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후정동,최철영 한국융합학회 2018 한국융합학회논문지 Vol.9 No.7
최근의 VR 기술을 애니메이션 영역에 적용하는 것은 필연적인 추세로 보여진다. 이러한 VR 기술을 기존의 수묵 애니메이션에 활용하면 평면적인 예술 작품이 새로운 서사방식과 시청각 언어를 갖추어 새로운 애니메이션 장르로 갖추게 될 것으로 보인다. 하지만 새로 개발하는 것이 아닌 기존의 평면적인 수묵 이미지를 360도 화면에 배치하기 위해서는 기술적으로 많은 어려움이 존재하는데 기존에 제작된 수묵 애니메이션의 배경 수묵 이미지에서 거리의 깊이에 따른 레이어 추출과 360도 공간에 이들을 깊이에 따른 곡면에 배치를 통해 VR 공간에 깊이감을 부여하는 VR수묵 애니메이션을 제작해 보려 하였다. 본문에서는 기존의 수묵화 이미지에서 원경, 근경 ,중경 레이어를 추출하는 과정에서 발생하는 문제점을 살펴보고 이를 해결하기 위한 접근 방법들을 찾아보고 제시해보려 하였다. Applying VR technology to animation areas is emerging as a trend of recent years. So if you use this VR technology in traditional ink animation, 2D art piece is expected to be equipped with a new narrative style and visual and auditory language, making it a new animation genre. There's a lot of technical difficulties in putting the existing 2D ink image on a 360 degree display. VR ink animation has been created that gives depth to VR space by using layer extraction method based on depth of distance and placing layers extracted on curved surface that is aligned with depth in 360-degree space in the image of ink painting, which is the background of traditional ink animation. In the text, we took an overview on problems generated in extracting layers of distant view, close-range view and middle distant view from the existing image of ink painting and made suggestions of an effective way to approach them.
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사진측량 기술을 기반으로 뚜렷한 특징이 없는 검은 물체의 3D 재건 연구
후정동(Zhengdong Hou),김기홍(Kihong Kim) 한국정보통신학회 2021 한국정보통신학회 여성 ICT 학술대회 논문집 Vol.2021 No.8
촬영 측량 기술의 작동 원리는 컴퓨터로 이미지 속의 동일한 화소점을 인식하는 데 있다. 표면의 특징이 많은 물체일수록 재건된 모형의 정밀도가 높고, 표면의 특징이 비교적 적은 물체들이 재건 과정에 문제가 있을 수 있다. 예를 들면 유리와 같이 넓고 평평한 면적을 가진 검은 물체가 있다. 이 논문은 검은색 수지 재료를 실험 대상으로 삼았다. 디지털 카메라로 캡처 사진을 수정하여 LightRoom을 사용하여 그림자, 질감, 선명도 및 검정의 네 가지 속성을 수정하여 15세트의 실험을 수행한다. 3D 모델의 재건 작업은 Rerality Capture에서 진행한다. 실험 결과를 분석하여 블랙, 텍스처, 선명도의 세 가지 속성을 수정하면 검은색 물체에 대한 사진측량의 3D 모델 재구성의 정확도를 향상시킬 수 있음 알 수 있다. The working principle of photogrammetry technology is to recognize the same pixels in the image through a computer. The more surface features of the object, the higher the accuracy of the model after reconstruction. Some objects with fewer surface features have problems in the reconstruction process, such as glass and surface Objects with large areas of black. In this thesis, the black resin material is used as the experimental object, and 15 sets of experiments are carried out by modifying the photos captured by the digital camera, using the software lightroom to modify the four attributes of shadow, texture, clarity, and blacks. The reconstruction of the 3D model is carried out in Reality Capture. By analyzing the experimental results, it can be found that modifying the three attributes of Blacks, Texture, and Shadow can improve the 3D model reconstruction accuracy of the reconstructed black resin object photogrammetry.
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물체 표면에 광택을 가진 이미지를 활용한 3D 재구성 연구
장가오허,김기홍,후정동,리펑휘 사단법인 한국융합기술연구학회 2023 아시아태평양융합연구교류논문지 Vol.9 No.1
Image-based modeling and rendering technology is characterized by its low cost, high efficiency, and simple operation compared to other modeling methods, but it still has certain limitations. Image-based modeling and rendering techniques, also known as image modeling, are the task of taking tens or hundreds of photographs and then reconstructing a 3D model of a subject with a related software processing system using mathematical methods. However, during the reconstruction process, if a portion of the object is too glossy on the surface, a mirror reflection phenomenon will exist. When a digital camera photographs the surface of a high-gloss object obscured by mirror reflection, the original color and texture information of the digital image is lost, which may result in a deviation in the model in reconstruction operations that image.Thus, addressing the effects of glossiness on information on the surface of objects in digital images in an effective manner has significance in the field of image modeling. This paper studied the principle of image modeling technology. After measuring the glossiness of an object using a gloss meter, a reconstruction experiment was conducted to confirm the effect of the glossiness of the object on the image modeling technology. For image modeling, the data were referenced and various methods of removing gloss information were compared through experiments.We also present a method for restoring and identifying reflected light points (highlights) on the surface of a high-gloss object using the gray scale information of the image. This method can significantly improve the reconstruction effect of high-gloss objects in certain environments, and the results of the experiment show that the reconstructed image after the highlight was restored increased by 14% compared to the pre-restored image.
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Development of Virtual Production Camera Control System based on Arduino
LI PENGHUI,김기홍,이준석,후정동,Zhang Gaohe 사단법인 한국융합기술연구학회 2023 아시아태평양융합연구교류논문지 Vol.9 No.2
Virtual production technology is becoming more mature and is widely used in the production of video content such as movies, drama series, and advertisements. In the two solutions of virtual production (Live LED Wall Cinematography and Live Compositing), the virtual camera and the real camera are required to be identical, that is, after the synchronization of the intrinsic hardware parameters of the real camera and the virtual camera, the exposure parameters of the real camera are changed during shooting, the corresponding parameters of the virtual camera must also be changed to ensure the consistency of the picture. At present, most virtual production studios use camera control systems that are transformed from broadcast camera consoles usually require cumbersome accessories and high prices. During the actual production process, a camera control system using the Arduino development board is found, which inherits the characteristics of easy-to-operate and strong adaptability of the Arduino development board. The serial digital interface camera control protocol provided by Blackmagic Design (BMD SDI CCP), allows the virtual camera (CineCamera) in the virtual production engine Unreal Engine 5 (UE5) and the real camera to communicate in real-time through the use of serial communication. This paper uses literature analysis to explore the necessity and functional requirements of virtual production camera control systems and the feasibility of the virtual production camera system proposed in this study through analysis of academic journals, industry white papers, professional practitioners, and organization presentations. Descript the hardware requirement and design code for the camera control system, verify the feasibility of the system through empirical research, and provide a camera control system that can be customized for individuals or teams who want to make video content through virtual production.
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