Search Results for author: Li Ding

Found 28 papers, 9 papers with code

DALex: Lexicase-like Selection via Diverse Aggregation

1 code implementation23 Jan 2024 Andrew Ni, Li Ding, Lee Spector

Lexicase selection has been shown to provide advantages over other selection algorithms in several areas of evolutionary computation and machine learning.

Program Synthesis Symbolic Regression

Optimizing Neural Networks with Gradient Lexicase Selection

1 code implementation ICLR 2022 Li Ding, Lee Spector

Lexicase selection is an uncompromising method developed in evolutionary computation, which selects models on the basis of sequences of individual training case errors instead of using aggregated metrics such as loss and accuracy.

Image Classification

Objectives Are All You Need: Solving Deceptive Problems Without Explicit Diversity Maintenance

no code implementations4 Nov 2023 Ryan Boldi, Li Ding, Lee Spector

Furthermore, we find that this technique results in competitive performance on the diversity-focused metrics of QD-Score and Coverage, without explicitly optimizing for these things.

Navigate

Ever Evolving Evaluator (EV3): Towards Flexible and Reliable Meta-Optimization for Knowledge Distillation

1 code implementation29 Oct 2023 Li Ding, Masrour Zoghi, Guy Tennenholtz, Maryam Karimzadehgan

We introduce EV3, a novel meta-optimization framework designed to efficiently train scalable machine learning models through an intuitive explore-assess-adapt protocol.

Evolutionary Algorithms Knowledge Distillation +2

Quality Diversity through Human Feedback

1 code implementation18 Oct 2023 Li Ding, Jenny Zhang, Jeff Clune, Lee Spector, Joel Lehman

Meanwhile, Quality Diversity (QD) algorithms excel at identifying diverse and high-quality solutions but often rely on manually crafted diversity metrics.

Image Generation reinforcement-learning +2

CLERA: A Unified Model for Joint Cognitive Load and Eye Region Analysis in the Wild

no code implementations26 Jun 2023 Li Ding, Jack Terwilliger, Aishni Parab, Meng Wang, Lex Fridman, Bruce Mehler, Bryan Reimer

Non-intrusive, real-time analysis of the dynamics of the eye region allows us to monitor humans' visual attention allocation and estimate their mental state during the performance of real-world tasks, which can potentially benefit a wide range of human-computer interaction (HCI) applications.

Blink estimation Keypoint Detection

Particularity

no code implementations12 Jun 2023 Lee Spector, Li Ding, Ryan Boldi

We describe a design principle for adaptive systems under which adaptation is driven by particular challenges that the environment poses, as opposed to average or otherwise aggregated measures of performance over many challenges.

Probabilistic Lexicase Selection

1 code implementation19 May 2023 Li Ding, Edward Pantridge, Lee Spector

Lexicase selection is a widely used parent selection algorithm in genetic programming, known for its success in various task domains such as program synthesis, symbolic regression, and machine learning.

Program Synthesis regression +1

Efficient Halftoning via Deep Reinforcement Learning

no code implementations24 Apr 2023 Haitian Jiang, Dongliang Xiong, Xiaowen Jiang, Li Ding, Liang Chen, Kai Huang

In this paper, we propose a fast and structure-aware halftoning method via a data-driven approach.

reinforcement-learning SSIM

Lexicase Selection at Scale

no code implementations23 Aug 2022 Li Ding, Ryan Boldi, Thomas Helmuth, Lee Spector

Lexicase selection is a semantic-aware parent selection method, which assesses individual test cases in a randomly-shuffled data stream.

Symbolic Regression

Evolutionary Quantum Architecture Search for Parametrized Quantum Circuits

no code implementations23 Aug 2022 Li Ding, Lee Spector

Recent works show that parameterized quantum circuits (PQCs) can be used to solve challenging reinforcement learning (RL) tasks with provable learning advantages.

Reinforcement Learning (RL)

Self-Supervised Visual Place Recognition by Mining Temporal and Feature Neighborhoods

no code implementations19 Aug 2022 Chao Chen, Xinhao Liu, Xuchu Xu, Yiming Li, Li Ding, Ruoyu Wang, Chen Feng

Inspired by noisy label learning, we propose a novel self-supervised framework named \textit{TF-VPR} that uses temporal neighborhoods and learnable feature neighborhoods to discover unknown spatial neighborhoods.

Data Augmentation Representation Learning +1

Halftoning with Multi-Agent Deep Reinforcement Learning

no code implementations23 Jul 2022 Haitian Jiang, Dongliang Xiong, Xiaowen Jiang, Aiguo Yin, Li Ding, Kai Huang

Deep neural networks have recently succeeded in digital halftoning using vanilla convolutional layers with high parallelism.

reinforcement-learning Reinforcement Learning (RL)

Evolving Neural Selection with Adaptive Regularization

no code implementations4 Apr 2022 Li Ding, Lee Spector

We propose the Adaptive Neural Selection (ANS) framework, which evolves to weigh neurons in a layer to form network variants that are suitable to handle different input cases.

Natural Language Understanding

Delving into Deep Image Prior for Adversarial Defense: A Novel Reconstruction-based Defense Framework

no code implementations31 Jul 2021 Li Ding, Yongwei Wang, Xin Ding, Kaiwen Yuan, Ping Wang, Hua Huang, Z. Jane Wang

Deep learning based image classification models are shown vulnerable to adversarial attacks by injecting deliberately crafted noises to clean images.

Adversarial Defense Image Classification +1

Deep Weakly Supervised Positioning

no code implementations10 Apr 2021 Ruoyu Wang, Xuchu Xu, Li Ding, Yang Huang, Chen Feng

PoseNet can map a photo to the position where it is taken, which is appealing in robotics.

Perception Matters: Exploring Imperceptible and Transferable Anti-forensics for GAN-generated Fake Face Imagery Detection

1 code implementation29 Oct 2020 Yongwei Wang, Xin Ding, Li Ding, Rabab Ward, Z. Jane Wang

Specially, when adversaries consider imperceptibility as a constraint, the proposed anti-forensic method can improve the average attack success rate by around 30\% on fake face images over two baseline attacks.

Adversarial Attack Face Detection

Object as Distribution

no code implementations25 Jul 2019 Li Ding, Lex Fridman

We provide qualitative evaluation of this representation for the object detection task and quantitative evaluation of its use in a baseline algorithm for the instance segmentation task.

Autonomous Driving Instance Segmentation +6

A Novel Deep Learning Pipeline for Retinal Vessel Detection in Fluorescein Angiography

no code implementations5 Jul 2019 Li Ding, Mohammad H. Bawany, Ajay E. Kuriyan, Rajeev S. Ramchandran, Charles C. Wykoff, Gaurav Sharma

We propose a novel pipeline to detect retinal vessels in FA images using deep neural networks that reduces the effort required for generating labeled ground truth data by combining two key components: cross-modality transfer and human-in-the-loop learning.

Vessel Detection

Value of Temporal Dynamics Information in Driving Scene Segmentation

no code implementations21 Mar 2019 Li Ding, Jack Terwilliger, Rini Sherony, Bryan Reimer, Lex Fridman

What is not known is how much extra information the temporal dynamics of the visual scene carries that is complimentary to the information available in the individual frames of the video.

Scene Segmentation Segmentation +2

DeepMapping: Unsupervised Map Estimation From Multiple Point Clouds

1 code implementation CVPR 2019 Li Ding, Chen Feng

We propose DeepMapping, a novel registration framework using deep neural networks (DNNs) as auxiliary functions to align multiple point clouds from scratch to a globally consistent frame.

Point Cloud Registration

Weakly-Supervised Action Segmentation with Iterative Soft Boundary Assignment

1 code implementation CVPR 2018 Li Ding, Chenliang Xu

In this work, we address the task of weakly-supervised human action segmentation in long, untrimmed videos.

Action Segmentation

Video Action Segmentation with Hybrid Temporal Networks

no code implementations ICLR 2018 Li Ding, Chenliang Xu

Action segmentation as a milestone towards building automatic systems to understand untrimmed videos has received considerable attention in the recent years.

Action Segmentation Segmentation

TricorNet: A Hybrid Temporal Convolutional and Recurrent Network for Video Action Segmentation

no code implementations22 May 2017 Li Ding, Chenliang Xu

Action segmentation as a milestone towards building automatic systems to understand untrimmed videos has received considerable attention in the recent years.

Action Segmentation Segmentation

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