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Jae Sung Park

21 accepted papers

2026

Molmo2: Open Weights and Data for Vision-Language Models with Video Understanding and Grounding

CVPR 2026

Today's strongest video-language models (VLMs) remain proprietary, and the strongest open-weight models often rely on synthetic data from proprietary VLMs and do not disclose their training data or recipe. As a result, the open-source community lacks the foundations needed to improve on the state-of

Cited by 0SourcecodeScholar
2026

Synthetic Object Compositions for Scalable and Accurate Learning in Detection, Segmentation, and Grounding

CVPR 2026

Visual grouping--operationalized through tasks such as instance segmentation, visual grounding, and object detection--enables applications ranging from robotic perception to photo editing. These fundamental problems in computer vision are powered by large-scale, painstakingly annotated datasets. Des

Cited by 0SourceScholar
2026

VideoNet: A Large-Scale Dataset for Domain-Specific Action Recognition

CVPR 2026

Videos are unique in their ability to capture actions which transcend multiple frames. Accordingly, action recognition has long been a quintessential task for video models. Unfortunately, due to a lack of sufficiently diverse and challenging data, modern vision-language models (VLMs) are no longer e

Cited by 0SourceScholar
2025

CertainlyUncertain: A Benchmark and Metric for Multimodal Epistemic and Aleatoric Awareness

ICLR 2025poster

The ability to acknowledge the inevitable uncertainty in their knowledge and reasoning is a prerequisite for AI systems to be truly truthful and reliable. In this paper, we present a taxonomy of uncertainty specific to vision-language AI systems, distinguishing between epistemic uncertainty (arising…

Cited by 1SourcePDFScholar
2025

Molmo and PixMo: Open Weights and Open Data for State-of-the-Art Vision-Language Models

CVPR 2025award

Today's most advanced vision-language models (VLMs) remain proprietary. The strongest open-weight models rely heavily on synthetic data from proprietary VLMs to achieve good performance, effectively distilling these closed VLMs into open ones. As a result, the community has been missing foundational…

2024

ActionAtlas: A VideoQA Benchmark for Domain-specialized Action Recognition

NeurIPS 2024poster

Our world is full of varied actions and moves in specialized fields that we, as humans, seek to identify and learn about. To evaluate the effectiveness of multi-modal models in helping us recognize such fine-grained actions, we introduce ActionAtlas, a video question answering (VideoQA) benchmark on…

Cited by 1SourcePDFScholar
2024

Superposed Decoding: Multiple Generations from a Single Autoregressive Inference Pass

NeurIPS 2024poster

Many applications today provide users with multiple auto-complete drafts as they type, including GitHub's code completion, Gmail's smart compose, and Apple's messaging auto-suggestions. Under the hood, language models support this by running an autoregressive inference pass to provide a draft. Conse…

2023

Fusing Pre-Trained Language Models With Multimodal Prompts Through Reinforcement Learning

CVPR 2023poster

Language models are capable of commonsense reasoning: while domain-specific models can learn from explicit knowledge (e.g. commonsense graphs [6], ethical norms [25]), and larger models like GPT-3 manifest broad commonsense reasoning capacity. Can their knowledge be extended to multimodal inputs suc…

2023

Localized Symbolic Knowledge Distillation for Visual Commonsense Models

NeurIPS 2023poster

Instruction following vision-language (VL) models offer a flexible interface that supports a broad range of multimodal tasks in a zero-shot fashion. However, interfaces that operate on full images do not directly enable the user to “point to" and access specific regions within images. This capabilit…

Cited by 13SourcePDFScholar
2022

Exposing the Limits of Video-Text Models through Contrast Sets

NAACL 2022long

Recent video-text models can retrieve relevant videos based on text with a high accuracy, but to what extent do they comprehend the semantics of the text? Can they discriminate between similar entities and actions? To answer this, we propose an evaluation framework that probes video-text models with…

2022

The Abduction of Sherlock Holmes: A Dataset for Visual Abductive Reasoning

ECCV 2022poster

"Humans have remarkable capacity to reason abductively and hypothesize about what lies beyond the literal content of an image. By identifying concrete visual clues scattered throughout a scene, we almost can’t help but draw probable inferences beyond the literal scene based on our everyday experienc…

Cited by 53SourcePDFScholar
2021

LLC: Accurate, Multi-purpose Learnt Low-dimensional Binary Codes

NeurIPS 2021poster

Learning binary representations of instances and classes is a classical problem with several high potential applications. In modern settings, the compression of high-dimensional neural representations to low-dimensional binary codes is a challenging task and often require large bit-codes to be accur…

2021

MERLOT: Multimodal Neural Script Knowledge Models

NeurIPS 2021oral

As humans, we understand events in the visual world contextually, performing multimodal reasoning across time to make inferences about the past, present, and future. We introduce MERLOT, a model that learns multimodal script knowledge by watching millions of YouTube videos with transcribed speech --…

Cited by 423SourcePDFScholar
2020

VisualCOMET: Reasoning about the Dynamic Context of a Still Image

ECCV 2020poster

Even from a single frame of a still image, people can reason about the dynamic story of the image before, after, and beyond the frame. For example, given an image of a man struggling to stay afloat in water, we can reason that the man fell into the water sometime in the past, the intent of that man…

Cited by 141SourcePDFScholar
2019

Adversarial Inference for Multi-Sentence Video Description

CVPR 2019oral

While significant progress has been made in the image captioning task, video description is still in its infancy due to the complex nature of video data. Generating multi-sentence descriptions for long videos is even more challenging. Among the main issues are the fluency and coherence of the genera…

Cited by 115PDFcodeScholar
2019

Efficient Generation of Motion Plans from Attribute-Based Natural Language Instructions Using Dynamic Constraint Mapping

ICRA 2019poster

We present an algorithm for combining natural language processing (NLP) and fast robot motion planning to automatically generate robot movements. Our formulation uses a novel concept called Dynamic Constraint Mapping to transform complex, attribute-based natural language instructions into appropriat…

Cited by 10SourceScholar
2017

Intention-Aware Motion Planning Using Learning Based Human Motion Prediction

RSS 2017poster

We present a motion planning algorithm to compute collision-free and smooth trajectories for high-DOF robots interacting with humans in a shared workspace. Our approach uses offline learning of human actions along with temporal coherence to predict the human actions. Our intention-aware online plan…

Cited by 0SourcePDFScholar