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2段階検出器とは - AI Glossary

ホーム AI用語集 Computer Vision2段階検出器とは

AI用語集

0-9

1-shot learning 2-stage detector 3D Reconstruction 3D convolution 4D data 5G + AI 6DoF pose estimation 7D representation 8-bit quantization 9-layer network 0-shot learning

A

A/B Testing Accountability Accuracy Acoustic Modeling Activation Functions Active Learning Actor-Critic Methods Actuators AdaDelta AdaGrad Adam Optimizer Adjusted R-Squared Adversarial Attacks Affordance Learning Agent-Based Modeling Agentic AI / Autonomous Agents Agentic AI Frameworks Agglomerative Clustering AGI / Artificial General Intelligence AI Accelerators AI Act (EU)AI Agents AI Alignment AI and Bias AI and Sustainability AI APIs AI Art Generation AI Assistants AI Audit AI Auditing AI Bill of Rights (US Blueprint)AI Containment AI Democratization AI Ethics Boards AI Ethics Guidelines AI Feature Store AI for Climate Change AI Generated Content AI Governance Frameworks AI Guardrails AI Hallucinations AI in Healthcare Ethics AI in Warfare AI Legislation AI Literacy AI Marketplaces AI Model Governance AI Model Hub AI Model Registry AI Model Weights AI Music Generation AI Orchestration AI Policy AI Regulations AI Safety AI Security AI Singularity AI Transparency Report AI Watermarking AI Winter AI Workflow Automation AI-as-a-Service Alan Turing Algorithmic Accountability Algorithmic Bias Mitigation Algorithmic Discrimination Algorithmic Transparency Andrew Ng Anomaly Detection Anomaly Detection in Security Anthropic Apache Kafka API Development API Endpoints Apriori Algorithm Artificial General Intelligence (AGI)Artificial Neural Networks Artificial Superintelligence ASICs Association Rule Learning Asynchronous Advantage Actor-Critic Attention Mechanisms AUC Audio Classification Audio Signal Processing Augmented Reality Authentication Authorization Autoencoders Automated Reasoning Automatic Speech Recognition (ASR)Automation AutoML Autonomous Navigation Autoregressive Models Algorithm Autoencoder Artificial Intelligence (AI)Attention

B

Bag-of-Words Model Bagging Batch Size Bayesian Inference Bayesian Networks Bayesian Optimization BERT Bias in AI Bias-Variance Tradeoff Big Data Big Data Technologies Biometric Security BLEU Score Blockchain in AI Box Plot Byte-Pair Encoding (BPE)Backpropagation Batch Normalization Boosting Bias

C

Caffe Calculus Calibration California Consumer Privacy Act (CCPA)Canary Deployment Capsule Networks Carbon Footprint of AI Case-Based Reasoning Catastrophic Forgetting Central Limit Theorem Chain-of-Thought Chinese Room Argument Class Imbalance Classification Cloud AI Platforms Cloud Computing Clustering Algorithms CNN / Convolutional Neural Network Code Generation Models Cognitive Architectures Cognitive Computing Cohere Colab Notebooks Collaborative Filtering Color Spaces Complex Analysis Compliance Compliance Standards (ISO IEEE)Computational Complexity Computational Fluid Dynamics Computational Theory of Mind Compute-Optimal Models Concept Drift Conceptual Graphs Conditional Probability Confusion Matrix Consciousness in AI Consistency Models Constitutional AI Constraint Satisfaction Problems Containerization Content-Based Filtering Context Window Continual Learning Continuous Integration/Continuous Deployment (CI/CD)Control Systems Conversational AI Convolutional Neural Networks COPPA Coreference Resolution Correlation Correlation Matrix Cost-Sensitive Learning Cross-Entropy Loss Curriculum Learning Cyber Threat Intelligence Cybersecurity Regulations Clustering Cross-Validation Chatbot Classifier / Classification

D

DALL·E Data Annotation Data Catalog Data Centers Data Cleaning Data Drift Data Governance Data Ingestion Data Integration Data Labeling Data Lake Data Lakes Data Leakage Data Lineage Data Mining Data Pipeline Data Poisoning Data Preprocessing Data Privacy Data Protection Data Protection Laws Data Quality Data Security Data Sovereignty Data Transformation Data Versioning Data Visualization Data Visualization Techniques Data Warehousing Databases for AI Davies-Bouldin Index DBSCAN Decision Boundary Visualization Decision Trees Deep Belief Networks Deep Q-Networks Deep Reinforcement Learning Deepfakes Deepfake DeepMind Demis Hassabis Dependency Parsing Depth Estimation Descriptive Statistics Dialogue Systems Differential Equations Differential Evolution Differential Privacy Diffusion Models Digital Divide Digital Provenance Digital Twins Dimensionality Reduction Direct Preference Optimization (DPO)Discourse Analysis Discrete Event Simulation Discrete Mathematics Disinformation Distributed Computing Distributed File Systems Distributed Training Docker Drones Dropout Dropout Regularization Dynamical Systems Deep Learning Data Augmentation Deterministic Model Discriminative Model

E

Early Stopping Edge AI Edge Computing Edge Detection Eigenvalues and Eigenvectors Elon Musk Embedding Size Embeddings Embodied AI Emergent Abilities Emotion Recognition Ensemble Methods Episodic Memory Epoch Ethical AI Ethical AI Guidelines Ethical Auditing Ethical Decision-Making Ethical Dilemmas Ethical Frameworks Ethics of AI ETL Processes Evolutionary Algorithms Existential Risk Expectation-Maximization Expectation-Maximization Algorithm Expected Calibration Error Expert Systems Explainability Exploration vs. Exploitation Exploratory Data Analysis Export Controls Ensemble Learning Encoder Explainable AI (XAI)Embedding

F

F1 Score Facial Recognition Fairness FastAI Feature Engineering Feature Importance Feature Selection Feature Store Feature Stores Federated Learning Fei-Fei Li Few-Shot Learning Finite Element Analysis First-Order Logic Flow Matching Force Control Foundation Model Economy Foundation Models Fourier Transform FPGAs Frame Languages Functional Analysis Fine-tuning Forward Propagation Fusion / Multimodal Fusion Foundation Model Feature Extraction

G

Game Playing AI Game Theory Game Theory Simulations GAN / Generative Adversarial Network Gated Recurrent Units Gaussian Mixture Models General Data Protection Regulation (GDPR)Generative Adversarial Networks Generative Models Genetic Algorithms Gensim Geoffrey Hinton Global Cooperation GPT Models Grad-CAM Gradient Boosting Machines Gradient Clipping Graph Neural Networks Graph Theory Graphics Processing Units (GPUs)Grid Search Grounding Graph Neural Network (GNN)Gradient Descent Generative AI

H

Hadoop Heatmap Help Heuristic Algorithms Hidden Markov Models Hierarchical Reinforcement Learning High-Performance Computing HIPAA Histogram HOG HPC Clusters Hugging Face Hugging Face Transformers Human Rights Human-in-the-Loop Human-Robot Interaction Hyperparameter Optimization Hyperparameter Tuning Hyperparameter Heuristic Hidden Layer Hierarchical Model Hallucination

I

Ilya Sutskever Image Captioning Image Classification Image Recognition Image Segmentation Impact on Employment In-Context Learning Industrial Robots Inference Inference Engines Inference Optimization Inferential Statistics Information Theory Informed Consent Infrastructure as Code Instance Segmentation Instruction tuning Intellectual Property Rights Intelligent Agents Intrusion Detection Systems Inverse Reinforcement Learning Instance / Sample Intelligence Amplification / Augmentation Interpretability Imbalanced Data

J

JAX John McCarthy Joint Probability Distribution JSONL / JSON-lines Juergen Schmidhuber Jupyter Notebooks Jittering Joint Embedding Juxtaposition

K

K-Nearest Neighbors K-Shot Learning K-means Clustering Kai-Fu Lee Kalman Filters Keras KL Divergence (Kullback–Leibler Divergence)Knowledge Cutoff Knowledge Graphs Knowledge Representation Kubernetes Kernel Trick Knowledge Distillation

L

L1 Regularization L2 Regularization Label Smoothing Language Modeling Language Models Laplace Transform Large Language Models (LLMs)Large Multimodal Models Latent Dirichlet Allocation Latent Space Law of Large Numbers Layer Normalization Learning Curve Learning Rate Decay Learning Rate Scheduling Lemmatization LIME Linear Algebra Linear Regression Log Loss Logic Programming Logistic Regression Long Short-Term Memory Networks Long-Context Models LoRA (Low-Rank Adaptation)LSTM / Long Short-Term Memory Learning Rate Latent Variable Loss Function Large Language Model (LLM)

M

Machine Consciousness Machine Translation Markov Chain Models Markov Chain Monte Carlo Markov Decision Processes Markov Models Marvin Minsky Masked Language Models Master Data Management Matplotlib Matrix Decomposition MCP Mean Absolute Error Mean Squared Error Mechanistic Interpretability Mel-Frequency Cepstral Coefficients (MFCCs)Metadata Management Microservices Midjourney Mind Uploading Mini Tool Mini-Batch Gradient Descent Mixture of Experts (MoE)MLOps Mobile Robots Model Cards Model Compression Model Deployment Model Drift Model Explainability Tools Model Monitoring Model Serving Model Stealing Momentum Optimization Monitoring and Logging Monte Carlo Methods Monte Carlo Simulations Moral Machines Motion Detection Motion Planning Multi-Armed Bandit Problem Multimodal AI Music Information Retrieval MXNet Multi-head Attention Multimodal / Multimodality Meta-learning Model Machine Learning (ML)

N

n-Grams Naive Bayes Algorithm Naive Bayes Classifier Named Entity Recognition Natural Language Generation (NLG)Natural Language Processing Natural Language Processing (NLP)Natural Language Understanding Nesterov Accelerated Gradient Network Simulations Neural Architecture Search Neural Networks Neural Processing Unit (NPU)Neuromorphic Computing Nick Bostrom NLP / Natural Language Processing NLTK NLU / Natural Language Understanding Noise Reduction NoSQL Databases NumPy NVIDIA CUDA Neural Network Novelty Detection / Anomaly Detection Normalization

O

Object Detection Object Tracking One-hot Encoding Ontologies OpenAI OpenAI GPT Optical Character Recognition Optimization Theory Out-of-Distribution (OOD) Data Overfitting Optimizer Online Learning Objective Function

P

Pandas Parallel Computing Parameter Count Parameter-Efficient Fine-Tuning (PEFT)Part-of-Speech Tagging Partial Dependence Plots Path Planning Pattern Recognition People also viewed Perception in AI Perceptron Perplexity Peter Norvig Philosophy of Mind Phonetics Pipelines Planning and Scheduling Plotly Policy Gradients Policy Optimization Pooling Pose Estimation Positional Encoding Pragmatics Precision Predictive Modeling Predictive Probability Preference Tuning Principal Component Analysis Privacy Privacy-Preserving Machine Learning Probability Density Functions Probability Theory Problem Solving Process Modeling Process-Based Supervision Prompt Chaining Prompt Engineering Prompt Injection Prompt Marketplace Prompt Templates Propositional Logic Proximal Policy Optimization Pruning PyTorch Parameter Pretraining Prompt Policy / Reinforcement Learning Policy

Q

Q-learning QLoRA (Quantized Low-Rank Adaptation)Quantum Computing Quantum Machine Learning Question Answering Question Answering Systems Queue / Buffer Query Quality Estimation Quantization

R

R-Squared Random Forests Random Search Ray Kurzweil Real Analysis Reasoning Engines Recall Recommender Systems Recurrent Neural Networks Red Teaming Regression Regression Analysis Regulatory Compliance Reinforcement Learning from Human Feedback Reinforcement Learning in Robotics Reproducibility Responsible AI Retrieval-Augmented Generation Reward Function RMSprop RNN / Recurrent Neural Network Robot Kinematics Robot Vision Robotic Manipulation Robotic Operating System (ROS)Robotics Transformers Robustness in AI Models ROC Curve Rodney Brooks Root Mean Squared Error Rule-Based Systems Retrieval Augmented Generation (RAG)Reinforcement Learning (RL)Regularization Representation Learning

S

Saliency Maps SARSA Algorithm Scalable Oversight Scaling Laws Scatter Plot Scikit-Learn SciPy Seaborn Search Algorithms Secure Hardware Secure Multi-Party Computation Secure Protocols Self-Attention Self-Driving Cars Semantic Networks Semantic Parsing Semantic Role Labeling Semantic Segmentation Semantic Web Semi-Supervised Learning Sensors SentencePiece Sentiment Analysis Sequence Labeling Serverless Computing Serverless GPUs Set Theory SHAP Values Siamese Networks SIFT Silhouette Score Simulated Annealing Simulation Hypothesis Simulation-to-Real Transfer (Sim2Real)Simultaneous Localization and Mapping (SLAM)SMOTE Social Acceptance of AI Social Simulation Softmax SOTA (State of the Art)spaCy Spark Speaker Diarization Spectrogram Analysis Speech Enhancement Speech Recognition Speech Synthesis Spiking Neural Networks SQL Stable Diffusion Stacking State-Action Pairs Statistical Analysis Statistical Distributions Statistics Stemming Stochastic Gradient Descent Stochastic Modeling Stochastic Processes Stop Words Stream Processing Strong AI Strong vs. Weak AI Stuart Russell Style Transfer Subword Tokenization Support Vector Machines SURF Surveillance Swarm Intelligence Symbolic AI Synthetic Data Generation Synthetic Media System Dynamics System Prompt Sampling Sequence Modeling Supervised Learning Self-Supervised Learning

T

t-SNE Teacher Forcing Technological Singularity Teleoperation Temperature Temporal Difference Learning Tensor Processing Units (TPUs)TensorFlow Testing and Validation Text Summarization Text-to-Audio Generation Text-to-Image Generation Text-to-Speech (TTS)Text-to-Video Generation TF-IDF Theano Time Series Analysis Timnit Gebru TinyML Token Limit Tokenization Tokens Tool Use (LLMs)Topic Modeling Topology Transformer Models Transformer Networks Transparency Transparency Requirements Trust Region Policy Optimization Trustworthy AI Truthfulness (in LLMs)Turing Test Tuning / Hyperparameter Tuning Tokenizer Transformer Training Data Transfer Learning

U

U-Net UMAP Unmanned Aerial Vehicles (UAVs)Unmanned Ground Vehicles Underfitting Universal Approximation Theorem Unsupervised Learning Uncertainty Estimation

V

Validation Curve Value Function Vector Database Version Control for Models Vibe code an AI Tool Video Generation Models Virtual Reality Simulations Vision Transformer (ViT)Voice Biometrics Voice Cloning Voice Conversion Vector Embedding Validation Set Vanishing / Exploding Gradient Variational Autoencoder (VAE)

W

Warmup Steps Weak AI Weight Decay Word Embeddings Word Sense Disambiguation WordPiece World Models Whitening / Whitening Transformation Workflow Word Embedding Weak Supervision

X

XAI / Explainable AI XLM XLNet XOR problem X-axis / feature axis

Y

Yoga of AI Y-transform / YUV YAGNI (You Aren't Gonna Need It)Yann LeCun Yoshua Bengio Y-axis / feature axis Yield (model yield / throughput)

Z

Z-score Normalization Zero Trust Architecture Zero-shot Learning / Zero-shot inference Zero-gradient phenomenon Zero-centric / Zero-bias initialization Zygosity in augmentation

2段階検出器とは

Computer Vision

[wˌʌt ɪz tˈuːstˈeɪdʒ dɪtˈɛktɚ]

最終更新: 2025年10月15日

2段階検出器は、コンピュータビジョン分野で広く使用されている物体検出手法です。最初の段階で候補領域を生成し、次の段階でこれらの領域を分類および回帰する二段階のアプローチを採用しています。

最も有名な2段階検出器はFaster R-CNNで、自動運転、監視、顔認識などのさまざまなアプリケーションで利用されています。作業フローには、最初の段階で潜在的なバウンディングボックスを生成する領域提案ネットワーク（RPN）が含まれ、次の段階でこれらのボックスが分類されます。

これらの検出器は、高い精度と複雑なシーンを処理する能力で知られており、自動運転車での歩行者や車両のリアルタイム検出に適しています。

ただし、YOLOなどの単一段階検出器と比較して、計算の複雑さが高く、推論速度が遅くなります。将来のトレンドには、これらのモデルの速度を最適化し、Transformerなどの新しいアーキテクチャを統合することが含まれます。

2段階検出器を実装する際は、リソース要件とリアルタイム性能を考慮することが重要であり、特定のアプリケーションに適したモデルとパラメータを選択する必要があります。

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