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In this paper we present a new camera calibration method aimed at finding a straight-line locus, in a special colour feature space, that is traversed by daylights and as well also approximately followed by specular points. The aim of the…

计算机视觉与模式识别 · 计算机科学 2017-12-14 Mark S. Drew , Hamid Reza Vaezi Joze , Graham D. Finlayson

In this paper, we consider the color-plus-mono dual-camera system and propose an end-to-end convolutional neural network to align and fuse images from it in an efficient and cost-effective way. Our method takes cross-domain and cross-scale…

计算机视觉与模式识别 · 计算机科学 2022-09-08 Yaping Zhao , Haitian Zheng , Mengqi Ji , Ruqi Huang

Implementing color constancy as a pre-processing step in contemporary digital cameras is of significant importance as it removes the influence of scene illumination on object colors. Several benchmark color constancy datasets have been…

计算机视觉与模式识别 · 计算机科学 2019-04-01 Nikola Banić , Karlo Koščević , Marko Subašić , Sven Lončarić

Color constancy and color illusion perception are two phenomena occurring in the human visual system, which can help us reveal unknown mechanisms of human perception. For decades computer vision scientists have developed numerous color…

计算机视觉与模式识别 · 计算机科学 2023-12-21 Oguzhan Ulucan , Diclehan Ulucan , Marc Ebner

Temporal Color Constancy (CC) is a recently proposed approach that challenges the conventional single-frame color constancy. The conventional approach is to use a single frame - shot frame - to estimate the scene illumination color. In…

计算机视觉与模式识别 · 计算机科学 2020-03-10 Yanlin Qian , Jani Käpylä , Joni-Kristian Kämäräinen , Samu Koskinen , Jiri Matas

Illuminant estimation aims to infer scene illumination from image measurements despite intrinsic ambiguities between surface reflectance and lighting. Most existing methods operate on trichromatic RGB images and are therefore fundamentally…

计算机视觉与模式识别 · 计算机科学 2026-05-14 G. Dofri Vidarsson , Liying Lu , Sabine Süsstrunk

Automatic colorization of gray images with objects of different colors and sizes is challenging due to inter- and intra-object color variation and the small area of the main objects due to extensive backgrounds. The learning process often…

计算机视觉与模式识别 · 计算机科学 2024-03-05 Mrityunjoy Gain , Avi Deb Raha , Rameswar Debnath

Deep Neural Networks (DNNs) have been widely used for illumination estimation, which is time-consuming and requires sensor-specific data collection. Our proposed method uses a dual-mapping strategy and only requires a simple white point…

计算机视觉与模式识别 · 计算机科学 2023-11-21 Shuwei Yue , Minchen Wei

Illumination estimation is the essential step of computational color constancy, one of the core parts of various image processing pipelines of modern digital cameras. Having an accurate and reliable illumination estimation is important for…

In this paper, a learning-free color constancy algorithm called the Patch-wise Bright Pixels (PBP) is proposed. In this algorithm, an input image is first downsampled and then cut equally into a few patches. After that, according to the…

计算机视觉与模式识别 · 计算机科学 2019-11-19 Yiyao Shi , Jian Wang , Xiangyang Xue

Image colorization is the process of colorizing grayscale images or recoloring an already-color image. This image manipulation can be used for grayscale satellite, medical and historical images making them more expressive. With the help of…

计算机视觉与模式识别 · 计算机科学 2023-09-27 Ahmed Samir Ragab , Shereen Aly Taie , Howida Youssry Abdelnaby

In this paper, we study the importance of pre-training for the generalization capability in the color constancy problem. We propose two novel approaches based on convolutional autoencoders: an unsupervised pre-training algorithm using a…

计算机视觉与模式识别 · 计算机科学 2020-05-26 Firas Laakom , Jenni Raitoharju , Alexandros Iosifidis , Jarno Nikkanen , Moncef Gabbouj

Achieving consistent color reproduction across multiple cameras is essential for seamless image fusion and Image Processing Pipeline (ISP) compatibility in modern devices, but it is a challenging task due to variations in sensors and…

计算机视觉与模式识别 · 计算机科学 2025-06-12 Peter Grönquist , Stepan Tulyakov , Dengxin Dai

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…

计算机视觉与模式识别 · 计算机科学 2020-09-29 Mahmoud Afifi , Michael S. Brown

Photo retouching aims to adjust the luminance, contrast, and saturation of the image to make it more human aesthetically desirable. However, artists' actions in photo retouching are difficult to quantitatively analyze. By investigating…

计算机视觉与模式识别 · 计算机科学 2022-06-01 Hailong Ma , Sibo Feng , Xi Xiao , Chenyu Dong , Xingyue Cheng

In this paper, we present Point Cloud Color Constancy, in short PCCC, an illumination chromaticity estimation algorithm exploiting a point cloud. We leverage the depth information captured by the time-of-flight (ToF) sensor mounted rigidly…

计算机视觉与模式识别 · 计算机科学 2024-07-30 Xiaoyan Xing , Yanlin Qian , Sibo Feng , Yuhan Dong , Jiri Matas

Advances in high dynamic range (HDR) lighting estimation from a single image have opened new possibilities for augmented reality (AR) applications. Predicting complex lighting environments from a single input image allows for the realistic…

计算机视觉与模式识别 · 计算机科学 2025-09-24 Zitian Zhang , Joshua Urban Davis , Jeanne Phuong Anh Vu , Jiangtao Kuang , Jean-François Lalonde

Dermoscopic skin images are often obtained with different imaging devices, under varying acquisition conditions. In this work, instead of attempting to perform intensity and color normalization, we propose to leverage computational color…

We present cmKAN, a versatile framework for color matching. Given an input image with colors from a source color distribution, our method effectively and accurately maps these colors to match a target color distribution in both supervised…

计算机视觉与模式识别 · 计算机科学 2025-03-18 Artem Nikonorov , Georgy Perevozchikov , Andrei Korepanov , Nancy Mehta , Mahmoud Afifi , Egor Ershov , Radu Timofte

As an important subtopic of image enhancement, color transfer aims to enhance the color scheme of a source image according to a reference one while preserving the semantic context. To implement color transfer, the palette-based color…

计算机视觉与模式识别 · 计算机科学 2024-05-15 Chenlei Lv , Dan Zhang