Structural and Statistical Feature Extraction Methodology for the Recognition of Handwritten Arabic Words

Amara, Marwa; Zidi, Kamel; Ghédira, Khaled

doi:10.1007/978-3-030-14347-3_56

Cited by 4 publications

(1 citation statement)

References 17 publications

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“…The reason for which features are identified and chosen has a significant impact on the system's overall performance in HAR. To extract features from time series data, previous research used two different techniques: statistical and structural [39]. Both of these are handcrafted approaches for converting raw sensor information into specific predefined attributes or descriptors.…”

Section: Sensor-based Human Activity Recognitionmentioning

confidence: 99%

Deep Convolutional Neural Network with RNNs for Complex Activity Recognition Using Wrist-Worn Wearable Sensor Data

Mekruksavanich

Jitpattanakul

2021

Electronics

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Sensor-based human activity recognition (S-HAR) has become an important and high-impact topic of research within human-centered computing. In the last decade, successful applications of S-HAR have been presented through fruitful academic research and industrial applications, including for healthcare monitoring, smart home controlling, and daily sport tracking. However, the growing requirements of many current applications for recognizing complex human activities (CHA) have begun to attract the attention of the HAR research field when compared with simple human activities (SHA). S-HAR has shown that deep learning (DL), a type of machine learning based on complicated artificial neural networks, has a significant degree of recognition efficiency. Convolutional neural networks (CNNs) and recurrent neural networks (RNNs) are two different types of DL methods that have been successfully applied to the S-HAR challenge in recent years. In this paper, we focused on four RNN-based DL models (LSTMs, BiLSTMs, GRUs, and BiGRUs) that performed complex activity recognition tasks. The efficiency of four hybrid DL models that combine convolutional layers with the efficient RNN-based models was also studied. Experimental studies on the UTwente dataset demonstrated that the suggested hybrid RNN-based models achieved a high level of recognition performance along with a variety of performance indicators, including accuracy, F1-score, and confusion matrix. The experimental results show that the hybrid DL model called CNN-BiGRU outperformed the other DL models with a high accuracy of 98.89% when using only complex activity data. Moreover, the CNN-BiGRU model also achieved the highest recognition performance in other scenarios (99.44% by using only simple activity data and 98.78% with a combination of simple and complex activities).

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Section: Sensor-based Human Activity Recognitionmentioning

confidence: 99%