Search Results for author: Vicente Ordonez

Found 40 papers, 25 papers with code

Visual Representation Learning from Unlabeled Video using Contrastive Masked Autoencoders

no code implementations21 Mar 2023 Jefferson Hernandez, Ruben Villegas, Vicente Ordonez

We show that visual representations learned under ViC-MAE generalize well to both video classification and image classification tasks.

Contrastive Learning Image Classification +3

Variation of Gender Biases in Visual Recognition Models Before and After Finetuning

no code implementations14 Mar 2023 Jaspreet Ranjit, Tianlu Wang, Baishakhi Ray, Vicente Ordonez

We also find that (2) models finetuned on larger scale datasets are more likely to introduce new biased associations.

Object Recognition

On the Transferability of Visual Features in Generalized Zero-Shot Learning

1 code implementation22 Nov 2022 Paola Cascante-Bonilla, Leonid Karlinsky, James Seale Smith, Yanjun Qi, Vicente Ordonez

Generalized Zero-Shot Learning (GZSL) aims to train a classifier that can generalize to unseen classes, using a set of attributes as auxiliary information, and the visual features extracted from a pre-trained convolutional neural network.

Generalized Zero-Shot Learning Knowledge Distillation +2

Improving Visual Grounding by Encouraging Consistent Gradient-based Explanations

no code implementations30 Jun 2022 Ziyan Yang, Kushal Kafle, Franck Dernoncourt, Vicente Ordonez

We propose a margin-based loss for vision-language model pretraining that encourages gradient-based explanations that are consistent with region-level annotations.

Language Modelling Referring Expression +2

Towards Understanding Gender-Seniority Compound Bias in Natural Language Generation

1 code implementation LREC 2022 Samhita Honnavalli, Aesha Parekh, Lily Ou, Sophie Groenwold, Sharon Levy, Vicente Ordonez, William Yang Wang

Our results show that GPT-2 amplifies bias by considering women as junior and men as senior more often than the ground truth in both domains.

Text Generation

SimVQA: Exploring Simulated Environments for Visual Question Answering

no code implementations CVPR 2022 Paola Cascante-Bonilla, Hui Wu, Letao Wang, Rogerio Feris, Vicente Ordonez

By exploiting 3D and physics simulation platforms, we provide a pipeline to generate synthetic data to expand and replace type-specific questions and answers without risking the exposure of sensitive or personal data that might be present in real images.

Data Augmentation Question Answering +1

Repairing Group-Level Errors for DNNs Using Weighted Regularization

1 code implementation24 Mar 2022 Ziyuan Zhong, Yuchi Tian, Conor J. Sweeney, Vicente Ordonez, Baishakhi Ray

In particular, it can repair confusion error and bias error of DNN models for both single-label and multi-label image classifications.

CLIP-Lite: Information Efficient Visual Representation Learning from Textual Annotations

1 code implementation14 Dec 2021 Aman Shrivastava, Ramprasaath R. Selvaraju, Nikhil Naik, Vicente Ordonez

We propose CLIP-Lite, an information efficient method for visual representation learning by feature alignment with textual annotations.

Contrastive Learning Representation Learning +5

Estimating and Maximizing Mutual Information for Knowledge Distillation

no code implementations29 Oct 2021 Aman Shrivastava, Yanjun Qi, Vicente Ordonez

Our empirical results show that MIMKD outperforms competing approaches across a wide range of student-teacher pairs with different capacities, with different architectures, and when student networks are with extremely low capacity.

Knowledge Distillation

Evolving Image Compositions for Feature Representation Learning

no code implementations16 Jun 2021 Paola Cascante-Bonilla, Arshdeep Sekhon, Yanjun Qi, Vicente Ordonez

This paper proposes PatchMix, a data augmentation method that creates new samples by composing patches from pairs of images in a grid-like pattern.

Data Augmentation Representation Learning +1

Instance-level Image Retrieval using Reranking Transformers

1 code implementation ICCV 2021 Fuwen Tan, Jiangbo Yuan, Vicente Ordonez

Instance-level image retrieval is the task of searching in a large database for images that match an object in a query image.

Image Retrieval Retrieval

Chair Segments: A Compact Benchmark for the Study of Object Segmentation

1 code implementation2 Dec 2020 Leticia Pinto-Alva, Ian K. Torres, Rosangel Garcia, Ziyan Yang, Vicente Ordonez

We aim for ChairSegments to be the equivalent of the CIFAR-10 dataset but for quickly designing and iterating over novel model architectures for segmentation.

Image Classification Object Discovery +2

General Multi-label Image Classification with Transformers

2 code implementations CVPR 2021 Jack Lanchantin, Tianlu Wang, Vicente Ordonez, Yanjun Qi

Multi-label image classification is the task of predicting a set of labels corresponding to objects, attributes or other entities present in an image.

Classification General Classification +1

Double-Hard Debias: Tailoring Word Embeddings for Gender Bias Mitigation

1 code implementation ACL 2020 Tianlu Wang, Xi Victoria Lin, Nazneen Fatema Rajani, Bryan McCann, Vicente Ordonez, Caiming Xiong

Word embeddings derived from human-generated corpora inherit strong gender bias which can be further amplified by downstream models.

Word Embeddings

Curriculum Labeling: Revisiting Pseudo-Labeling for Semi-Supervised Learning

1 code implementation16 Jan 2020 Paola Cascante-Bonilla, Fuwen Tan, Yanjun Qi, Vicente Ordonez

Pseudo-labeling works by applying pseudo-labels to samples in the unlabeled set by using a model trained on the combination of the labeled samples and any previously pseudo-labeled samples, and iteratively repeating this process in a self-training cycle.

Image Classification

MEDIRL: Predicting the Visual Attention of Drivers via Maximum Entropy Deep Inverse Reinforcement Learning

2 code implementations ICCV 2021 Sonia Baee, Erfan Pakdamanian, Inki Kim, Lu Feng, Vicente Ordonez, Laura Barnes

Inspired by human visual attention, we propose a novel inverse reinforcement learning formulation using Maximum Entropy Deep Inverse Reinforcement Learning (MEDIRL) for predicting the visual attention of drivers in accident-prone situations.

Autonomous Vehicles reinforcement-learning +1

Drill-down: Interactive Retrieval of Complex Scenes using Natural Language Queries

1 code implementation NeurIPS 2019 Fuwen Tan, Paola Cascante-Bonilla, Xiaoxiao Guo, Hui Wu, Song Feng, Vicente Ordonez

We show that using multiple rounds of natural language queries as input can be surprisingly effective to find arbitrarily specific images of complex scenes.

Image Retrieval Natural Language Queries +1

Testing DNN Image Classifiers for Confusion & Bias Errors

1 code implementation20 May 2019 Yuchi Tian, Ziyuan Zhong, Vicente Ordonez, Gail Kaiser, Baishakhi Ray

We found that many of the reported erroneous cases in popular DNN image classifiers occur because the trained models confuse one class with another or show biases towards some classes over others.

Avg DNN Testing +2

Gender Bias in Contextualized Word Embeddings

1 code implementation NAACL 2019 Jieyu Zhao, Tianlu Wang, Mark Yatskar, Ryan Cotterell, Vicente Ordonez, Kai-Wei Chang

In this paper, we quantify, analyze and mitigate gender bias exhibited in ELMo's contextualized word vectors.

Word Embeddings

Chat-crowd: A Dialog-based Platform for Visual Layout Composition

no code implementations NAACL 2019 Paola Cascante-Bonilla, Xuwang Yin, Vicente Ordonez, Song Feng

In this paper we introduce Chat-crowd, an interactive environment for visual layout composition via conversational interactions.

Goal-Oriented Dialog

Balanced Datasets Are Not Enough: Estimating and Mitigating Gender Bias in Deep Image Representations

2 code implementations ICCV 2019 Tianlu Wang, Jieyu Zhao, Mark Yatskar, Kai-Wei Chang, Vicente Ordonez

In this work, we present a framework to measure and mitigate intrinsic biases with respect to protected variables --such as gender-- in visual recognition tasks.

Association Temporal Action Localization

Text2Scene: Generating Compositional Scenes from Textual Descriptions

3 code implementations CVPR 2019 Fuwen Tan, Song Feng, Vicente Ordonez

In this paper, we propose Text2Scene, a model that generates various forms of compositional scene representations from natural language descriptions.

Deep Feature Aggregation and Image Re-ranking with Heat Diffusion for Image Retrieval

1 code implementation22 May 2018 Shanmin Pang, Jin Ma, Jianru Xue, Jihua Zhu, Vicente Ordonez

We show that by considering each deep feature as a heat source, our unsupervised aggregation method is able to avoid over-representation of \emph{bursty} features.

Image Retrieval Re-Ranking +1

Feedback-prop: Convolutional Neural Network Inference under Partial Evidence

1 code implementation CVPR 2018 Tianlu Wang, Kota Yamaguchi, Vicente Ordonez

We propose an inference procedure for deep convolutional neural networks (CNNs) when partial evidence is available.

Where and Who? Automatic Semantic-Aware Person Composition

no code implementations4 Jun 2017 Fuwen Tan, Crispin Bernier, Benjamin Cohen, Vicente Ordonez, Connelly Barnes

Image compositing is a method used to generate realistic yet fake imagery by inserting contents from one image to another.

Commonly Uncommon: Semantic Sparsity in Situation Recognition

2 code implementations CVPR 2017 Mark Yatskar, Vicente Ordonez, Luke Zettlemoyer, Ali Farhadi

Semantic sparsity is a common challenge in structured visual classification problems; when the output space is complex, the vast majority of the possible predictions are rarely, if ever, seen in the training set.

Grounded Situation Recognition Structured Prediction

TreeTalk: Composition and Compression of Trees for Image Descriptions

no code implementations TACL 2014 Polina Kuznetsova, Vicente Ordonez, Tamara L. Berg, Yejin Choi

We present a new tree based approach to composing expressive image descriptions that makes use of naturally occuring web images with captions.

Image Captioning Image Retrieval

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