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Reference-based sketch colorization methods have garnered significant attention for the potential application in animation and digital illustration production. However, most existing methods are trained with image triplets of sketch,…

Graphics · Computer Science 2025-08-26 Dingkun Yan , Xinrui Wang , Zhuoru Li , Suguru Saito , Yusuke Iwasawa , Yutaka Matsuo , Jiaxian Guo

Diffusion models have recently demonstrated their effectiveness in generating extremely high-quality images and are now utilized in a wide range of applications, including automatic sketch colorization. Although many methods have been…

Computer Vision and Pattern Recognition · Computer Science 2024-07-04 Dingkun Yan , Liang Yuan , Erwin Wu , Yuma Nishioka , Issei Fujishiro , Suguru Saito

Reference-based sketch colorization methods have garnered significant attention due to their potential applications in the animation production industry. However, most existing methods are trained with image triplets of sketch, reference,…

Computer Vision and Pattern Recognition · Computer Science 2025-04-10 Dingkun Yan , Xinrui Wang , Yusuke Iwasawa , Yutaka Matsuo , Suguru Saito , Jiaxian Guo

Sketch colorization plays an important role in animation and digital illustration production tasks. However, existing methods still meet problems in that text-guided methods fail to provide accurate color and style reference, hint-guided…

Computer Vision and Pattern Recognition · Computer Science 2025-02-28 Dingkun Yan , Xinrui Wang , Zhuoru Li , Suguru Saito , Yusuke Iwasawa , Yutaka Matsuo , Jiaxian Guo

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

Coloring line art images based on the colors of reference images is an important stage in animation production, which is time-consuming and tedious. In this paper, we propose a deep architecture to automatically color line art videos with…

Computer Vision and Pattern Recognition · Computer Science 2020-03-31 Min Shi , Jia-Qi Zhang , Shu-Yu Chen , Lin Gao , Yu-Kun Lai , Fang-Lue Zhang

Sketch colorization is a critical task for automating and assisting in the creation of animations and digital illustrations. Previous research identified the primary difficulty as the distribution shift between semantically aligned training…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Dingkun Yan , Xinrui Wang , Ru Wang , Zhuoru Li , Jinze Yu , Yusuke Iwasawa , Yutaka Matsuo , Jiaxian Guo

Humans effortlessly grasp the connection between sketches and real-world objects, even when these sketches are far from realistic. Moreover, human sketch understanding goes beyond categorization -- critically, it also entails understanding…

Computer Vision and Pattern Recognition · Computer Science 2023-07-25 Xuanchen Lu , Xiaolong Wang , Judith E Fan

We propose a novel reference-based video colorization framework with spatiotemporal correspondence. Reference-based methods colorize grayscale frames referencing a user input color frame. Existing methods suffer from the color leakage…

Computer Vision and Pattern Recognition · Computer Science 2020-11-26 Naofumi Akimoto , Akio Hayakawa , Andrew Shin , Takuya Narihira

The benefits of medical imaging are enormous. Medical images provide considerable amounts of anatomical information and this facilitates medical practitioners in performing effective disease diagnosis and deciding upon the best course of…

Computer Vision and Pattern Recognition · Computer Science 2022-10-18 Sudarshan Devkota , Summanta Pattanaik

We propose a new algorithm for color transfer between images that have perceptually similar semantic structures. We aim to achieve a more accurate color transfer that leverages semantically-meaningful dense correspondence between images. To…

Computer Vision and Pattern Recognition · Computer Science 2018-12-13 Mingming He , Jing Liao , Dongdong Chen , Lu Yuan , Pedro V. Sander

Recent remarkable improvements in large-scale text-to-image generative models have shown promising results in generating high-fidelity images. To further enhance editability and enable fine-grained generation, we introduce a…

Computer Vision and Pattern Recognition · Computer Science 2023-04-20 Kangyeol Kim , Sunghyun Park , Junsoo Lee , Jaegul Choo

Exemplar-based image colorization aims to colorize a grayscale image using a reference color image, ensuring that reference colors are applied to corresponding input regions based on their semantic similarity. To achieve accurate semantic…

Computer Vision and Pattern Recognition · Computer Science 2025-05-28 Satoshi Kosugi

As pre-trained text-to-image diffusion models have become a useful tool for image synthesis, people want to specify the results in various ways. This paper tackles training-free appearance transfer, which produces an image with the…

Computer Vision and Pattern Recognition · Computer Science 2025-10-21 Sooyeon Go , Kyungmook Choi , Minjung Shin , Youngjung Uh

Recently, realistic image generation using deep neural networks has become a hot topic in machine learning and computer vision. Images can be generated at the pixel level by learning from a large collection of images. Learning to generate…

Computer Vision and Pattern Recognition · Computer Science 2017-05-09 Yifan Liu , Zengchang Qin , Zhenbo Luo , Hua Wang

Image search engines rely on appropriately designed ranking features that capture various aspects of the content semantics as well as the historic popularity. In this work, we consider the role of colour in this relevance matching process.…

Information Retrieval · Computer Science 2020-06-18 Paridhi Maheshwari , Manoj Ghuhan , Vishwa Vinay

This paper investigates into the colorization problem which converts a grayscale image to a colorful version. This is a very difficult problem and normally requires manual adjustment to achieve artifact-free quality. For instance, it…

Computer Vision and Pattern Recognition · Computer Science 2016-05-03 Zezhou Cheng , Qingxiong Yang , Bin Sheng

Finding point-wise correspondences between images is a long-standing problem in image analysis. This becomes particularly challenging for sketch images, due to the varying nature of human drawing style, projection distortions and viewport…

Computer Vision and Pattern Recognition · Computer Science 2021-01-05 Pablo Navarro , José Ignacio Orlando , Claudio Delrieux , Emmanuel Iarussi

We propose a new method for producing color images from sketches. Current solutions in sketch colorization either necessitate additional user instruction or are restricted to the "paired" translation strategy. We leverage semantic image…

Computer Vision and Pattern Recognition · Computer Science 2023-01-23 Samet Hicsonmez , Nermin Samet , Emre Akbas , Pinar Duygulu

Recent colorization works implicitly predict the semantic information while learning to colorize black-and-white images. Consequently, the generated color is easier to be overflowed, and the semantic faults are invisible. As a human…

Computer Vision and Pattern Recognition · Computer Science 2021-08-17 Man M. Ho , Lu Zhang , Alexander Raake , Jinjia Zhou
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