公开(公告)号：US10019785B2

公开(公告)日：2018-07-10

申请号：US15063462

申请日：2016-03-07

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chia-Jung Hsu ,  Wan-Ching Tsai ,  Chao-Wei Ho ,  Chih-Chia Kuo

IPC: G06T5/00 ,  G09G5/02

CPC classification number: G06T5/009 ,  G06T2207/20208 ,  G09G5/02 ,  G09G5/026 ,  G09G2320/0276 ,  G09G2320/066 ,  G09G2320/0666 ,  G09G2320/0673 ,  G09G2340/0428 ,  G09G2340/06 ,  G09G2360/144

Abstract: A method of performing luminance/brightness adjustment and gamut mapping to high dynamic range images for a display device includes receiving an input image to analyze an image distribution of the input image, generating a scene information of the input image according to the image distribution, and performing luminance/brightness adjustment and gamut mapping to the input image according to the scene information, to generate an output image corresponding to the input image, wherein the scene information is regarded as dynamic metadata of the input image.

公开(公告)号：US20170256039A1

公开(公告)日：2017-09-07

申请号：US15063462

申请日：2016-03-07

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chia-Jung Hsu ,  Wan-Ching Tsai ,  Chao-Wei Ho ,  Chih-Chia Kuo

IPC: G06T5/00 ,  G09G5/02

CPC classification number: G06T5/009 ,  G06T2207/20208 ,  G09G5/02 ,  G09G5/026 ,  G09G2320/0276 ,  G09G2320/066 ,  G09G2320/0666 ,  G09G2320/0673 ,  G09G2340/0428 ,  G09G2340/06 ,  G09G2360/144

Abstract: A method of performing luminance/brightness adjustment and gamut mapping to high dynamic range images for a display device includes receiving an input image to analyze an image distribution of the input image, generating a scene information of the input image according to the image distribution, and performing luminance/brightness adjustment and gamut mapping to the input image according to the scene information, to generate an output image corresponding to the input image, wherein the scene information is regarded as dynamic metadata of the input image.

公开(公告)号：US10516810B2

公开(公告)日：2019-12-24

申请号：US15992206

申请日：2018-05-30

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chia-Jung Hsu ,  Wan-Ching Tsai ,  Chao-Wei Ho ,  Chih-Chia Kuo

IPC: H04N1/60 ,  H04N9/64 ,  H04N1/64 ,  G06T5/00 ,  H04N19/12 ,  H04N19/186 ,  H04N19/46 ,  G06T5/40 ,  H04N5/235 ,  H04N19/30

Abstract: A method of performing gamut mapping on an input image for an image output device includes receiving the input image to analyze a color distribution of the input image; determining a protect range corresponding to a first percentage of color codes of the input image and a compression range corresponding to a second percentage of the color codes of the input image based on the color distribution of the input image; and moving at least one of the color codes of the input image outside the protect range of the color codes to the compression range by a compression algorithm to perform gamut mapping on the input image.

公开(公告)号：US20180278808A1

公开(公告)日：2018-09-27

申请号：US15992206

申请日：2018-05-30

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chia-Jung Hsu ,  Wan-Ching Tsai ,  Chao-Wei Ho ,  Chih-Chia Kuo

IPC: H04N1/60 ,  G06T5/40 ,  G06T5/00 ,  H04N19/30 ,  H04N5/235

CPC classification number: H04N1/6061 ,  G06T5/007 ,  G06T5/009 ,  G06T5/40 ,  G06T2207/10024 ,  G06T2207/20208 ,  H04N1/64 ,  H04N5/235 ,  H04N9/64 ,  H04N19/12 ,  H04N19/186 ,  H04N19/30 ,  H04N19/46

Abstract: A method of performing gamut mapping on an input image for an image output device includes receiving the input image to analyze a color distribution of the input image; determining a protect range corresponding to a first percentage of color codes of the input image and a compression range corresponding to a second percentage of the color codes of the input image based on the color distribution of the input image; and moving at least one of the color codes of the input image outside the protect range of the color codes to the compression range by a compression algorithm to perform gamut mapping on the input image.

公开(公告)号：US09613409B1

公开(公告)日：2017-04-04

申请号：US15012871

申请日：2016-02-02

Applicant: NOVATEK Microelectronics Corp.

Inventor： Wan-Ching Tsai ,  Chao-Wei Ho ,  Chia-Jung Hsu ,  Chih-Chia Kuo

IPC: G09G5/02 ,  G06T5/00 ,  G09G3/34

CPC classification number: G06T5/009 ,  G06T2207/20208 ,  G09G3/3406 ,  G09G3/3426 ,  G09G2320/0626 ,  G09G2320/08 ,  G09G2340/06

Abstract: An image converting method includes calculating a plurality of segment averages of pixel values in a plurality segments of an input image; acquiring the maximum among the segment averages as a first threshold; calculating a plurality of local averages of pixel values in adjacent segments of input image; acquiring the maximum among local averages as a second threshold; counting the number of pixel values exceeding first threshold in the segments as a plurality of first pixel counts and counting the number of pixel values exceeding second threshold in the segments as a plurality of second pixel counts; generating a specular map and a confidence according to the first pixel counts and the second pixel counts; mapping the input image according to the specular map, to generate an intermediate image; and blending the input image and the intermediate image according to the confidence, to generate an output image.