Table of contents : Preface Contents Editors and Contributors Summary of the Cooking Activity Recognition Challenge 1 Introduction 2 Dataset Description 2.1 Activities Collected 2.2 Experimental Settings and Sensor Modalities 2.3 Data Format 3 Challenge Tasks and Results 3.1 Evaluation Metric 3.2 Results 4 Conclusion References Activity Recognition from Skeleton and Acceleration Data Using CNN and GCN 1 Introduction 2 Related Work 3 Method 3.1 GCN for Micro-Activity Recognition 3.2 CNN for Macro-Activity Recognition 4 Experimental Results 4.1 Dataset 4.2 Data Processing 4.3 Results 5 Conclusions References Let's Not Make It Complicated—Using Only LightGBM and Naive Bayes for Macro- and Micro-Activity Recognition from a Small Dataset 1 Introduction 2 Challenge and Dataset Details 3 Preprocessing and Feature Engineering 4 Classification Model 5 Experimental Results and Discussion 6 Background and Related Works 7 Conclusion References Deep Convolutional Bidirectional LSTM for Complex Activity Recognition with Missing Data 1 Introduction 2 Challenges and Training Pipeline 2.1 Handling Missing Data 2.2 Jitter and Data Augmentation 3 Implemented Deep Learning Architectures 3.1 Convolutional Neural Networks 3.2 LSTM Recurrent Neural Network 3.3 Deep Convolutional Bidirectional LSTM 3.4 Implementation 4 Classification Results 5 Analysis and Discussion 6 Conclusion and Future Work References SCAR-Net: Scalable ConvNet for Activity Recognition with Multimodal Sensor Data 1 Introduction 2 Methodology and Result Analysis 2.1 Contribution 2.2 Macro-Activity Recognition 2.3 Micro-Activity Recognition 3 Conclusion References Multi-sampling Classifiers for the Cooking Activity Recognition Challenge 1 Introduction 2 Related Work 2.1 Learning Subclass Representations for Visually Varied Image Classification 3 Multi-sampling Classifiers 3.1 Multi-classifiers 3.2 Multi-sampling 4 Experimental Results and Discussion 5 Conclusion References Multi-class Multi-label Classification for Cooking Activity Recognition 1 Introduction 2 Related Work 3 Dataset 4 Cooking Activity Recognition Pipeline 5 Results and Discussion 5.1 Macro- and Micro-Activity Recognition Results 5.2 Interpretation of Cooking Activity Features 5.3 Performance with Different Imputation Strategies 5.4 Single-Sensor and Multi-Sensor Feature Performance 6 Limitations and Future Work 7 Conclusions References Cooking Activity Recognition with Convolutional LSTM Using Multi-label Loss Function and Majority Vote 1 Introduction 2 Challenge 2.1 Challenge Goal 2.2 Dataset 2.3 Evaluation Criteria 3 Method 3.1 Preprocessing 3.2 Model 3.3 Loss Function and Optimizer 3.4 Final Prediction Classes Activation 4 Evaluation 4.1 Environment 4.2 Result 5 Conclusion 6 Appendix 6.1 Used Sensor Modalities 6.2 Features Used 6.3 Programming Language and Libraries Used 6.4 Window Size and Post-processing 6.5 Training and Testing Time 6.6 Machine Specification References Identification of Cooking Preparation Using Motion Capture Data: A Submission to the Cooking Activity Recognition Challenge 1 Introduction 1.1 Method Overview 2 Challenge Data 2.1 Data Preprocessing 3 Feature Extraction 4 Classification 4.1 Classifiers 4.2 Post-Processing with a Hidden Markov Model 5 Results 6 Discussion 7 Conclusion 8 Appendix: General Information References Cooking Activity Recognition with Varying Sampling Rates Using Deep Convolutional GRU Framework 1 Introduction 2 Related Works 3 Dataset Description 4 Proposed Methodology 4.1 Preprocessing and Segmentation 4.2 Feature Extraction 4.3 Framework Architecture 5 Results and Discussions 5.1 Macro-Activity Evaluation 5.2 Micro-Activity Evaluation 6 Conclusion References