
TL;DR: In this paper, a first image stream has a first dynamic range and a first color space, and a second image stream is encoded to obtain an encoded image stream, which is decoded to obtain a decoded image stream.
Patent
Method and apparatus for image data transformation
TL;DR: In this article, a sigmoidal transfer function is used to control min-tone contrast in the image data for display on a target display in a way that substantially preserves the creative intent embodied in the original image data.
Patent
High dynamic range images from low dynamic range images
Scott J. Daly,Laurence Meylan +1 more
TL;DR: In this article, a method for displaying an image includes receiving an image having a first luminance dynamic range and modifying the image to a second-level dynamic range free from being based upon other images, where the second dynamic range is greater than the first dynamic range.
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System and method for digital image tone mapping using an adaptive sigmoidal function based on perceptual preference guidelines
TL;DR: In this paper, an adaptive image tone mapping curve based on perceptual preference guidelines is generated as a sigmoidal function, in which the sigmoid function parameters (slope and shift) are determined by original image statistics.
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