Korean Journal of Artificial Intelligence, KODISA Foundation

PDF Citaion A Study on Improving License Plate Recognition Performance Using Super-Resolution Techniques

Kyeongseok JANG(Kwangwoon University) ; Kwangchul SON(Kwangwoon University) pp.1-7 https://doi.org/10.24225/kjai.2024.12.3.1

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Abstract

In this paper, we propose an innovative super-resolution technique to address the issue of reduced accuracy in license plate recognition caused by low-resolution images. Conventional vehicle license plate recognition systems have relied on images obtained from fixed surveillance cameras for traffic detection to perform vehicle detection, tracking, and license plate recognition. However, during this process, image quality degradation occurred due to the physical distance between the camera and the vehicle, vehicle movement, and external environmental factors such as weather and lighting conditions. In particular, the acquisition of low-resolution images due to camera performance limitations has been a major cause of significantly reduced accuracy in license plate recognition. To solve this problem, we propose a Single Image Super-Resolution (SISR) model with a parallel structure that combines Multi-Scale and Attention Mechanism. This model is capable of effectively extracting features at various scales and focusing on important areas. Specifically, it generates feature maps of various sizes through a multi-branch structure and emphasizes the key features of license plates using an Attention Mechanism. Experimental results show that the proposed model demonstrates significantly improved recognition accuracy compared to existing vehicle license plate super-resolution methods using Bicubic Interpolation.

PDF Citaion AR Marker Detection Technique-Based Autonomous Attitude Control for a nonGPS Aided Quadcopter

Yeonwoo LEE(Mokpo National University) ; KANG Sun-Kyung(Wonkwang University) pp.9-15 https://doi.org/10.24225/kjai.2024.12.3.9

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Abstract

This paper addresses the critical need for quadcopters in GPS-denied indoor environments by proposing a novel attitude control mechanism that enables autonomous navigation without external guidance. Utilizing AR marker detection integrated with a dual PID controller algorithm, this system ensures accurate maneuvering and positioning of the quadcopter by compensating for the absence of GPS, a common limitation in indoor settings. This capability is paramount in environments where traditional navigation aids are ineffective, necessitating the use of quadcopters equipped with advanced sensors and control systems. The actual position and location of the quadcopter is achieved by AR marker detection technique with the image processing system. Moreover, in order to enhance the reliability of the attitude PID control, the dual closed loop control feedback PID control with dual update periods is suggested. With AR marker detection technique and autonomous attitude control, the proposed quadcopter system decreases the need of additional sensor and manual manipulation. The experimental results are demonstrated that the quadrotor’s autonomous attitude control and operation with the dual closed loop control feedback PID controller with hierarchical (inner-loop and outer-loop) command update period is successfully performed under the non-GPS aided indoor environment and it enhanced the reliability of the attitude and the position PID controllers within 17 seconds. Therefore, it is concluded that the proposed attitude control mechanism is very suitable to GPS-denied indoor environments, which enables a quadcopter to autonomously navigate and hover without external guidance or control.

PDF Citaion A Study on the Development of LDA Algorithm-Based Financial Technology Roadmap Using Patent Data

Koopo KWON(Youngsan University) ; Kyounghak LEE(Kwangwoon University) pp.17-24 https://doi.org/10.24225/kjai.2024.12.3.17

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Abstract

A Study on the Development of LDA Algorithm-Based Financial Technology Roadmap Using Patent Data

PDF Citaion A Study on the Development of a Chatbot Using Generative AI to Provide Diets for Diabetic Patients

Ha-eun LEE(Eulji University) ; Jun Woo CHOI(Eulji University) ; Sung Lyul PARK(LG Uplus Corporation) ; Minsoo KANG(Eulji University) pp.25-31 https://doi.org/10.24225/kjai.2024.12.3.25

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Abstract

A Study on the Development of a Chatbot Using Generative AI to Provide Diets for Diabetic Patients

PDF Citaion A Study on the Performance Improvement of MLP Model for Kodály Hand Sign Scale Recognition

Na Gyeom YANG(Eulji University) ; Dong Kun CHUNG(Eulji University) pp.33-39 https://doi.org/10.24225/kjai.2024.12.3.33

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Abstract

In this paper, we explore the application of Kodály hand signs in enhancing children’s music education, performances, and auditory assistance technologies. This research focuses on improving the recognition rate of Multilayer Perceptron (MLP) models in identifying Kodály hand sign scales through the integration of Artificial Neural Networks (ANN). We developed an enhanced MLP model by augmenting it with additional parameters and optimizing the number of hidden layers, aiming to substantially increase the model’s accuracy and efficiency. The augmented model demonstrated a significant improvement in recognizing complex hand sign sequences, achieving a higher accuracy compared to previous methods. These advancements suggest that our approach can greatly benefit music education and the development of auditory assistance technologies by providing more reliable and precise recognition of Kodály hand signs. This study confirms the potential of parameter augmentation and hidden layers optimization in refining the capabilities of neural network models for practical applications.

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