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AC-DiT: Adaptive Coordination Diffusion Transformer for Mobile Manipulation

Self-Guided Process Reward Optimization with Redefined Step-wise Advantage for Process Reinforcement Learning

Crafting Hanzi as Narrative Bridges: An AI Co-Creation Workshop for Elderly Migrants

Distributional Soft Actor-Critic with Diffusion Policy

Skywork-Reward-V2: Scaling Preference Data Curation via Human-AI Synergy

Fast AI Model Splitting over Edge Networks

From Sentences to Sequences: Rethinking Languages in Biological Systems

MTCNet: Motion and Topology Consistency Guided Learning for Mitral Valve Segmentation in 4D Ultrasound

Horus: A Protocol for Trustless Delegation Under Uncertainty

Mixture of Reasonings: Teach Large Language Models to Reason with Adaptive Strategies

Benchmarking Generalizable Bimanual Manipulation: RoboTwin Dual-Arm Collaboration Challenge at CVPR 2025 MEIS Workshop

Red Teaming for Generative AI, Report on a Copyright-Focused Exercise Completed in an Academic Medical Center

AirV2X: Unified Air-Ground Vehicle-to-Everything Collaboration

Semantic Structure-Aware Generative Attacks for Enhanced Adversarial Transferability

Aligning Frozen LLMs by Reinforcement Learning: An Iterative Reweight-then-Optimize Approach

Distinguishing Predictive and Generative AI in Regulation

Ain't Nothing But a Survey? Using Large Language Models for Coding German Open-Ended Survey Responses on Survey Motivation

Text-Aware Image Restoration with Diffusion Models

How Good LLM-Generated Password Policies Are?

Towards an Explainable Comparison and Alignment of Feature Embeddings

Gradient-Based Model Fingerprinting for LLM Similarity Detection and Family Classification

Empowering Intelligent Low-altitude Economy with Large AI Model Deployment

Incorporating LLMs for Large-Scale Urban Complex Mobility Simulation

Generating Hypotheses of Dynamic Causal Graphs in Neuroscience: Leveraging Generative Factor Models of Observed Time Series

Traveling Across Languages: Benchmarking Cross-Lingual Consistency in Multimodal LLMs

Threat Modeling for AI: The Case for an Asset-Centric Approach

SoccerDiffusion: Toward Learning End-to-End Humanoid Robot Soccer from Gameplay Recordings

PAD: Phase-Amplitude Decoupling Fusion for Multi-Modal Land Cover Classification

Significativity Indices for Agreement Values

Transferrable Surrogates in Expressive Neural Architecture Search Spaces

Privacy-Preserving Operating Room Workflow Analysis using Digital Twins

Uncertainty-Guided Coarse-to-Fine Tumor Segmentation with Anatomy-Aware Post-Processing

CMD-HAR: Cross-Modal Disentanglement for Wearable Human Activity Recognition

Commander-GPT: Fully Unleashing the Sarcasm Detection Capability of Multi-Modal Large Language Models

Understanding-informed Bias Mitigation for Fair CMR Segmentation

HAPI: A Model for Learning Robot Facial Expressions from Human Preferences

MaizeField3D: A Curated 3D Point Cloud and Procedural Model Dataset of Field-Grown Maize from a Diversity Panel

Illuminant and light direction estimation using Wasserstein distance method

Fundamental Limits of Hierarchical Secure Aggregation with Cyclic User Association

LLM - Powered Prediction of Hyperglycemia and Discovery of Behavioral Treatment Pathways from Wearables and Diet

Interleaved Gibbs Diffusion: Generating Discrete-Continuous Data with Implicit Constraints

EquiTabPFN: A Target-Permutation Equivariant Prior Fitted Networks

Circuit-tuning: A Mechanistic Approach for Identifying Parameter Redundancy and Fine-tuning Neural Networks

EigenLoRAx: Recycling Adapters to Find Principal Subspaces for Resource-Efficient Adaptation and Inference

Learning Traffic Anomalies from Generative Models on Real-Time Observations

Enabling Population-Level Parallelism in Tree-Based Genetic Programming for Comprehensive GPU Acceleration

Parameters vs FLOPs: Scaling Laws for Optimal Sparsity for Mixture-of-Experts Language Models

Quantifying the Importance of Data Alignment in Downstream Model Performance

Quantum-enhanced causal discovery for a small number of samples

On Characterizations for Language Generation: Interplay of Hallucinations, Breadth, and Stability

Token Prepending: A Training-Free Approach for Eliciting Better Sentence Embeddings from LLMs

COEF-VQ: Cost-Efficient Video Quality Understanding through a Cascaded Multimodal LLM Framework

GeMID: Generalizable Models for IoT Device Identification

Next-Token Prediction Task Assumes Optimal Data Ordering for LLM Training in Proof Generation

Is Complex Query Answering Really Complex?

Aerial Vision-and-Language Navigation via Semantic-Topo-Metric Representation Guided LLM Reasoning

Offline Reinforcement Learning for Learning to Dispatch for Job Shop Scheduling

Reconsidering the energy efficiency of spiking neural networks

Exploring the Integration of Large Language Models in Industrial Test Maintenance Processes

Sequence-aware Pre-training for Echocardiography Probe Movement Guidance

Anatomical Foundation Models for Brain MRIs

Learning From Crowdsourced Noisy Labels: A Signal Processing Perspective

Quantifying the Cross-sectoral Intersecting Discrepancies within Multiple Groups Using Latent Class Analysis Towards Fairness

Delving into LLM-assisted writing in biomedical publications through excess vocabulary

Towards a Novel Measure of User Trust in XAI Systems

Avoiding Catastrophe in Online Learning by Asking for Help

Improving the Robustness of Distantly-Supervised Named Entity Recognition via Uncertainty-Aware Teacher Learning and Student-Student Collaborative Learning

Beyond Scale: The Diversity Coefficient as a Data Quality Metric for Variability in Natural Language Data

Kernel Density Bayesian Inverse Reinforcement Learning

Embodied AI Agents: Modeling the World

Mind2Web 2: Evaluating Agentic Search with Agent-as-a-Judge

AI Flow: Perspectives, Scenarios, and Approaches

A framework for Conditional Reasoning in Answer Set Programming

Autoformalization in the Era of Large Language Models: A Survey

Agentic AI Process Observability: Discovering Behavioral Variability

Artificial Intelligence Index Report 2025

MAPS: Advancing Multi-Modal Reasoning in Expert-Level Physical Science

XGeM: A Multi-Prompt Foundation Model for Multimodal Medical Data Generation

Direct Preference Optimization Using Sparse Feature-Level Constraints

Unsupervised Cognition

Urban Region Pre-training and Prompting: A Graph-based Approach

Road Graph Generator: Mapping roads at construction sites from GPS data

Point3R: Streaming 3D Reconstruction with Explicit Spatial Pointer Memory

LiteReality: Graphics-Ready 3D Scene Reconstruction from RGB-D Scans

Answer Matching Outperforms Multiple Choice for Language Model Evaluation

Subtyping in DHOL -- Extended preprint

MOTIF: Modular Thinking via Reinforcement Fine-tuning in LLMs

USAD: An Unsupervised Data Augmentation Spatio-Temporal Attention Diffusion Network

DNN-Based Precoding in RIS-Aided mmWave MIMO Systems With Practical Phase Shift

SynapseRoute: An Auto-Route Switching Framework on Dual-State Large Language Model

Self-Correction Bench: Revealing and Addressing the Self-Correction Blind Spot in LLMs

Multi-agent Auditory Scene Analysis

Fast and Simplex: 2-Simplicial Attention in Triton

Synthesizable by Design: A Retrosynthesis-Guided Framework for Molecular Analog Generation

Linear Attention with Global Context: A Multipole Attention Mechanism for Vision and Physics

Early Signs of Steganographic Capabilities in Frontier LLMs

Meta SecAlign: A Secure Foundation LLM Against Prompt Injection Attacks

FairHuman: Boosting Hand and Face Quality in Human Image Generation with Minimum Potential Delay Fairness in Diffusion Models

APT: Adaptive Personalized Training for Diffusion Models with Limited Data

ASDA: Audio Spectrogram Differential Attention Mechanism for Self-Supervised Representation Learning

HAPI: A Model for Learning Robot Facial Expressions from Human Preferences

Created by

Haebom

Author

Dongsheng Yang, Qianying Liu, Wataru Sato, Takashi Minato, Chaoran Liu, Shin'ya Nishida

Outline

This paper proposes a novel learning-ranking framework to improve the realism and naturalness of robot facial expression generation. Existing manual adjustment methods have limitations in terms of expression delicacy and realism, and this study aims to overcome these limitations by utilizing human preference data. In particular, we use pairwise comparison annotations to collect human preference data, and develop the HAPI (Human Affective Pairwise Impressions) model based on Siamese RankNet to improve facial expression evaluation. Experimental results using Bayesian optimization and an online facial expression survey on a 35-DOF Android platform show that the proposed method generates anger, happiness, and surprise facial expressions much more realistically and socially relatable than existing methods. This confirms that the proposed framework effectively bridges the gap between human preference and model prediction, and matches robot facial expression generation with human emotional responses.

Takeaways, Limitations

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Takeaways:

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A novel approach to generating robot facial expressions that takes human preferences into account

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Improving the accuracy of facial expression evaluation using HAPI model based on Siamese RankNet

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Experimental results using 35-DOF Android platform, successful creation of realistic and natural facial expressions compared to existing methods

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Effective linkage between human emotional responses and robot facial expression generation

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Limitations:

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Currently, only three emotional expressions, Anger, Happiness, and Surprise, have been tested. Expanded research on more diverse emotional expressions is needed.

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Results specific to the 35-DOF Android platform. Generalizability to other robot platforms needs to be verified.

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Considering the cost and time consumption of collecting people's preference data. Research on more efficient data collection methods is needed.

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