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公开(公告)号：US20200260001A1
公开(公告)日：2020-08-13
申请号：US16735156
申请日：2020-01-06
申请人： GoPro, Inc.
发明人： Bruno César Douady-Pleven , Michael Serge Andre Kraak , Guillaume Matthieu Guérin , Thomas Nicolas Emmanuel Veit
IPC分类号： H04N5/232 , H04N5/357 , H04N9/04 , H04N1/60 , G06T5/00 , G06T3/40 , H04N5/235 , H04N9/68 , H04N9/64 , G06T5/50 , H04N9/77 , H04N9/73 , H04N1/407
摘要： A system accesses an image with each pixel of the image having luminance values each representative of a color component of the pixel. The system generates a first histogram for aggregate luminance values of the image, and accesses a target histogram for the image representative of a desired global image contrast. The system computes a transfer function based on the first histogram and the target histogram such that when the transfer function is applied, a histogram of the modified aggregate luminance values is within a threshold similarity of the target histogram. The system modifies the image by applying the transfer function to the luminance values of the image to produce a tone mapped image, and outputs the modified image.
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公开(公告)号：US10742945B2
公开(公告)日：2020-08-11
申请号：US16349931
申请日：2018-02-26
发明人： Takeshi Hirota , Susumu Miyajima , Akira Yoneda , Yoshiichiro Kashiwagi , Toshiroh Nishio , Masayuki Kozuka
摘要： A luminance characteristics generation method includes: determining, for each of frames included in a video, a value as first luminance characteristics, the value being obtained by dividing the number of pixels having luminances less than or equal to a first luminance among all pixels included in the frame by the number of all the pixels included in the frame; and outputting the first luminance characteristics determined in the determining of the value.
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公开(公告)号：US20200228681A1
公开(公告)日：2020-07-16
申请号：US16783478
申请日：2020-02-06
发明人： Wei CHEN , Zisheng CAO
摘要： A method for color correction includes obtaining a noise evaluation image and a corrected noise evaluation image, determining a peak signal-to-noise ratio (PSNR) difference by comparing the noise evaluation image and the corrected noise evaluation image, obtaining a downsampled noise evaluation image and a downsampled corrected noise evaluation image, determining a downsampled PSNR difference by comparing the downsampled noise evaluation image and the downsampled corrected noise evaluation image, and determining a noise amplification metric based on a weighted average of the PSNR difference and the downsampled PSNR difference.
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公开(公告)号：US10715775B2
公开(公告)日：2020-07-14
申请号：US16246294
申请日：2019-01-11
申请人： LG ELECTRONICS INC.
发明人： Kyuri Kim
摘要： The present invention discloses a multimedia device for processing a video signal and control method thereof. According to an embodiment of the present invention, the multimedia device includes a controller configured to perform tone mapping, a dynamic contrast function, and a local contrast function. The controller performs the tone mapping not only on an HDR video signal but also on an SDR video signal. When performing the tone mapping on the SDR video signal, the controller amplifies only an intermediate-gradient region without adjusting low-gradient and high-gradient regions. When performing the dynamic contrast function, the controller only an intermediate-gradient region of the video signal without adjusting low-gradient and high-gradient regions. When performing the local contrast function, the controller divides the video signal into blocks, calculates an APL value of each block, and then applies a linear curve based on the APL value.
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公开(公告)号：US10708565B2
公开(公告)日：2020-07-07
申请号：US16447211
申请日：2019-06-20
发明人： Tadamasa Toma , Masayuki Kozuka , Takahiro Nishi
摘要： In a converting method relating to picture luminance according to one aspect of the present disclosure, the picture luminance is formed by luminance values in a first luminance range. In this method, a first luminance signal that indicates code values obtained by quantizing the luminance value of the picture is obtained, code values, which are associated with the code values indicated by the obtained first luminance signal by quantization for a second luminance range different in a maximum value from the first luminance range are determined as converted code values, and the first luminance signal is converted into a second luminance signal indicating the converted code values. As a result, the converting method is further improved.
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36.发明授权公开(公告)号：US10666891B2
公开(公告)日：2020-05-26
申请号：US16378948
申请日：2019-04-09
发明人： Tadamasa Toma , Masayuki Kozuka , Takahiro Nishi , Kengo Terada
IPC分类号： H04N5/57 , H04N9/68 , H04N5/20 , G09G5/10 , H04N5/765 , H04N21/436 , H04N21/84 , G11B20/10 , G11B27/10 , G11B27/30 , H04N5/775 , H04N7/08 , H04N21/4363 , G09G5/00
摘要： An apparatus according to one aspect of the present disclosure includes: one or more memories, and circuitry which, in operation; decodes a video stream to generate a first video signal with a first luminance range; acquires characteristic data indicating the luminance range of the first video signal; converts the characteristic data into control information according to a predetermined transmission protocol; and outputs the control information in accordance with the predetermined transmission protocol.
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公开(公告)号：US10659745B2
公开(公告)日：2020-05-19
申请号：US16349923
申请日：2018-02-26
发明人： Takeshi Hirota , Susumu Miyajima , Akira Yoneda , Yoshiichiro Kashiwagi , Toshiroh Nishio , Masayuki Kozuka
摘要： A video display device includes: a video receiver that obtains video data including a video and dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the video; a tone mapping processor that, in the case where a luminance region having a luminance less than or equal to a first luminance is defined as a low luminance region, and a luminance region having a luminance exceeding the first luminance is defined as a high luminance region, (i) performs first tone mapping using first conversion characteristics when first luminance characteristics exceed a predetermined threshold value, and (ii) performs second tone mapping using second conversion characteristics when the first luminance characteristics are less than or equal to the predetermined threshold value.
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38.发明申请公开(公告)号：US20200154149A1
公开(公告)日：2020-05-14
申请号：US16743877
申请日：2020-01-15
申请人： SONY CORPORATION
发明人： Ikuo TSUKAGOSHI
IPC分类号： H04N21/234 , H04N21/81 , H04N21/438 , H04N21/4402 , H04N19/70 , H04N21/2343 , H04N21/84 , H04N21/235 , H04N21/2389 , H04N5/20 , H04N9/68 , H04N21/435
摘要： A transmission device including circuitry is provided. The circuitry is configured to apply photoelectric conversion characteristics to high dynamic range video data to obtain transmission video data. The circuitry is configured to transmit a container including a video stream obtained by encoding the transmission video data. The circuitry is configured to insert type information to designate the type of conversion characteristics corresponding to the applied photoelectric conversion characteristics for photoelectric conversion of the transmission video data into a layer of the video stream and/or a layer of the container. The type of the conversion characteristics designated by the type information is determined regardless of luminance of a display.
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公开(公告)号：US20200107001A1
公开(公告)日：2020-04-02
申请号：US16541326
申请日：2019-08-15
申请人： MEDIATEK INC.
发明人： Yaozhi LIAO
摘要： An electronic device and an associated image processing method are disclosed. The method includes: receiving an image to be processed, and determining whether the image to be processed is a non-standard image; when the determination result is affirmative, automatically converting the image to be processed as a non-standard image into a standard image adapted to a signal output range of the electronic device; and outputting the standard image. With the above method, a non-standard image can be converted to a standard image and outputted without involving manual adjustment of a user, thereby improving image output effects of the electronic device and satisfying user utilization requirements.
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公开(公告)号：US20200099909A1
公开(公告)日：2020-03-26
申请号：US16585570
申请日：2019-09-27
摘要： Described are concepts, systems and techniques related to processing an input video signal intended for a first display to produce an output signal appropriate for a second display. The concepts, systems and techniques include converting using one or more transfer functions arranged to provide relative scene light values and remove or apply rendering intent of the input or output video signal, wherein the removing or applying rendering intent alters luminance.
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