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Auto white balance (AWB) is applied by camera hardware at capture time to remove the color cast caused by the scene illumination. The vast majority of white-balance algorithms assume a single light source illuminates the scene; however,…

Computer Vision and Pattern Recognition · Computer Science 2021-10-11 Mahmoud Afifi , Marcus A. Brubaker , Michael S. Brown

The image signal processor (ISP) pipeline in modern cameras consists of several modules that transform raw sensor data into visually pleasing images in a display color space. Among these, the auto white balance (AWB) module is essential for…

Computer Vision and Pattern Recognition · Computer Science 2025-08-18 Luxi Zhao , Mahmoud Afifi , Michael S. Brown

White balance (WB) algorithms in many commercial cameras assume single and uniform illumination, leading to undesirable results when multiple lighting sources with different chromaticities exist in the scene. Prior research on…

Computer Vision and Pattern Recognition · Computer Science 2024-02-29 Dongyoung Kim , Jinwoo Kim , Junsang Yu , Seon Joo Kim

White balance (WB) is one of the first photo-finishing steps used to render a captured image to its final output. WB is applied to remove the color cast caused by the scene's illumination. Interactive photo-editing software allows users to…

Computer Vision and Pattern Recognition · Computer Science 2020-09-29 Mahmoud Afifi , Michael S. Brown

Style may refer to different concepts (e.g. painting style, hairstyle, texture, color, filter, etc.) depending on how the feature space is formed. In this work, we propose a novel idea of interpreting the lighting in the single- and…

Computer Vision and Pattern Recognition · Computer Science 2022-10-18 Furkan Kınlı , Doğa Yılmaz , Barış Özcan , Furkan Kıraç

Nighttime color constancy still remains a challenging problem in computational photography due to low-light noise and complex illumination conditions. We present RL-AWB, a novel framework combining statistical methods with deep…

Computer Vision and Pattern Recognition · Computer Science 2026-04-07 Yuan-Kang Lee , Kuan-Lin Chen , Chia-Che Chang , Yu-Lun Liu

Auto-white balance (AWB) correction is a critical operation in image signal processors for accurate and consistent color correction across various illumination scenarios. This paper presents a novel and efficient AWB correction method that…

Computer Vision and Pattern Recognition · Computer Science 2023-08-09 Furkan Kınlı , Doğa Yılmaz , Barış Özcan , Furkan Kıraç

White balance (WB) is a key step in the image signal processor (ISP) pipeline that mitigates color casts caused by varying illumination and restores the scene's true colors. Currently, sRGB-based WB editing for post-ISP WB correction is…

Computer Vision and Pattern Recognition · Computer Science 2025-12-12 Yang Cheng , Ziteng Cui , Shenghan Su , Lin Gu , Zenghui Zhang

This thesis presents methods and approaches to image color correction, color enhancement, and color editing. To begin, we study the color correction problem from the standpoint of the camera's image signal processor (ISP). A camera's ISP is…

Computer Vision and Pattern Recognition · Computer Science 2021-07-29 Mahmoud Afifi

Traditional auto white balance (AWB) algorithms typically assume a single global illuminant source, which leads to color distortions in multi-illuminant scenes. While recent neural network-based methods have shown excellent accuracy in such…

Image and Video Processing · Electrical Eng. & Systems 2025-02-07 Wenjun Wei , Yanlin Qian , Huaian Chen , Junkang Dai , Yi Jin

White balance (WB) correction in scenes with multiple illuminants remains a persistent challenge in computer vision. Recent methods explored fusion-based approaches, where a neural network linearly blends multiple sRGB versions of an input…

Computer Vision and Pattern Recognition · Computer Science 2025-03-20 David Serrano-Lozano , Aditya Arora , Luis Herranz , Konstantinos G. Derpanis , Michael S. Brown , Javier Vazquez-Corral

Contemporary approaches frame the color constancy problem as learning camera specific illuminant mappings. While high accuracy can be achieved on camera specific data, these models depend on camera spectral sensitivity and typically exhibit…

Computer Vision and Pattern Recognition · Computer Science 2020-03-03 Daniel Hernandez-Juarez , Sarah Parisot , Benjamin Busam , Ales Leonardis , Gregory Slabaugh , Steven McDonagh

Digital camera pipelines employ color constancy methods to estimate an unknown scene illuminant, in order to re-illuminate images as if they were acquired under an achromatic light source. Fully-supervised learning approaches exhibit…

Computer Vision and Pattern Recognition · Computer Science 2019-04-05 Steven McDonagh , Sarah Parisot , Fengwei Zhou , Xing Zhang , Ales Leonardis , Zhenguo Li , Gregory Slabaugh

White balancing is a fundamental step in the image processing pipeline. The process involves estimating the chromaticity of the illuminant or light source and using the estimate to correct the image to remove any color cast. Given the…

Computer Vision and Pattern Recognition · Computer Science 2017-03-17 Peter van Beek , R. Wayne Oldford

In a surround view system, the image color and tone captured by multiple cameras can be different due to cameras applying auto white balance (AWB), global tone mapping (GTM) individually for each camera. The color and brightness along…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Yuzhuo Ren , Yining Deng , David Pajak , Robin Jenkin , Niranjan Avadhanam , Varsha Hedau

Computational color constancy, or white balancing, is a key module in a camera's image signal processor (ISP) that corrects color casts from scene lighting. Because this operation occurs in the camera-specific raw color space, white balance…

Computer Vision and Pattern Recognition · Computer Science 2025-12-17 Dongyoung Kim , Mahmoud Afifi , Dongyun Kim , Michael S. Brown , Seon Joo Kim

We present "Cross-Camera Convolutional Color Constancy" (C5), a learning-based method, trained on images from multiple cameras, that accurately estimates a scene's illuminant color from raw images captured by a new camera previously unseen…

Computer Vision and Pattern Recognition · Computer Science 2022-02-14 Mahmoud Afifi , Jonathan T. Barron , Chloe LeGendre , Yun-Ta Tsai , Francois Bleibel

The multitude of data generated by sensors available on users' mobile devices, combined with advances in machine learning techniques, support context-aware services in recognizing the current situation of a user (i.e., physical context) and…

Machine Learning · Computer Science 2023-06-29 Mattia Giovanni Campana , Dimitris Chatzopoulos , Franca Delmastro , Pan Hui

Color constancy aims to restore the constant colors of a scene under different illuminants. However, due to the existence of camera spectral sensitivity, the network trained on a certain sensor, cannot work well on others. Also, since the…

Computer Vision and Pattern Recognition · Computer Science 2022-03-22 Xiaodong Cun , Zhendong Wang , Chi-Man Pun , Jianzhuang Liu , Wengang Zhou , Xu Jia , Houqiang Li

Computational color constancy has the important task of reducing the influence of the scene illumination on the object colors. As such, it is an essential part of the image processing pipelines of most digital cameras. One of the important…

Computer Vision and Pattern Recognition · Computer Science 2020-12-29 Egor Ershov , Alex Savchik , Illya Semenkov , Nikola Banić , Alexander Belokopytov , Daria Senshina , Karlo Koscević , Marko Subašić , Sven Lončarić
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