• Title/Summary/Keyword: 3D restoration

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Label Restoration Using Biquadratic Transformation

  • Le, Huy Phat;Nguyen, Toan Dinh;Lee, Guee-Sang
    • International Journal of Contents
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    • v.6 no.1
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    • pp.6-11
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    • 2010
  • Recently, there has been research to use portable digital camera to recognize objects in natural scene images, including labels or marks on a cylindrical surface. In many cases, text or logo in a label can be distorted by a structural movement of the object on which the label resides. Since the distortion in the label can degrade the performance of object recognition, the label should be rectified or restored from deformations. In this paper, a new method for label detection and restoration in digital images is presented. In the detection phase, the Hough transform is employed to detect two vertical boundaries of the label, and a horizontal edge profile is analyzed to detect upper-side and lower-side boundaries of the label. Then, the biquadratic transformation is used to restore the rectangular shape of the label. The proposed algorithm performs restoration of 3D objects in a 2D space, and it requires neither an auxiliary hardware such as 3D camera to construct 3D models nor a multi-camera to capture objects in different views. Experimental results demonstrate the effectiveness of the proposed method.

A Research on Expandability of Cultural Assets Restoration Blend using Virtual Reality (가상현실을 통한 문화재복원 융합 확장성 연구)

  • Oh, Seung-Hwan
    • Journal of Digital Convergence
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    • v.13 no.8
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    • pp.465-472
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    • 2015
  • The virtual reality technology is currently used classifying functional types such as the observation operation type, the experimental activity type, the learning information type, the field problem-solving type, and other different types, based on the media's characteristics implementing 3D form of multi-sensory information. Using Virtual Reality, the restoration of the 'Doksu Palace' has been grafted onto J. Keller's ARCS model, suggesting a field restoration concept that reenacts the lives of the people that had been in the field with the cultural heritage and history based on a scenario based scene direction. This paper also summarizes 3 different types of implementation of the field restoration assorting multi-scene direction. Certain limitations exist, due to the fact that a completed prototype hasn't been suggested and that a detailed notion of the housing and 3D audio connection has been omitted.

A Study on 3D Virtual Restoration and Convergence Utilization of Gas Masks for Digital Reproduction of War Cultural Heritage (전쟁 문화유산 디지털 재현을 위한 방독면 3D 가상 복원 및 융합 활용 연구)

  • Hyoung-Ki Ahn;Seung-Jun Oh;Ho-Yeon Lee;Young-Guy Lee
    • Journal of Internet of Things and Convergence
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    • v.9 no.1
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    • pp.89-95
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    • 2023
  • In January 2007, the Remains Excavation and Investigation Team of the Ministry of National Defense was established, and full-scale excavation of remains was promoted. Currently, the scope of the excavation is being expanded to Baekma Hill within the DMZ, where fierce battles were fought during the Korean War. Now, many remains and remains are being excavated in Baekma hill. Most are in damaged condition. Therefore, in this study, the original form of the excavated remains was restored using 3D scanning and 3D modeling. This digital restoration method can be an alternative to compensate for the disadvantages of the manual method. Currently, various digital restorations using 3D technology are active in the field of cultural heritage. Digitally restored materials can be used as basic data for digital heritage. Based on this, various contents related to excavation of remains and patriots and veterans can be developed. Furthermore, if digital human restoration is made based on the excavated remains, it will be possible to reproduce the appearance of the dead.

Implementation of Environment Education Software using the Ruins Original Form Restoration Technique (유적원형 복원 기법을 이용한 환경교육용 소프트웨어의 구현)

  • Lee, Gi-Sung;Lee, Keun-Wang
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.12 no.3
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    • pp.1367-1372
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    • 2011
  • This paper designed 3D animation in consideration of human characteristics to stimulate their interest and to be more understandable to them. It was also confirmed that, using the 3D animation contents, general people came to recognize the problem of environment pollution and developed desirable attitude and behavior for protecting the environment. Furthermore, this paper suggested the ruins original form restoration technique of the residential environment and the natural environment of Hanyang in the Joseon Dynasty period using the 3D virtual reality digital recovery techniques.

COMPARISON OF MARGINAL LEAKAGE OF WEDGE-SHAPED CLASS V CAVITY ACCORDING TO RESTORATIVE MATERIALS (쐐기 형태의 5급와동에서 수복재료에 따른 변연 미세누출의 비교)

  • Jang, Hyun-Joo;Lee, Hee-Joo;Hur, Bock
    • Restorative Dentistry and Endodontics
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    • v.25 no.1
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    • pp.56-62
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    • 2000
  • The purpose of this study was to assess the effects of restorative materials on the marginal leakage of wedge-shaped class V cavity. The study was performed in vitro in 25 defect-free permanent, extracted teeth. Wedge-shaped class V cavities were prepared and then the teeth were randomly selected and restored according to the following. Group A : restoration with Tetric Ceram(composite resin) Group B : restoration with Tetric flow(flowable resin) Group C : restoration with Compoglass after acid etching(compomer) Group D : restoration with Compoglass(compomer) Group E : restoration with Fuji II LC improved(resin-modified GIC) After thermocycling, the specimens were immersed in 5% basic fuchsin solution for 6 hours and sectioned longitudinally through the center of the restoration. The degree of marginal leakage was measured as the extent of dye penetration under the stereomicroscope. The data were analysed using one-way ANOVA. When significant differences found, multiple comparisons were made using Duncan's Multiple Range Test. The results were as follows: 1. The occlusal margins of all groups except for Fuji II LC improved showed lesser leakage than gingival margins and there was statistically significant difference(p<0.05). 2. At the occlusal margins, group A, B showed same marginal leakage scores, and others were decreased as group C, D, E in that order. There were statistically significant difference between group A, Band group D, E, group C and group E(p<0.05). 3. At the gingival margins, group B, C showed same marginal leakage scores, and others were decreased as group A, D, E in that order. But there was statistically significant difference between group B, C and group E(p<0.05). 4. In the Compoglass restoration, acid-etching technique was beneficial for marginal sealing ability at all of margins. But there was no statistically significant difference (p>0.05). In the restorations for wedge-shaped class V cavities, resin restoration with acid etching technique is recommended.

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Restoration and Stability of the Glass Sarira Bottle (Treasure No. 1925) from the Sarira Reliquaries Commissioned by Yi Seonggye, Excavated from Geumgangsan Mountain (보물 제1925호 금강산 출토 이성계 발원 사리장 엄구 내 유리제 사리병의 복원 및 안정성 연구)

  • Na, Ahyoung;Hwang, Hyunsung
    • Conservation Science in Museum
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    • v.26
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    • pp.25-34
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    • 2021
  • 3D printing technology has been actively applied for the restoration of cultural properties. However, its application to the restoration of glass cultural properties has not yet been reported and thus requires further study. In this study, 3D printing technology was used to restore a defective part of a glass sarira bottle that forms an element of a series of sarira reliquaries commissioned by Yi Seonggye (known as King Taejo after founding the Joseon Dynasty) that was excavated from Geumgangsan Mountain (designated as Treasure No. 1925) and is currently housed at the National Museum of Korea. The defective area was reproduced using 3D printing and the printed reproduction was reproduced again using an epoxy resin. This latter piece was used as the restoration component rather than the 3D printed element. After the completion of the conservation treatment, the materials used for the 3D printing were compared with transparent materials used to restore ceramics to evaluate their usability and stability. A total of five specimens were produced, including from photocurable resin made by a stereo lithography apparatus (SLA), epoxy resin, acrylic resin, and more. They were exposed to UV for 96 hours to test for yellowing. Of the two specimens made of photocurable resins and exposed to UV, one was sprayed with a UV blocking agent but the other was exposed as-is. The UV exposure test showed that the specimen made by the SLA and sprayed with a UV blocking agent and the specimen made of epoxy resin were stable in terms of yellowing with a change in the b-value was less than 1. They are thus considered to be suitable materials for the restoration of glass cultural properties. Such glass cultural properties are often diverse in shape and their restoration can be difficult as they generally consist of a range of complex parts that hamper restoration. In this regard, diverse materials should be considered when selecting materials for the restoration of glass cultural properties.

3-D Underwater Object Restoration Using Ultrasonic Sensor Fabricated with PZT-Polymer 3-3 Type Composite (PZT-고분자 3-3형 초음파 센서를 이용한 3차원 수중 물체 복원)

  • Cho, Hyun-Chul;Lee, Kee-Seong;Lee, Su-Ho;Kim, Han-Geun;SaGong, Geon
    • Proceedings of the KIEE Conference
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    • 1997.07d
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    • pp.1373-1375
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    • 1997
  • In this study, 3-D underwater object restoration using ultrasonic sensor fabricated with porous PZT-Polymer 3-3 type composite are presented Using the acquired underwater object data $16{\times}16$ pixels, Modified SCL neural networks using the $16{\times}16$ low resolution image was used for underwater object restoration of $32{\times}32$ high resolution image.

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A study on the Restoration of Feature Information in STEPAP224 to Solid model (STEP AP224에 표현된 특징형상 정보의 솔리드 모델 복원에 관한 연구)

  • 김야일;강무진
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.367-372
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    • 2001
  • Feature restoration is that restore feature to 3D solid model using the feature information in STEP AP224. Feature is very important in CAPP, but feature information is defined very complicated in STEP AP224. This paper recommends the algorithm of extraction the feature information in physical STEP AP224file. This program import STEP AP224 file, parse the geometric and topological information, the tolerance data, and feature information line-by-line. After importation and parsing, store data into database. Feature restoration module analyze database including feature information, extract feature information, e.g. feature type, feature's parameter, etc., analyze the relationship and then restore feature to 3D solid model.

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Achievements of Environmental Restoration During Multipurpose Dam Construction - In case of Wheng Seong multipurpose dam - (댐 건설과 환경복원에 대한 우리의 노력 - 강원도 횡성군 횡성다목적댐 환경복원 사례를 중심으로 -)

  • Won, Hi-Young
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.3 no.3
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    • pp.100-104
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    • 2000
  • We have put considerable time and work to find a proper solution to restore the damaged natural environment due to Dam construction, and to restore the field around Dam on the basis of Environmentally Sound Sustainable Development(E.S.S.D). We've replaced the site which had been used as a equipment space with the natural-oriented park, have made a wildlife corridor for those animals which have been living in the area in a newly constructed road to in an out, and have introduced a streamside plant to organize green-space. We've received incredible favor from visitors and residents for the environment restoration. The natural-oriented park plays a role of giving the citizens to the pleasure and the comfort.

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Speckle Noise Reduction for 3D Power Doppler Ventricle Image Restoration Using Wavelet Packet Transform

  • Jung, Eun-sug;Ryu, Conan K.R.;Hur, Chang Wu;Sun, Mingui
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2009.05a
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    • pp.156-159
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    • 2009
  • Speckle noise reduction for 3D power doppler ventricle coherent image for restoration and enhancement using wavelet packet transform with separated thresholding is presented. Wavelet Packet Transform divide into low frequency component image to high frequency component image to be multi-resolved. speckle noise is located on high frequency component in multiresolution image mainly. A ventricle image is transformed and inversed with separated threshold function from low to high resolved images for restoration to be utilize visualization for ventricle diagnosis. The experimental result shows that the proposed method has better performance in comparison with the conventional method.

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