Color Balance Circuits, E.g., White Balance Circuits, Color Temperature Control (epo) Patents (Class 348/E9.051)
  • Patent number: 11935322
    Abstract: Devices, methods, and non-transitory program storage devices are disclosed to: obtain an input image; identify a first face in the input image; divide the first face into a plurality of regions; identify obstructions in one or more of the plurality of regions; select a subset of regions, based on the identified obstructions; and determine a white point for the first face based, at least in part, on the selected subset of regions. In some embodiments, obstructions may be identified using a face obstruction detection model (e.g., a logistic regression model trained based on a large dataset of annotated facial images with and without obstructions). The identified obstructions may comprise, e.g., facial hair, head hair, glasses, a facial covering, a head covering, a face mask, or clothing. In some embodiments, a white balancing operation may be performed on the input image based, at least in part, on the determined white point.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: March 19, 2024
    Assignee: Apple Inc.
    Inventors: Renbo Cao, Christophe Seyve, Yonghui Zhao
  • Patent number: 11902671
    Abstract: A vehicle occupant monitoring system, OMS, comprises: an image acquisition device comprising an image sensor and a lens assembly having a varying transmissivity across a field of view of the image sensor; at least one infra-red, IR, light source disposed within a cabin of the vehicle and being configured to illuminate at least one occupant of the vehicle with varying illumination across the field of view of the image sensor; and an image processing pipeline configured to obtain and pre-process an image acquired from the image sensor in accordance with a lens shading map and a cabin illumination map in order to compensate for both the varying transmissivity and the varying illumination in order to provide a more uniformly illuminated image to a controller for further analysis.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: February 13, 2024
    Inventors: Istvan Andorko, Petronel Bigioi, Piotr Stec
  • Patent number: 11770605
    Abstract: A method includes operating a remote image capture system within a defined geolocation region. The remote image capture system includes a camera, position orientation controls for the camera, ambient sensors and a control unit. A user of a client device that enters the geolocation region is designated based upon identifying information received from the client device and user facial recognition data. Attributes of the geolocation region are communicated to the client device. An image capture location within the geolocation region is communicated to the client device. The client device is provided a prompt to activate the camera.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: September 26, 2023
    Assignee: Super Selfie, Inc
    Inventors: Paul Laine, Greg Shirakyan
  • Patent number: 11694420
    Abstract: An image stitching method includes: receiving a first image and a second image; determining that both the first image and the second image include a target object; obtaining a first brightness value and a second brightness value, the first brightness value being a brightness value of the target object in the first image, and the second brightness value being a brightness value of the target object in the second image; adjusting a brightness value of the first image and a brightness value of the second image according to the first brightness value and the second brightness value, so as to obtain a first image to be stitched and a second image to be stitched; and stitching the first image to be stitched and the second image to be stitched to obtain a first stitched image.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: July 4, 2023
    Assignee: FAURECIA CLARION ELECTRONICS (XIAMEN) CO., LTD.
    Inventors: Chen Shen, Jie Qiu
  • Patent number: 11620099
    Abstract: A system and method is provided for color matching two or more electronic displays of a display system. The method includes: obtaining first and second spectral response readings for first and second electronic displays from spectral response device(s); determining first and second spectral response curves based on the first and second spectral response readings; determining first and second spectral power distributions based on the first and second spectral response readings; determining a first device-to-independent color mapping based on the first spectral response curve and the first spectral power distribution; determining a second device-to-independent color mapping based on the second spectral response curve and the second spectral power distribution; and configuring a display system having the first electronic display and the second electronic display to match colors being displayed based on using the first device-to-independent color mapping and the second device-to-independent color mapping.
    Type: Grant
    Filed: May 27, 2022
    Date of Patent: April 4, 2023
    Assignee: Faurecia IRYStec Inc.
    Inventors: Jeremie Gerhardt, Hyunjin Yoo, Tara Akhavan, Gregory Ward
  • Patent number: 11516449
    Abstract: A pixel value calibration method includes: obtaining input image data generated by pixels, the input image data including a first group of pixel values in a first color plane and a second group of pixel values in a second color plane, generated by a first portion and a second portion of the pixels respectively; determining a difference function associated with filter response values and target values, the filter response values being generated by utilizing characteristic filter coefficients to filter first and second estimated pixel values of estimated pixel data in the first and second color planes, respectively; determining a set of calibration filter coefficients by calculating a solution of the estimated pixel data, the solution resulting in a minimum value of the difference function; and filtering the input image data, by a filter circuit using the set of calibration filter coefficients, to calibrate the first group of pixel values.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: November 29, 2022
    Assignee: REALTEK SEMICONDUCTOR CORPORATION
    Inventors: Wan-Ju Tang, Tsung-Hsuan Li, Shih-Tse Chen
  • Patent number: 11457188
    Abstract: The invention discloses a method and system for adjusting white balance, and a display, and belongs to the technical field of display. The method for adjusting the white balance is applied to the display, and comprises the following steps: identifying image information of a currently played frame image to be adjusted; obtaining a matched target color temperature value according to the image information; and adjusting a white balance parameter of the frame image to be adjusted according to the target color temperature value.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: September 27, 2022
    Inventor: Yong Wu
  • Patent number: 11438484
    Abstract: A disclosed scaler resource includes a color management module configured to support two or more color space transformations and two or more color temperature adjustment profiles and to receive first pixel data and perform color processing of the first pixel data to produce second pixel data. The color processing includes a color space transformation in accordance with any of the supported color space transformation matrices and a color temperature adjustment in accordance with any of the supported color temperature adjustment profiles. The color processing is configured wherein a ratio of primary colors produced by performing the color processing on first pixel data corresponding to any primary color is independent of the selected color temperature adjustment profile. The color space transformation may be performed before or after the color temperature adjustment. When performed before, the color transformation matrix is modified to reflect the color temperature adjust profile.
    Type: Grant
    Filed: January 27, 2021
    Date of Patent: September 6, 2022
    Assignee: Dell Products L.P.
    Inventors: Aik Keong Ong, Seen Yee Cindy Cheong
  • Patent number: 10048061
    Abstract: A measuring method and a measuring system are used for measuring contrast of a display device, including controlling the display device to display a first image, measuring brightness of a central area of the first image, controlling display device to display a second image, measuring brightness of a central area of the second image, and determining the contrast. Both the first image and the second image have a plurality of areas with different gray scales, the first image includes a maximum gray scale area, and the second image includes a minimum gray scale area.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: August 14, 2018
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Shengbao Dun, Zhongbao Wu, Li Sun, Hangman Lai, Yan Wei, Zhiying Zhang, Weili Zhao