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Multimodal large language models (MLLMs) struggle with numerical regression under long-tailed target distributions. Token-level supervised fine-tuning (SFT) and point-wise regression rewards bias learning toward high-density regions,…

计算与语言 · 计算机科学 2026-05-12 Yao Du , Shanshan Song , Xiaomeng Li

Long-tailed problem has been an important topic in face recognition task. However, existing methods only concentrate on the long-tailed distribution of classes. Differently, we devote to the long-tailed domain distribution problem, which…

计算机视觉与模式识别 · 计算机科学 2020-04-01 Dong Cao , Xiangyu Zhu , Xingyu Huang , Jianzhu Guo , Zhen Lei

Deep learning algorithms face great challenges with long-tailed data distribution which, however, is quite a common case in real-world scenarios. Previous methods tackle the problem from either the aspect of input space (re-sampling classes…

计算机视觉与模式识别 · 计算机科学 2022-05-13 Jiequan Cui , Shu Liu , Zhuotao Tian , Zhisheng Zhong , Jiaya Jia

Real-world datasets often exhibit long-tailed distributions, where a few dominant "Head" classes have abundant samples while most "Tail" classes are severely underrepresented, leading to biased learning and poor generalization for the Tail.…

机器学习 · 计算机科学 2026-02-02 Mahdiyar Molahasani , Michael Greenspan , Ali Etemad

With the rapid advancement of remote sensing technology, super-resolution image reconstruction is of great research and practical significance. Existing deep learning methods have made progress but still face limitations in handling complex…

计算机视觉与模式识别 · 计算机科学 2025-07-24 Shijie Lyu

Long-tailed class imbalance remains a fundamental obstacle in semantic segmentation of high-resolution remote-sensing imagery, where dominant classes shape learned representations and rare classes are systematically under-segmented. This…

计算机视觉与模式识别 · 计算机科学 2026-04-28 Buddhi Wijenayake , Nichula Wasalathilake , Roshan Godaliyadda , Vijitha Herath , Parakrama Ekanayake , Vishal M. Patel

Large Vision-Language Models (LVLMs) have achieved significant progress in combining visual comprehension with language generation. Despite this success, the training data of LVLMs still suffers from Long-Tail (LT) problems, where the data…

计算机视觉与模式识别 · 计算机科学 2025-05-30 Mingyang Song , Xiaoye Qu , Jiawei Zhou , Yu Cheng

The long-tailed distribution is a common phenomenon in the real world. Extracted large scale image datasets inevitably demonstrate the long-tailed property and models trained with imbalanced data can obtain high performance for the…

计算机视觉与模式识别 · 计算机科学 2023-10-18 Konstantinos Panagiotis Alexandridis , Shan Luo , Anh Nguyen , Jiankang Deng , Stefanos Zafeiriou

Methods for out-of-distribution (OOD) detection that scale to 3D data are crucial components of any real-world clinical deep learning system. Classic denoising diffusion probabilistic models (DDPMs) have been recently proposed as a robust…

Diffusion models have recently emerged as powerful frameworks for generating high-quality images. While recent studies have explored their application to time series forecasting, these approaches face significant challenges in cross-modal…

计算机视觉与模式识别 · 计算机科学 2025-02-24 Weilin Ruan , Siru Zhong , Haomin Wen , Yuxuan Liang

Scaling by training on large datasets has been shown to enhance the quality and fidelity of image generation and manipulation with diffusion models; however, such large datasets are not always accessible in medical imaging due to cost and…

计算机视觉与模式识别 · 计算机科学 2025-04-14 Yousef Yeganeh , Azade Farshad , Ioannis Charisiadis , Marta Hasny , Martin Hartenberger , Björn Ommer , Nassir Navab , Ehsan Adeli

Unsupervised learning of feature representations is a challenging yet important problem for analyzing a large collection of multimedia data that do not have semantic labels. Recently proposed neural network-based unsupervised learning…

计算机视觉与模式识别 · 计算机科学 2022-11-15 Takahiko Furuya , Ryutarou Ohbuchi

The current evaluation protocol of long-tailed visual recognition trains the classification model on the long-tailed source label distribution and evaluates its performance on the uniform target label distribution. Such protocol has…

计算机视觉与模式识别 · 计算机科学 2021-03-23 Youngkyu Hong , Seungju Han , Kwanghee Choi , Seokjun Seo , Beomsu Kim , Buru Chang

Label distributions in camera-trap images are highly imbalanced and long-tailed, resulting in neural networks tending to be biased towards head-classes that appear frequently. Although long-tail learning has been extremely explored to…

计算机视觉与模式识别 · 计算机科学 2022-02-17 Byeongjun Park , Jeongsoo Kim , Seungju Cho , Heeseon Kim , Changick Kim

Real-world imagery is often characterized by a significant imbalance of the number of images per class, leading to long-tailed distributions. An effective and simple approach to long-tailed visual recognition is to learn feature…

计算机视觉与模式识别 · 计算机科学 2022-01-14 Ahmet Iscen , André Araujo , Boqing Gong , Cordelia Schmid

Long-tailed (LT) classification is an unavoidable and challenging problem in the real world. Most existing long-tailed classification methods focus only on solving the class-wise imbalance while ignoring the attribute-wise imbalance. The…

计算机视觉与模式识别 · 计算机科学 2024-08-16 Jinye Yang , Ji Xu , Di Wu , Jianhang Tang , Shaobo Li , Guoyin Wang

Diffusion models have emerged as powerful tools for solving inverse problems due to their exceptional ability to model complex prior distributions. However, existing methods predominantly assume known forward operators (i.e., non-blind),…

计算机视觉与模式识别 · 计算机科学 2024-07-02 Weimin Bai , Siyi Chen , Wenzheng Chen , He Sun

3D perception plays an essential role for improving the safety and performance of autonomous driving. Yet, existing models trained on real-world datasets, which naturally exhibit long-tail distributions, tend to underperform on rare and…

机器人学 · 计算机科学 2025-05-27 Mahmut Yurt , Xin Ye , Yunsheng Ma , Jingru Luo , Abhirup Mallik , John Pauly , Burhaneddin Yaman , Liu Ren

Long-tailed image recognition is a computer vision problem considering a real-world class distribution rather than an artificial uniform. Existing methods typically detour the problem by i) adjusting a loss function, ii) decoupling…

计算机视觉与模式识别 · 计算机科学 2025-03-06 Youngseok Yoon , Sangwoo Hong , Hyungjun Joo , Yao Qin , Haewon Jeong , Jungwoo Lee

Training data for class-conditional image synthesis often exhibit a long-tailed distribution with limited images for tail classes. Such an imbalance causes mode collapse and reduces the diversity of synthesized images for tail classes. For…

计算机视觉与模式识别 · 计算机科学 2025-10-28 Fang Chen , Alex Villa , Gongbo Liang , Xiaoyi Lu , Meng Tang