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Vol. 32, No. 8(2), S&M2292

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Sensors and Materials
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Sensors and Materials, Volume 33, Number 8(4) (2021)
Copyright(C) MYU K.K.
pp. 2911-2924
S&M2664 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2021.3301
Published: August 31, 2021

Integrated Image Sensor and Hyperparameter Optimization of Convolutional Neural Network for Facial Skin Detection [PDF]

Hsueh-Yi Lin, Cheng-Jian Lin, Shiou-Yun Jeng, and Cheng-Yi Yu

(Received January 20, 2021; Accepted May 10, 2021)

Keywords: skin detection, convolutional neural network, cosmetology, Taguchi method, orthogonal array, hyperparameter optimization

Detection of the facial skin condition enables people to better understand skin problems and helps them select appropriate treatment methods and maintenance products. We collected facial images of different skin problems by using an image optical sensor. To overcome the problem of insufficient training data, the collected dataset was expanded through data augmentation. In the field of computer vision, deep learning is often used for solving image recognition problems with high accuracy. Therefore, we used a convolutional neural network (CNN) to detect facial images of different skin problems. To overcome the difficulty of parameter selection and increase the recognition rate and robustness of the CNN, the parameters of the CNN were optimized using the Taguchi method. Eight control factors in the convolutional layer and the L36 orthogonal array (OA) were used in experiments. Analysis of variance was used for statistical analysis in the design of the experiments to obtain the optimal parameter combination for the developed CNNs. The experimental results indicate that the CNN optimized using the Taguchi method had an accuracy of 86.95%. The accuracy of the optimized CNN was 7.24% higher than that of the original CNN. The experimental results prove that the proposed hyperparameter optimization method can effectively improve the accuracy of network detection.

Corresponding author: Cheng-Jian Lin


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Cite this article
Hsueh-Yi Lin, Cheng-Jian Lin, Shiou-Yun Jeng, and Cheng-Yi Yu, Integrated Image Sensor and Hyperparameter Optimization of Convolutional Neural Network for Facial Skin Detection, Sens. Mater., Vol. 33, No. 8, 2021, p. 2911-2924.



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