公开(公告)号：WO2013055492A1

公开(公告)日：2013-04-18

申请号：PCT/US2012/055317

申请日：2012-09-14

Applicant: APPLE INC. ,  BAI, Yingjun ,  ZHANG, Xuemei ,  KUO, David

Inventor： BAI, Yingjun ,  ZHANG, Xuemei ,  KUO, David

IPC: H04N1/409 ,  H04N1/60 ,  H04N9/43

CPC classification number: H04N1/6086 ,  H04N1/409 ,  H04N9/735

Abstract: Methods, devices and computer readable media for implementing a "selective gray world" approach for color balancing are described. The disclosed techniques involve the use of noise-optimized selection criteria and, more specifically, in some embodiments, the interpolation between corresponding values in noise-optimized weighting tables when calculating white balance gains. Estimated scene lux levels may provide a valuable indicator of expected scene noise levels. The image processing techniques described herein may be executed by an image capture device or a general purpose processor (e.g., personal computer) executing a user- level software application. The described color balancing techniques may be implemented by dedicated or general purpose hardware, general application software, or a combination of software and hardware in a computer system.

Abstract translation: 描述了用于实现用于颜色平衡的“选择性灰色世界”方法的方法，设备和计算机可读介质。 所公开的技术涉及使用噪声优化的选择标准，更具体地，在一些实施例中，在计算白平衡增益时，噪声优化加权表中的对应值之间的内插。 估计的场景勒克斯等级可以提供预期场景噪声水平的有价值的指标。 本文描述的图像处理技术可以由执行用户级软件应用的图像捕获设备或通用处理器（例如，个人计算机）执行。 所描述的颜色平衡技术可以由计算机系统中的专用或通用硬件，通用应用软件或软件和硬件的组合来实现。

公开(公告)号：WO2015184208A1

公开(公告)日：2015-12-03

申请号：PCT/US2015/033086

申请日：2015-05-29

Applicant: APPLE INC.

Inventor： ZHANG, Xuemei ,  TICO, Marius ,  BAI, Yingjun ,  BAQAI, Farhan, A. ,  RICCARDI, Fabio ,  CHEN, Juanqing ,  HUBEL, Paul, M. ,  WILLIAMS, George, E. ,  SACHS, Todd, S. ,  LIANG, Yongfang

IPC: G06T5/00 ,  H04N5/355 ,  H04N5/235

CPC classification number: H04N5/2355 ,  G06K9/4642 ,  G06K9/4661 ,  G06T5/001 ,  G06T5/009 ,  G06T5/40 ,  G06T2207/10144 ,  G06T2207/20016 ,  G06T2207/20208 ,  G06T2207/20221 ,  H04N5/23245 ,  H04N5/265 ,  H04N5/91

Abstract: Systems, methods, and computer readable media to capture and process high dynamic range (HDR) images when appropriate for a scene are disclosed. When appropriate, multiple images at a single - slightly underexposed - exposure value are captured (making a constant bracket HDR capture sequence) and local tone mapping (LTM) applied to each image. Local tone map and histogram information can be used to generate a noise-amplification mask which can be used during fusion operations. Images obtained and fused in the disclosed manner provide high dynamic range with improved noise and de- ghosting characteristics.

Abstract translation: 公开了适用于场景时捕获和处理高动态范围（HDR）图像的系统，方法和计算机可读介质。 在适当的情况下，捕获单个稍微曝光不足的曝光值的多个图像（使得恒定的支架HDR捕获序列）和本地色调映射（LTM）应用于每个图像。 本地色调图和直方图信息可用于生成可在融合操作期间使用的噪声放大掩模。 以所公开的方式获得和融合的图像提供高动态范围，具有改进的噪声和重影特性。

公开(公告)号：EP4471755A3

公开(公告)日：2024-12-18

申请号：EP24173977.0

申请日：2024-05-03

Applicant: Apple Inc.

Inventor： CAO, Renbo ,  ZHAO, Yonghui ,  BAI, Yingjun ,  ZHANG, Xuemei

IPC: G09G3/20

Abstract: An electronic device is provided that includes one or more image sensors configured to capture a video feed, an image signal processor configured to perform color correction on the captured video feed based on a brightness level computed from the captured video feed and/or based on a color temperature or illuminant type of the lighting in the captured video feed to generate a corresponding color corrected video feed using a first chromatic adaptation model that is adapted to an immersive viewing condition, and one or more displays configured to output the color corrected video feed. The electronic device can further include a recording pipeline configured to record a version of the captured video feed and can share or transmit the recorded content to an external device. The external device can display the recorded content using a second chromatic adaptation model that is adapted to a non-immersive viewing condition.

公开(公告)号：EP4471755A2

公开(公告)日：2024-12-04

申请号：EP24173977.0

申请日：2024-05-03

Applicant: Apple Inc.

Inventor： CAO, Renbo ,  ZHAO, Yonghui ,  BAI, Yingjun ,  ZHANG, Xuemei

IPC: G09G3/20

Abstract: An electronic device is provided that includes one or more image sensors configured to capture a video feed, an image signal processor configured to perform color correction on the captured video feed based on a brightness level computed from the captured video feed and/or based on a color temperature or illuminant type of the lighting in the captured video feed to generate a corresponding color corrected video feed using a first chromatic adaptation model that is adapted to an immersive viewing condition, and one or more displays configured to output the color corrected video feed. The electronic device can further include a recording pipeline configured to record a version of the captured video feed and can share or transmit the recorded content to an external device. The external device can display the recorded content using a second chromatic adaptation model that is adapted to a non-immersive viewing condition.