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전민식 ( Min-sik Jeon ),고봉진 ( Bong-jin Ko ) 한국항행학회 2016 韓國航行學會論文誌 Vol.20 No.5
본 논문에서는 영상처리를 통해 GUI를 기반으로 산업용 디지털 기기의 측정값을 인식하고 기록하는 시스템을 제안하고 구현하였다. 제안한 시스템은 기존의 차량번호판 인식과 달리 산업용 측정기의 LCD화면에 표시되는 값은 디지털 숫자로 표시하고 있어 소수점과 마이너스 표시, LCD보호유리의 반사광등의 여러 가지 장애요인을 고려하였다. LCD화면에 표시된 숫자를 인식하기 위해 블롭 레이블링 (blob-labeling)기법을 사용하였으며, 인식한 숫자 이미지는 템플릿 매칭(template matching)을 통해 숫자가 무엇인지 판별하여, 인식한 측정값을 측정시간과 함께 저장장치에 기록하였다. 본 논문에서 제안한 시스템은 산업현장에서 제품의 내외경이나 높이를 측정하고 기록할 때 수기로 작성하는 번거로움을 줄이고, 수기로 작성 시 잘못 기입하는 경우를 방지함으로써 생산 공정 과정에서 오류가 없는 효율적인 공정관리가 가능하게 하였다. In this paper, we proposed and implemented a GUI-based system to recognize and record measured values of digital instruments in the industrial site through image processing. Unlike the existing vehicle license plate recognition system, the measured values of the measuring instrument are displayed on the LCD screen as digital numbers. So, the proposed system considers the decimal point, a negative sign, light reflected by LCD protective glass, and various disturbance factors. We used blob-labeling technique to recognize the numbers displayed on the LCD screen, the recognized number images were determined as certain numbers through the template matching, and recognized values were recorded in the storage device with measurement time. Therefore, the proposed system in this paper would reduce the burden of writing when recording the measured values of the inside/outside diameter or height of the product in the industrial site, so effective and errorless process management in production process is possible by preventing errors in recording measurements when written by hand.
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영상처리와 확장칼만필터를 이용한 쿼드로터의 동적 물체 추종
김기정(Ki-jung Kim),유호윤(Ho-Yun Yu),이장명(Jangmyung Lee) 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.18 No.1
This paper proposes a new strategy for a quad-rotor to track a moving object efficiently by using image processing and an extended Kalman filter. The goal of path planning for the quad-rotor is to design an optimal path from the start point to the destination point. To lengthen the freight time of the quad-rotor, an optimal path is required to reduce the energy consumption. To track a moving object, the mark signed on the moving object has been detected by a camera mounted first on the quad-rotor. The center coordinates of the mark and its area are calculated through the blob analysis which is one type of image processing. The mark coordinates are utilized to obtain information on the motion direction and the area of the mark is utilized to recognize whether the object moves backward or forward from the camera on the quad-rotor. In addition, an extended Kalman filter has been applied to predict the direction and speed of the dynamically moving object. Through these schemes, it is aimed that the quad-rotor can track the dynamic object efficiently in terms of flight distance and time. Through the two different route freights of the quad-rotor, the performance of the proposed system has been demonstrated.
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영상처리와 확장칼만필터를 이용한 쿼드로터의 동적 물체 추종
김기정,유호윤,이장명,Kim, Ki-jung,Yu, Ho-Yun,Lee, Jangmyung 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.21 No.7
This paper proposes a new strategy for a quad-rotor to track a moving object efficiently by using image processing and an extended Kalman filter. The goal of path planning for the quad-rotor is to design an optimal path from the start point to the destination point. To lengthen the freight time of the quad-rotor, an optimal path is required to reduce the energy consumption. To track a moving object, the mark signed on the moving object has been detected by a camera mounted first on the quad-rotor. The center coordinates of the mark and its area are calculated through the blob analysis which is one type of image processing. The mark coordinates are utilized to obtain information on the motion direction and the area of the mark is utilized to recognize whether the object moves backward or forward from the camera on the quad-rotor. In addition, an extended Kalman filter has been applied to predict the direction and speed of the dynamically moving object. Through these schemes, it is aimed that the quad-rotor can track the dynamic object efficiently in terms of flight distance and time. Through the two different route freights of the quad-rotor, the performance of the proposed system has been demonstrated.
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하종은(Jong-Eun Ha) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.6
In this paper we present a method for the inspection of protrusion of coils along the circumference of a given circle. Perspective distortion makes a circle in a world an ellipse on image. This makes protrusion inspection difficult. Our approach makes this problem simple by adjusting a camera’s image plane to be parallel to the object’s plane. Illumination system uses a back light and coaxial light which enables a robust and simple detection of a reference point for the inspection. First, a center of the circle is found through binarization and blob processing. Inspection area along the circumference of the circle is converted into rectangular image type using polar coordinates. Finally, binarization and blob processing is applied to detect the intrusion of the coil. Experimental results show the feasibility of the presented algorithm.
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