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公开(公告)号：US20220191448A1
公开(公告)日：2022-06-16
申请号：US17559076
申请日：2021-12-22
Applicant: GoPro, Inc.
IPC: H04N9/68
Abstract: Image analysis and processing may include a multiple-tone-control (MTC) unit configured to obtain a tone-control gain lookup table, a plurality of MTC gain lookup tables, wherein the input image is divided into a plurality of blocks and wherein the plurality of MTC gain lookup tables includes a respective MTC gain lookup table corresponding to each respective block from the plurality of blocks, MTC grid parameters, MTC weighting parameters, a tone-control gain based on the tone-control gain lookup table, a MTC gain based on at least one MTC gain lookup table from the plurality of MTC gain lookup tables, the MTC grid parameters, and the MTC weighting parameters, and an output value based on the tone-control gain and the MTC gain.
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公开(公告)号：US11218630B2
公开(公告)日：2022-01-04
申请号：US16735156
申请日：2020-01-06
Applicant: GoPro, Inc.
Inventor： Bruno César Douady , Michael Serge Andre Kraak , Guillaume Matthieu Guérin , Thomas Nicolas Emmanuel Veit
IPC: H04N5/232 , H04N1/407 , G06T5/00 , H04N9/64 , H04N9/73 , H04N9/77 , H04N5/357 , H04N9/68 , H04N5/235 , G06T5/40 , G06T5/50 , G06T3/40 , H04N1/60 , H04N9/04
Abstract: 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：US11172139B2
公开(公告)日：2021-11-09
申请号：US16817074
申请日：2020-03-12
Applicant: GoPro, Inc.
Inventor： Guillaume Matthieu Guérin , Giuseppe Moschetti , Sylvain Leroy , Yoël Taïeb
Abstract: Auto exposure metering is adapted for spherical panoramic content. Using input image data, a first metering map is generated for a selected image sensor and a second metering map is generated for an unselected image sensor. Auto exposure level values for the selected image sensor and for the unselected image sensor are respectively metered using the first metering map and the second metering map, such as by adjusting luminance weights in certain locations of the respective image sensor panoramic image capture band. Hemispherical images are processed using the auto exposure metered level values and stitched together in a panoramic format to produce a spherical panoramic image. The metering maps are generated to account for areas of greatest image data importance relative to a primary orientation direction of the spherical panoramic image. This allows for effective auto exposure metering of such areas within the resulting spherical panoramic image.
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公开(公告)号：US20210342987A1
公开(公告)日：2021-11-04
申请号：US17285387
申请日：2019-06-13
Applicant: GoPro, Inc.
Inventor： Guillaume Matthieu Guérin , Bruno César Douady
Abstract: An image is processed using a combination of techniques, particularly, in which low frequency information is processed using multiple tone control and high frequency information is processed using local tone mapping. An image is divided into a plurality of blocks including a given block. Low frequency information and high frequency information of the given block are separated. The low frequency information is processed using multiple tone control. The low high frequency information is processed using local tone mapping. A processed image is then produced based on the processed low frequency information and based on the processed high frequency information, the processed image corresponding to the image captured using the image sensor. The processed image is then output for storage or display. Processing the low frequency information can include using a gain curve and bilinear interpolation. Processing the high frequency information can include using an edge preservation filter.
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公开(公告)号：US20210303824A1
公开(公告)日：2021-09-30
申请号：US17215408
申请日：2021-03-29
Applicant: GoPro, Inc.
Inventor： Guillaume Matthieu Guérin
Abstract: Face detection in a spherical image is performed using overcapture. Multiple views of a spherical image are separately processed using face detection, and results of the face detection for those views are projected to a format for further processing of the spherical image.
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Patent Agency Ranking
公开(公告)号：US20210289118A1
公开(公告)日：2021-09-16
申请号：US16817074
申请日：2020-03-12
Applicant: GoPro, Inc.
Inventor： Guillaume Matthieu Guérin , Giuseppe Moschetti , Sylvain Leroy , Yoël Taïeb
Abstract: Auto exposure metering is adapted for spherical panoramic content. Using input image data, a first metering map is generated for a selected image sensor and a second metering map is generated for an unselected image sensor. Auto exposure level values for the selected image sensor and for the unselected image sensor are respectively metered using the first metering map and the second metering map, such as by adjusting luminance weights in certain locations of the respective image sensor panoramic image capture band. Hemispherical images are processed using the auto exposure metered level values and stitched together in a panoramic format to produce a spherical panoramic image. The metering maps are generated to account for areas of greatest image data importance relative to a primary orientation direction of the spherical panoramic image. This allows for effective auto exposure metering of such areas within the resulting spherical panoramic image.
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公开(公告)号：US20210258468A1
公开(公告)日：2021-08-19
申请号：US17239589
申请日：2021-04-24
Applicant: GoPro, Inc.
Inventor： Guillaume Matthieu Guérin
Abstract: An image capture device may capture two hemispherical views of a scene. The two hemispherical view of the scene may be stitched along a stitch line. The image capture device may be rotated to align the stitch line with a mid-line of a panoramic field of view of the scene. Separate exposure settings may be used to capture the two hemispherical views of the scene, with the exposure settings increasing the dynamic range of the scene depicted within the panoramic field of view of the scene. The panoramic field of view of the scene may be punched out as panoramic visual content.
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公开(公告)号：US20210217150A1
公开(公告)日：2021-07-15
申请号：US17132357
申请日：2020-12-23
Applicant: GoPro, Inc.
Inventor： Heng Zhang , Thomas Nicolas Emmanuel, Veit , Guillaume Matthieu Guérin
Abstract: Systems and methods are disclosed for image signal processing. For example, methods may include accessing an image from an image sensor; detecting an object area on the image; classifying the object area on the image; applying a filter to an object area of the image to obtain a low-frequency component image and a high-frequency component image; determining a first enhanced image based on a weighted sum of the low-frequency component image and the high-frequency component image, where the high-frequency component image is weighted more than the low-frequency component image; determining a second enhanced image based on the first enhanced image and a tone mapping; and storing, displaying, or transmitting an output image based on the second enhanced image.
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公开(公告)号：US20210176388A1
公开(公告)日：2021-06-10
申请号：US17132140
申请日：2020-12-23
Applicant: GoPro, Inc.
Abstract: An image capture apparatus may include an image sensor, a motion sensor, and an auto-exposure unit. The auto-exposure unit may obtain an input image captured during an exposure interval and corresponding motion data indicating motion of the image capture apparatus during the exposure interval. The auto-exposure unit may obtain image information-amount data for the input image. The auto-exposure unit may obtain derivative information-amount data based on the information-amount data and a candidate exposure adjustment. The auto-exposure unit may obtain an information-amount maximizing exposure interval based on the information-amount data and the derivative information-amount data. The image capture apparats may control the image sensor to obtain a subsequent input image signal representing a subsequent input image captured during the information-amount maximizing exposure interval, and output or store information representing the subsequent input image.
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公开(公告)号：US10999527B1
公开(公告)日：2021-05-04
申请号：US16791850
申请日：2020-02-14
Applicant: GoPro, Inc.
Inventor： Guillaume Matthieu Guérin
Abstract: An image capture device may capture two hemispherical views of a scene. The two hemispherical view of the scene may be stitched along a stitch line. The image capture device may be rotated to align the stitch line with a mid-line of a panoramic field of view of the scene. Separate exposure settings may be used to capture the two hemispherical views of the scene, with the exposure settings increasing the dynamic range of the scene depicted within the panoramic field of view of the scene. The panoramic field of view of the scene may be punched out as panoramic visual content.
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