• 한국측량학회지
• /
• 제31권6_2호
• /
• pp.593-599
• /
• 2013

China's Mapping Satellite-1, developed by the China Aerospace Science and Technology Corporation (CASC), was launched in three years ago. The data from Mapping Satellite-1 are able to use for efficient surveying and geometric mapping application field. In this paper, we fuse the panchromatic and multispectral images of Changchun area, which are obtained from the Mapping Satellite-1, the one that is the Chinese first transmission-type three-dimensional mapping satellite. The four traditional image fusion methods, which are HPF, Mod.IHS, Panshar and wavelet transform, were used to approach for effectively fusing Mapping Satellite-1 remote sensing data. Subsequently we assess the results with some commonly used methods, which are known a subjective qualitative evaluation and quantitative statistical analysis approach. Consequently, we found that the wavelet transform remote sensing image fusion is the optimal in the degree of distortion, the ability of performance of details and image information availability among four methods. To further understand the optimal methods to fuse Mapping Satellite-1 images, an additional study is necessary.

• 한국도로학회논문집
• /
• 제18권4호
• /
• pp.47-53
• /
• 2016

PURPOSES : The objective of this study was to evaluate the results of the dynamic immersion test (DIT) through digital image analysis (DIA). METHODS : The asphalt binder retained post DIT was inspected visually by more than three investigators. However, because visual observations can be subjective, depending on the inspector's skills and knowledge, DIA was also performed. The threshold value for the DIA was determined by a mesh analysis, in which the digital image to be analyzed is divided into very small meshes. In addition, the bitumen bond strength (BBS) test was also performed to the compare the visual results with the mechanical values. RESULTS AND CONCLUSIONS : Depending on the materials used, various methods can be used to predict the behavior of retained asphalt. However, the increasing ratio in the trend of retained asphalt shows different behaviors among the evaluation methods. In this study, the results of the visual observations were significantly different from those of the DIA, the mesh analysis, and the BBS tests. Thus, DIA is an appropriate method for evaluating the results of the DIT. However, in order to use this technique in the field, it is necessary to determine a more reasonable threshold value by performing DIA on various materials.

• 항공우주산업기술동향
• /
• 제8권1호
• /
• pp.25-32
• /
• 2010

2006년에 발사된 다목적실용위성 2호는 다목적실용위성 1호에 비해 공간해상도가 43.5배나 향상되어 영상의 활용도가 높아졌다. 이에 위성영상 상용화 지원을 위하여 다목적실용위성 사용자 지원팀(KOCUST; KOMPSAT Customer & User Support Team)을 구성하여 상용화 운영 절차를 정립하고 각 절차에 상응하는 업무를 정의하고 위상영상 상용화 지원시스템을 구축하였다. 현재 영상운영지원팀에서 다양한 수요자에 맞게 지속적으로 위성영상 상용화 지원시스템을 구축 및 개발하고 있다. 본 연구에서는 현재까지 개발된 상용 수요자에 맞는 지원시스템의 구성 및 기능과 이와 관련된 운영업무를 기술하고 향후 개발방향을 논의해보고자 한다.

• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2003년도 춘계학술대회
• /
• pp.764-769
• /
• 2003

The paper introduces a development result for displacement measurement system of multiple moving objects based on image processing technique. The image processing method adopts inertia moment theory for obtaining the centroid of the targets and basic processing algorithms of gray, binary, closing, labeling and etc. To get precise displacement measurement in spite of multiple moving targets, a CCD camera with zoom is used and the position of camera is changed by a pan/tilt system. The fiducial marks on the fixed positions are used as the sensing points for the image processing to recognize the position errors in directions of X -Y coordinates. The precise alignment device is pan /tilt of X - Y type and the pan/tilt is controlled by DC servomotors which are driven by 80c196kc microprocessor based controller. The centers of the fiducial marks are obtained by a inertia moment method. By applying the developed precise position control system for multiple targets, the displacement of multiple moving targets are detected automatically and are stored in the database system in a real time. By using database system and internet, displacement data can be confirmed at a great distance and analyzed. The developed system shows the effectiveness such that it realizes the precision about 0.12mm in the position control of X -Y coordinates.

• 대한공간정보학회지
• /
• 제7권2호
• /
• pp.57-68
• /
• 1999

지형정보의 활용을 위한 기본도 구축은 효율적인 GIS 작업의 성공여부를 좌우할 만큼 매우 중요한 의미를 지니고 있다. 그러므로, 실용적인 기본도 제작을 위해서는 국가지리정보체계와 필지중심토지정보체계를 일원화할 수 있는 지형 및 지적정보의 연계 활용이 이루어져야 한다. 본 연구에서는 1:5,000 항공사진을 이용하여 정사투영 영상지도를 제작하고 map revision을 수행하였다. 그리고 이를 이용하여 기본도를 제작하고 지형 및 지적정보의 중첩정확도를 비교 분석함으로써, 영상지도와 지적정보를 중첩한 통합 데이터베이스의 제공은 물론 정확한 토지현황 파악과 환경 및 도시계획분야에 그 활용 방안을 제시할 수 있었다.

• 한국게임학회 논문지
• /
• 제10권3호
• /
• pp.37-45
• /
• 2010

이 연구에서는 3D 1인칭 슈팅게임의 시각적 요소를 살펴보고, 그 고유한 특징으로 인해 새롭게 구성되는 주체의 문제를 검토하였다. 3D 1인칭 슈팅게임은 현실 세계에서 인간이 갖는 시각 경험을 재매개함으로써 게이머로 하여금 몰입감을 창조한다. 주관적 시점의 구성, 상대적으로 투명한 인터페이스의 설정 등은 3D 1인칭 슈팅게임의 영상이 지니고 있는 특징이라 할 수 있다. 이러한 게임의 시각적 요소를 통해 구성되는 주체는 영화에서 봉합과 같은 장치를 통해 형성되는 주체와 다른 것이며, 게이머는 주관적 시점과 자율적인 영상 구성을 통해 시선의 주체, 행위의 주체이자 서술의 주체가 된다. 그러나 3D 1인칭 슈팅게임에서 게이머는 완전한 의미의 말하는 주체가 아니라 시야의 제한으로 인해 불완전한 수준의 주체에 머무르게 된다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제17권12호
• /
• pp.3364-3382
• /
• 2023

Remote sensing image segmentation plays an important role in realizing intelligent city construction. The current mainstream segmentation networks effectively improve the segmentation effect of remote sensing images by deeply mining the rich texture and semantic features of images. But there are still some problems such as rough results of small target region segmentation and poor edge contour segmentation. To overcome these three challenges, we propose an improved semantic segmentation model, referred to as MRU-Net, which adopts the U-Net architecture as its backbone. Firstly, the convolutional layer is replaced by BasicBlock structure in U-Net network to extract features, then the activation function is replaced to reduce the computational load of model in the network. Secondly, a hybrid multi-scale recognition module is added in the encoder to improve the accuracy of image segmentation of small targets and edge parts. Finally, test on Massachusetts Buildings Dataset and WHU Dataset the experimental results show that compared with the original network the ACC, mIoU and F1 value are improved, and the imposed network shows good robustness and portability in different datasets.

• 한국건설관리학회논문집
• /
• 제23권6호
• /
• pp.54-64
• /
• 2022

국내 건설산업의 지속적인 노령화 및 인력부족 문제는 노동집약적 건설업의 특성과 지속되는 청년층의 건설업계를 향한 부정적 이미지가 증가하는 현실을 감안할 때 더 이상 미래의 문제가 아니라 국내 건설업의 생존을 위해 꼭 해결해야할 선결과제임에 틀림없다. 본 연구는 국내 건설산업이 직면한 건설 인력부족의 근원적인 문제점을 조명하고 인력부족문제를 해결하기 위해 최근 5년간 패스트트랙 성향의 신속한 대응책을 마련하고 있는 영국의 MMC 사례와 약 20년간의 중장기적인 대응방안을 모색하고 있는 싱가포르의 Buildability 사례를 비교분석함으로써 양국이 제시하는 전략적 대응방안의 시사점을 도출하고 유사한 전략을 구사하기 위한 방안을 제안하였다. 그리고 본 연구가 제시한 대응전략을 프로세스 다이어그램으로 제시하여, 향후 전략개발의 방향성을 명확히 하였다.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2004년도 학술대회지
• /
• pp.814-818
• /
• 2004

Off-line handwritten character recognition is in difficulty of incomplete preprocessing because it has not dynamic and timing information besides has various handwriting, extreme overlap of the consonant and vowel and many error image of stroke. Consequently off-line handwritten character recognition needs to study about preprocessing of various methods such as binarization and thinning. This paper considers running time of watershed algorithm and the quality of resulting image as preprocessing For off-line handwritten Korean character recognition. So it proposes application of effective watershed algorithm for segmentation of character region and background region in gray level character image and segmentation function for binarization image and segmentation function for binarization by extracted watershed image. Besides it proposes thinning methods which effectively extracts skeleton through conditional test mask considering running time and quality. of skeleton, estimates efficiency of existing methods and this paper's methods as running time and quality. Watershed image conversion uses prewitt operator for gradient image conversion, extracts local minima considering 8-neighborhood pixel. And methods by using difference of mean value is used in region merging step, Converted watershed image by means of this methods separates effectively character region and background region applying to segmentation function. Average execution time on the previous method was 2.16 second and on this paper method was 1.72 second. We prove that this paper's method removed noise effectively with overlap stroke as compared with the previous method.

• 한국농업기계학회:학술대회논문집
• /
• 한국농업기계학회 2000년도 THE THIRD INTERNATIONAL CONFERENCE ON AGRICULTURAL MACHINERY ENGINEERING. V.II
• /
• pp.318-324
• /
• 2000

Ultrasonic and magnetic resonance imaging systems are used to visualize the interior states of biological objects. These nondestructive methods have many advantages but too much expensive. And they do not give exact color information and may miss some details. If it is allowed to destruct some biological objects to get the interior and exterior information, constructing 3D image from the series of the sliced sectional images gives more useful information with relatively low cost. In this paper, PC based automatic 3D model generator was developed. The system was composed of three modules. One is the object handling and image acquisition module, which feeds and slices objects sequentially and maintains the paraffin cool to be in solid state and captures the sectional image consecutively. The second is the system control and interface module, which controls actuators for feeding, slicing, and image capturing. And the last is the image processing and visualization module, which processes a series of acquired sectional images and generates 3D graphic model. The handling module was composed of the gripper, which grasps and feeds the object and the cutting device, which cuts the object by moving cutting edge forward and backward. Sliced sectional images were acquired and saved in the form of bitmap file. The 3D model was generated to obtain the volumetric information using these 2D sectional image files after being segmented from the background paraffin. Once 3-D model was constructed on the computer, user could manipulate it with various transformation methods such as translation, rotation, scaling including arbitrary sectional view.