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Latent variable models like the Variational Auto-Encoder (VAE) are commonly used to learn representations of images. However, for downstream tasks like semantic classification, the representations learned by VAE are less competitive than…

机器学习 · 统计学 2022-05-31 Mingtian Zhang , Tim Z. Xiao , Brooks Paige , David Barber

Hyperparameter optimization (HPO), formulated as black-box optimization (BBO), is recognized as essential for automation and high performance of machine learning approaches. The CMA-ES is a promising BBO approach with a high degree of…

机器学习 · 计算机科学 2020-12-15 Masahiro Nomura , Shuhei Watanabe , Youhei Akimoto , Yoshihiko Ozaki , Masaki Onishi

Meta-learning algorithms adapt quickly to new tasks that are drawn from the same task distribution as the training tasks. The mechanism leading to fast adaptation is the conditioning of a downstream predictive model on the inferred…

Models trained for classification often assume that all testing classes are known while training. As a result, when presented with an unknown class during testing, such closed-set assumption forces the model to classify it as one of the…

计算机视觉与模式识别 · 计算机科学 2019-04-03 Poojan Oza , Vishal M Patel

Metric learning aims at learning a distance which is consistent with the semantic meaning of the samples. The problem is generally solved by learning an embedding for each sample such that the embeddings of samples of the same category are…

机器学习 · 计算机科学 2018-09-13 Xu Zhang , Felix Xinnan Yu , Svebor Karaman , Wei Zhang , Shih-Fu Chang

In this study, we show that landmark detection or face alignment task is not a single and independent problem. Instead, its robustness can be greatly improved with auxiliary information. Specifically, we jointly optimize landmark detection…

计算机视觉与模式识别 · 计算机科学 2016-11-15 Zhanpeng Zhang , Ping Luo , Chen Change Loy , Xiaoou Tang

With the tremendous success of deep learning in visual tasks, the representations extracted from intermediate layers of learned models, that is, deep features, attract much attention of researchers. Previous empirical analysis shows that…

计算机视觉与模式识别 · 计算机科学 2020-03-31 Qi Qian , Juhua Hu , Hao Li

Representation of data on mixed variables, numerical and categorical types to get suitable feature map is a challenging task as important information lies in a complex non-linear manifold. The feature transformation should be able to…

机器学习 · 计算机科学 2020-09-22 Saswata Sahoo , Souradip Chakraborty

This paper proposes a novel deep subspace clustering approach which uses convolutional autoencoders to transform input images into new representations lying on a union of linear subspaces. The first contribution of our work is to insert…

计算机视觉与模式识别 · 计算机科学 2020-01-24 Mohsen Kheirandishfard , Fariba Zohrizadeh , Farhad Kamangar

Learning expressive representations for high-dimensional yet sparse features has been a longstanding problem in information retrieval. Though recent deep learning methods can partially solve the problem, they often fail to handle the…

Re-identification of individual animals in images can be ambiguous due to subtle variations in body markings between different individuals and no constraints on the poses of animals in the wild. Person re-identification is a similar task…

计算机视觉与模式识别 · 计算机科学 2020-01-10 Olga Moskvyak , Frederic Maire , Feras Dayoub , Mahsa Baktashmotlagh

Automatically optimizing the hyperparameters of Machine Learning algorithms is one of the primary open questions in AI. Existing work in Hyperparameter Optimization (HPO) trains surrogate models for approximating the response surface of…

机器学习 · 计算机科学 2023-05-23 Abdus Salam Khazi , Sebastian Pineda Arango , Josif Grabocka

Recent breakthroughs in deep learning often rely on representation learning and knowledge transfer. In recent years, unsupervised and self-supervised techniques for learning speech representation were developed to foster automatic speech…

计算与语言 · 计算机科学 2021-12-15 Pierre Beckmann , Mikolaj Kegler , Milos Cernak

We consider the problem of image representation for the tasks of unsupervised learning and semi-supervised learning. In those learning tasks, the raw image vectors may not provide enough representation for their intrinsic structures due to…

机器学习 · 计算机科学 2014-02-20 Yiyi Liao , Yue Wang , Yong Liu

Image-based table recognition is a challenging task due to the diversity of table styles and the complexity of table structures. Most of the previous methods focus on a non-end-to-end approach which divides the problem into two separate…

计算机视觉与模式识别 · 计算机科学 2023-03-30 Nam Tuan Ly , Atsuhiro Takasu

Deep neural networks can model images with rich latent representations, but they cannot naturally conceptualize structures of object categories in a human-perceptible way. This paper addresses the problem of learning object structures in an…

计算机视觉与模式识别 · 计算机科学 2018-04-13 Yuting Zhang , Yijie Guo , Yixin Jin , Yijun Luo , Zhiyuan He , Honglak Lee

Driving in a dynamic, multi-agent, and complex urban environment is a difficult task requiring a complex decision-making policy. The learning of such a policy requires a state representation that can encode the entire environment. Mid-level…

机器学习 · 计算机科学 2021-12-23 Eshagh Kargar , Ville Kyrki

How data is represented and operationalized is critical for building computational solutions that are both effective and efficient. A common approach is to represent data objects as binary vectors, denoted \textit{hash codes}, which require…

信息检索 · 计算机科学 2021-09-07 Casper Hansen

Time-series classification is one of the most frequently performed tasks in industrial data science, and one of the most widely used data representation in the industrial setting is tabular representation. In this work, we propose a novel…

机器学习 · 计算机科学 2021-10-06 Sharath M Shankaranarayana , Davor Runje

Deep neural networks usually benefit from unsupervised pre-training, e.g. auto-encoders. However, the classifier further needs supervised fine-tuning methods for good discrimination. Besides, due to the limits of full-connection, the…

计算机视觉与模式识别 · 计算机科学 2016-05-10 Hailin Shi , Xiangyu Zhu , Zhen Lei , Shengcai Liao , Stan Z. Li