公开(公告)号：US11694372B2

公开(公告)日：2023-07-04

申请号：US17490321

申请日：2021-09-30

Applicant: GoPro, Inc.

Inventor： Guillaume Matthieu Guérin ,  Julien Caron

IPC: G06T11/00

CPC classification number: G06T11/001 ,  G06T2200/32

Abstract: Systems and methods are disclosed for non-linear color correction. The method including receiving an input image from an image sensor, converting the input image from a red, green, blue (RGB) color space format to an alternate color space format, determining localized hue correction parameters for a selected color in the alternate color space, determining localized saturation correction parameters for a selected hue in the alternate color space, applying the localized hue correction parameters and the localized saturation correction parameters to the input image to generate an output image and storing, displaying, or transmitting the output image based on at least the localized hue correction parameters and the localized saturation correction parameters.

公开(公告)号：US11641528B2

公开(公告)日：2023-05-02

申请号：US17531311

申请日：2021-11-19

Applicant: GoPro, Inc.

Inventor： Bruno César Douady ,  Guillaume Matthieu Guérin ,  Eric Chasseur

IPC: H04N5/217 ,  H04N5/232

Abstract: An image capture device may include an image sensor, a processor, and memory. The image sensor may be configured to obtain an image. The processor may be configured to: generate a grid on the image forming tiles; determine a fringing level of each vertex of the vertices; sort all of the tiles based on the fringing level of each tile so that the tiles are sorted in a descending order from the tile with a highest of the fringing levels to the tile with a lowest of the fringing levels; and apply a fringing compensation to a subset of the sorted tiles to obtain a processed image. The memory may be configured to store the processed image.

公开(公告)号：US20230044846A1

公开(公告)日：2023-02-09

申请号：US17965857

申请日：2022-10-14

Applicant: GoPro, Inc.

Inventor： Guillaume Matthieu Guérin ,  Karl Krissian ,  Bruno César Douady

IPC: H04N5/357 ,  H04N9/67 ,  G06T5/50 ,  H04N9/77

Abstract: Flare compensation includes obtaining a dark corner intensity differences profile between a first and a second image based on a relative illumination of an area outside a first image circle of the first image and a second image circle of the second image. The dark corner intensity differences profile is obtained for a luminance (Y) component. A flare profile is obtained using an intensity differences profile and the dark corner intensity differences profile. The intensity differences profile is obtained for the Y component along a stitch line between the first image and the second image. The flare profile of the Y component is converted to an RGB flare profile. The first image is modified based on the RGB flare profile to obtain a processed first image.

公开(公告)号：US11503232B2

公开(公告)日：2022-11-15

申请号：US16992679

申请日：2020-08-13

Applicant: GoPro, Inc.

Inventor： Guillaume Matthieu Guérin ,  Karl Krissian ,  Bruno César Douady

IPC: H04N5/357 ,  H04N9/67 ,  G06T5/50 ,  H04N9/77

Abstract: Flare compensation includes receiving a first image and a second image; converting the first and the second images from an RGB domain to a YUV domain; obtaining an intensity differences profile along a stitch line between the first and the second images, where the intensity differences profile is obtained for the Y component; obtaining a dark corner intensity differences profile between the first and the second images based on a relative illumination of an area outside a first image circle of the first image and a second image circle of the second image, where the dark corner intensity differences profile is obtained for the Y component; obtaining a flare profile using the intensity differences profile and the dark corner intensity differences profile; converting the flare profile of the Y component to an RGB flare profile; and modifying one of the first or second images based on the RGB flare profile.

公开(公告)号：US11405564B2

公开(公告)日：2022-08-02

申请号：US16991825

申请日：2020-08-12

Applicant: GoPro, Inc.

Inventor： Guillaume Matthieu Guérin ,  Balthazar Neveu ,  Sandra Vitorino

IPC: H04N5/265 ,  H04N5/243 ,  H04N5/247 ,  H04N9/73 ,  G06T5/50

Abstract: Methods for parameter alignment processing are described herein. An image capture device includes a first image capture device configured to capture a first image, a second image capture device configured to capture a second image, and an image signal processor connected to the first image capture device and to the second image capture device. The image signal processor is configured to apply, to the first image and the second image, at least two of a respective luminance lens shading (LLS) compensation factor, a respective color lens shading (CLS) compensation factor, a respective exposure difference compensation factor, a respective white balance compensation factor, a respective lens exposure correction (LEC) compensation factor, and a respective flare compensation factor, blend the compensated first image and the compensated second image to form a blended image, and output an image based on the blended image.

公开(公告)号：US20220232153A1

公开(公告)日：2022-07-21

申请号：US17713606

申请日：2022-04-05

Applicant: GoPro, Inc.

Inventor： Guillaume Matthieu Guérin ,  Sylvain Leroy ,  Yoël Taïeb ,  Giuseppe Moschetti

IPC: H04N5/225 ,  H04N5/235 ,  H04N13/156 ,  H04N9/77 ,  G06T3/40

Abstract: Auto exposure processing for spherical images improves image quality by reducing visible exposure level variation along a stitch line within a spherical image. An average global luminance value is determined based on auto exposure configurations of first and second image sensors. Delta luminance values are determined for each of the image sensors based on the average global luminance value and a luminance variance between the image sensors. The auto exposure configurations of the image sensors are then updated using the delta luminance values, and the updated auto exposure configurations are used to capture images which are then combined to produce the spherical image. In some cases wherein updating the auto exposure configurations using the delta luminance values would breach a threshold representing a target luminosity for the scene, the use of the delta luminance values may be limited or those values may instead be discarded.

公开(公告)号：US11228746B2

公开(公告)日：2022-01-18

申请号：US16968709

申请日：2019-02-15

Applicant: GoPro, Inc.

Inventor： Guillaume Matthieu Guérin ,  Violaine Marie Mong-Ian Sudret

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.

公开(公告)号：US20210321029A1

公开(公告)日：2021-10-14

申请号：US16843301

申请日：2020-04-08

Applicant: GoPro, Inc.

Inventor： Guillaume Matthieu Guérin ,  Julien Caron

IPC: H04N5/235 ,  G06T3/40 ,  G06T5/00 ,  G06T5/20

Abstract: Image capture devices and methods may use field variable tone mapping for 360 content. An image capture device may comprise an image sensor and a processor. The image sensor may capture a hyper-hemispherical image that includes an image circle portion and a dark corner portion. The processor may perform local tone mapping (LTM) on a first area of the image circle portion and perform global tone mapping (GTM) on a second area of pixels of the image circle portion. The GTM may be performed on a condition that a portion of a predefined area of pixels overlaps with a stitch line. The processor may be configured to stitch the hyper-hemispherical image and a second hyper-hemispherical image at the stitch line to obtain a processed image. The processor may be configured to display, store, output, or transmit the processed image.

公开(公告)号：US11138765B2

公开(公告)日：2021-10-05

申请号：US16655944

申请日：2019-10-17

Applicant: GoPro, Inc.

Inventor： Guillaume Matthieu Guérin ,  Julien Caron

IPC: G06T11/00

Abstract: Systems and methods are disclosed for non-linear color correction. The method including receiving an input image from an image sensor, converting the input image from a red, green, blue (RGB) color space format to an alternate color space format, determining localized hue correction parameters for a selected color in the alternate color space, determining localized saturation correction parameters for a selected hue in the alternate color space, applying the localized hue correction parameters and the localized saturation correction parameters to the input image to generate an output image and storing, displaying, or transmitting the output image based on at least the localized hue correction parameters and the localized saturation correction parameters.

公开(公告)号：US20210281751A1

公开(公告)日：2021-09-09

申请号：US16808576

申请日：2020-03-04

Applicant: GoPro, Inc.

Inventor： Guillaume Matthieu Guérin

IPC: H04N5/232 ,  H04N9/73 ,  H04N9/68 ,  H04N9/64

Abstract: An image capture device may obtain first frames at a first frame rate from a first image sensor and obtain second frames at a second frame rate from a second image sensor. The image capture device may process the first frames from the first image sensor and store the processed first frames in a memory. The image capture device may partially process the second frames from the second image sensor to obtain first camera control statistics. The image capture device may switch a capture mode to obtain third frames at the second frame rate from the first image sensor obtain fourth frames at the first frame rate from the second image sensor.