-
公开(公告)号：US20240354916A1
公开(公告)日：2024-10-24
申请号：US18752882
申请日：2024-06-25
IPC分类号： G06T5/92 , G06T5/50 , G06T11/00 , G09G3/20 , G09G5/00 , G09G5/10 , G11B20/10 , G11B27/10 , G11B27/32 , H04N7/00 , H04N9/68
CPC分类号： G06T5/92 , G06T5/50 , G06T11/001 , G09G3/2003 , G09G5/006 , G09G5/10 , G11B20/10 , G11B27/105 , G11B27/329 , H04N7/00 , H04N9/68 , G06T2207/20208 , G09G2320/0271 , G09G2320/0606 , G09G2320/0613 , G09G2320/066 , G09G2340/06 , G09G2360/144 , G09G2370/047
摘要： 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.
-
公开(公告)号：US20210142453A1
公开(公告)日：2021-05-13
申请号：US17152825
申请日：2021-01-20
IPC分类号： G06T5/00 , G06T5/50 , H04N9/68 , G11B20/10 , G11B27/10 , G11B27/32 , G09G5/00 , H04N7/00 , G09G5/10 , G06T11/00 , G09G3/20
摘要： 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.
-
公开(公告)号：US20210360266A1
公开(公告)日：2021-11-18
申请号：US17266650
申请日：2019-08-22
IPC分类号： H04N19/186 , H04N19/98 , H04N19/44
摘要： At least some applications in the total HDR video chain desire some more sophisticated approach, such as a high dynamic range video encoder (900), arranged to receive via an image input (920) an input high dynamic range image (MsterHDR) which has a first maximum pixel luminance (PB_C_H50), the encoder being arranged to receive via a metadata input (921) a master luma mapping function (FL_50t1), which luma mapping function defines the relationship between normalized lumas of the input high dynamic range image and normalized lumas of a corresponding standard dynamic range image (Im_LDR) having a maximum pixel luminance of preferably 100 nit, characterized in that the encoder further comprises a metadata input (923) to receive a second maximum pixel luminance (PB_CH), and the encoder further being characterized in that it comprises: —a HDR function generation unit (901) arranged to apply a standardized algorithm to transform the master luma mapping function (FL_50t1) into a adapted luma mapping function (F_H2hCI), which relates normalized lumas of the input high dynamic range image to normalized luminances of an intermediate dynamic range image (IDR) which is characterized by having a maximum possible luminance being equal to the second maximum pixel luminance (PB_CH); an IDR image calculation unit (902) arranged to apply the adapted luma mapping function (F_H2hCI) to lumas of pixels of the input high dynamic range image (MsterHDR) to obtain lumas of pixels of the intermediate dynamic range image (IDR); and an IDR mapping function generator (903) arranged to derive on the basis of the master luma mapping function (FL_50t1) and the adapted luma mapping function (F_H2hCI) a channel luma mapping function (F_I2sCI), which defines as output the respective normalized lumas of the standard dynamic range image (Im_LDR) when given as input the respective normalized lumas of the intermediate dynamic range image (IDR); the encoder being further characterized to have as output: the intermediate dynamic range image (IDR), as first metadata the second maximum pixel luminance (PB_CH), as second metadata the channel luma mapping function (F_I2sCI); and as third metadata the first maximum pixel luminance (PB_C_H50).
-
公开(公告)号：US20220343477A1
公开(公告)日：2022-10-27
申请号：US17860166
申请日：2022-07-08
IPC分类号： G06T5/00 , G06T5/50 , H04N9/68 , G11B20/10 , G11B27/10 , G11B27/32 , G09G5/00 , H04N7/00 , G09G5/10 , G06T11/00 , G09G3/20
摘要： 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.
-
-
-
搜索结果
4 条记录 (耗时 0.013 秒)
