Patent
Apparatus and method for dynamic range transforming of images
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TLDR
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.Abstract:
An image processing apparatus comprises a receiver (201) for receiving an image signal comprising an encoded image. Another receiver (1701) receives a data signal from a display (107) where the data signal comprises a data field that comprises a display dynamic range indication of the display (107). The display dynamic range indication comprises at least one luminance specification for the display. A dynamic range processor (203) is arranged to generate an output image by applying a dynamic range transform to the encoded image in response to the display dynamic range indication. An output (205) outputs an output image signal comprising the output image to the display. The transform may furthermore be performed in response to a target display reference indicative of a dynamic range of display for which the encoded image is encoded. The invention may be used to generate an improved High Dynamic Range (HDR) image from e.g. a Low Dynamic Range (LDR) image, or vice versa.read more
Citations
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References
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Patent
Encoding, decoding, and representing high dynamic range images
TL;DR: In this article, a tone mapped image with HDR reconstruction data in the form of luminance ratios and color residual values is encoded and decoded to generate a restored HDR image free of the color alterations.
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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.
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Image display apparatus and image display method
Masahiro Baba,Goh Itoh +1 more
TL;DR: In this article, a backlight luminance calculating unit is used to calculate a light-emission luminance of the backlight such that a center value of a luminance range displayable on the liquid crystal panel defined depending on the lightemission of the rear light substantially agrees with the center values of luminances of pixels forming an input image.
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TL;DR: In this paper, an input video signal that is represented in a first color space with a first colour gamut, which is related to a first dynamic range, is converted to a video signal representing in a second color space and associated with a second dynamic range; at least two (e.g., three) color-related components of the converted video signal are mapped over the second dynamic ranges.
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Methods and systems for high dynamic range video coding
TL;DR: In this paper, the authors present methods and systems for high dynamic range video coding and decoding that is backwards compatible with one or more standard dynamic range (SDR) encoding and decoding techniques, through the transmission of HDR residual data used to reconstruct an encoded HDR sequence from an inverse-tone-mapped SDR sequence.