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Over the last decade, the process of automatic image colorization has been of significant interest for several application areas including restoration of aged or degraded images. This problem is highly ill-posed due to the large degrees of…

Computer Vision and Pattern Recognition · Computer Science 2018-07-16 Kamyar Nazeri , Eric Ng , Mehran Ebrahimi

Image colorization, the task of adding colors to grayscale images, has been the focus of significant research efforts in computer vision in recent years for its various application areas such as color restoration and automatic animation…

Computer Vision and Pattern Recognition · Computer Science 2025-08-20 Changyuan Qiu , Hangrui Cao , Qihan Ren , Ruiyu Li , Yuqing Qiu

Colorization of grayscale images has been a hot topic in computer vision. Previous research mainly focuses on producing a colored image to match the original one. However, since many colors share the same gray value, an input grayscale…

Computer Vision and Pattern Recognition · Computer Science 2017-07-04 Yun Cao , Zhiming Zhou , Weinan Zhang , Yong Yu

The colorization of grayscale images is an ill-posed problem, with multiple correct solutions. In this paper, we propose an adversarial learning colorization approach coupled with semantic information. A generative network is used to infer…

Computer Vision and Pattern Recognition · Computer Science 2020-01-22 Patricia Vitoria , Lara Raad , Coloma Ballester

This paper addresses the automatic colorization problem, which converts a gray-scale image to a colorized one. Recent deep-learning approaches can colorize automatically grayscale images. However, when it comes to different scenes which…

Computer Vision and Pattern Recognition · Computer Science 2025-02-26 Youssef Mourchid , Marc Donias , Yannick Berthoumieu , Mohamed Najim

In this paper, we present a color transfer algorithm to colorize a broad range of gray images without any user intervention. The algorithm uses a machine learning-based approach to automatically colorize grayscale images. The algorithm uses…

Graphics · Computer Science 2017-04-18 Raj Kumar Gupta , Alex Yong-Sang Chia , Deepu Rajan , Huang Zhiyong

Recently, Generative Adversarial Network (GAN) has been found wide applications in style transfer, image-to-image translation and image super-resolution. In this paper, a color-depth conditional GAN is proposed to concurrently resolve the…

Computer Vision and Pattern Recognition · Computer Science 2018-11-29 Lijun Zhao , Huihui Bai , Jie Liang , Bing Zeng , Anhong Wang , Yao Zhao

We propose a novel approach to automatically produce multiple colorized versions of a grayscale image. Our method results from the observation that the task of automated colorization is relatively easy given a low-resolution version of the…

Computer Vision and Pattern Recognition · Computer Science 2017-06-07 Sergio Guadarrama , Ryan Dahl , David Bieber , Mohammad Norouzi , Jonathon Shlens , Kevin Murphy

We present the Colorization Transformer, a novel approach for diverse high fidelity image colorization based on self-attention. Given a grayscale image, the colorization proceeds in three steps. We first use a conditional autoregressive…

Computer Vision and Pattern Recognition · Computer Science 2021-03-09 Manoj Kumar , Dirk Weissenborn , Nal Kalchbrenner

In this project we have designed and described a model which colourize a gray-scale image, with no human intervention. We propose a fully automatic process of colouring and re-colouring faded or gray-scale image with vibrant and pragmatic…

Computer Vision and Pattern Recognition · Computer Science 2023-12-18 Aditya Parikh

Existing video colorization methods struggle with temporal flickering or demand extensive manual input. We propose a novel approach automating high-fidelity video colorization using rich semantic guidance derived from language and…

Computer Vision and Pattern Recognition · Computer Science 2025-12-01 Silvia Dani , Tiberio Uricchio , Lorenzo Seidenari

Colorization is the method of converting an image in grayscale to a fully color image. There are multiple methods to do the same. Old school methods used machine learning algorithms and optimization techniques to suggest possible colors to…

Computer Vision and Pattern Recognition · Computer Science 2019-06-19 Shreyank Narayana Gowda

This paper tackles the challenge of colorizing grayscale images. We take a deep convolutional neural network approach, and choose to take the angle of classification, working on a finite set of possible colors. Similarly to a recent paper,…

Computer Vision and Pattern Recognition · Computer Science 2018-11-09 Vincent Billaut , Matthieu de Rochemonteix , Marc Thibault

In this work recent advances in conditional adversarial networks are investigated to develop an end-to-end architecture based on Convolutional Neural Networks (CNNs) to directly map realistic colours to an input greyscale image. Observing…

Image and Video Processing · Electrical Eng. & Systems 2019-09-06 Marc Górriz , Marta Mrak , Alan F. Smeaton , Noel E. O'Connor

We present a fully automatic approach to video colorization with self-regularization and diversity. Our model contains a colorization network for video frame colorization and a refinement network for spatiotemporal color refinement. Without…

Computer Vision and Pattern Recognition · Computer Science 2019-08-06 Chenyang Lei , Qifeng Chen

Automatic colorization of images without human intervention has been a subject of interest in the machine learning community for a brief period of time. Assigning color to an image is a highly ill-posed problem because of its innate nature…

Image and Video Processing · Electrical Eng. & Systems 2021-12-30 Shreyas Kalvankar , Hrushikesh Pandit , Pranav Parwate , Atharva Patil , Snehal Kamalapur

We develop a fully automatic image colorization system. Our approach leverages recent advances in deep networks, exploiting both low-level and semantic representations. As many scene elements naturally appear according to multimodal color…

Computer Vision and Pattern Recognition · Computer Science 2017-08-15 Gustav Larsson , Michael Maire , Gregory Shakhnarovich

Colorization has attracted increasing interest in recent years. Classic reference-based methods usually rely on external color images for plausible results. A large image database or online search engine is inevitably required for…

Computer Vision and Pattern Recognition · Computer Science 2022-08-09 Yanze Wu , Xintao Wang , Yu Li , Honglun Zhang , Xun Zhao , Ying Shan

Decolorization is the process to convert a color image or video to its grayscale version, and it has received great attention in recent years. An ideal decolorization algorithm should preserve the original color contrast as much as…

Graphics · Computer Science 2014-04-23 Wei Hu , Wei Li , Fan Zhang , Qian Du

Video colorization task has recently attracted wide attention. Recent methods mainly work on the temporal consistency in adjacent frames or frames with small interval. However, it still faces severe challenge of the inconsistency between…

Computer Vision and Pattern Recognition · Computer Science 2023-05-16 Yu Zhang , Siqi Chen , Mingdao Wang , Xianlin Zhang , Chuang Zhu , Yue Zhang , Xueming Li
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