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Compact Spatial Pyramid Pooling Deep Convolutional Neural Network Based Hand Gestures Decoder

Authors
Ashiquzzaman, AkmLee, HyunminKim, KwangkiKim, Hye-YoungPark, JaehyungKim, Jinsul
Issue Date
Nov-2020
Publisher
MDPI
Keywords
deep learning; convolutional neural network; hand gesture recognition; neural network pruning; optimization
Citation
APPLIED SCIENCES-BASEL, v.10, no.21, pp.1 - 22
Journal Title
APPLIED SCIENCES-BASEL
Volume
10
Number
21
Start Page
1
End Page
22
URI
https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/11485
DOI
10.3390/app10217898
ISSN
2076-3417
Abstract
Current deep learning convolutional neural network (DCNN) -based hand gesture detectors with acute precision demand incredibly high-performance computing power. Although DCNN-based detectors are capable of accurate classification, the sheer computing power needed for this form of classification makes it very difficult to run with lower computational power in remote environments. Moreover, classical DCNN architectures have a fixed number of input dimensions, which forces preprocessing, thus making it impractical for real-world applications. In this research, a practical DCNN with an optimized architecture is proposed with DCNN filter/node pruning, and spatial pyramid pooling (SPP) is introduced in order to make the model input dimension-invariant. This compact SPP-DCNN module uses 65% fewer parameters than traditional classifiers and operates almost 3x faster than classical models. Moreover, the new improved proposed algorithm, which decodes gestures or sign language finger-spelling from videos, gave a benchmark highest accuracy with the fastest processing speed. This proposed method paves the way for various practical and applied hand gesture input-based human-computer interaction (HCI) applications.
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