• Title/Summary/Keyword: 3D방송

Search Result 1,332, Processing Time 0.026 seconds

Comparative Analysis of 3D Tools Suitable for the Rotoscoping Cell Animation Production Process

  • Choi, Chul Young
    • International Journal of Internet, Broadcasting and Communication
    • /
    • v.16 no.3
    • /
    • pp.113-120
    • /
    • 2024
  • Recently, case presentations using AI functions such as ChatGPT are increasing in many industrial fields. As AI-based results emerge even in the areas of images and videos, traditional animation production tools are in need of significant changes. Unreal Engine is the tool that adapts most quickly to these changes, proposing a new animation production workflow by integrating tools such as Metahuman and Marvelous Designer. Working with realistic metahumans allows for the production of realistic and natural movements, such as those captured through motion capture data. Implementing this approach presents many challenges for production tools that adhere to traditional methods. In this study, we investigated the differences between the cell animation workflow and the computer graphics animation production workflow. We compared and analyzed whether these differences could be reduced by creating sample movements using character rigs in Maya and Cascadeur tools. Our results showed that a similar cell animation workflow could be constructed using the Cascadeur tool. To improve the accuracy of our conclusions, we created large, action-packed short animations to demonstrate and validate our findings.

Segregation Mode of Plant Height in Crosses of Rice Cultivars Ⅸ. Crosses between Semi-dwarf Japonicas and Semi-dwarf(d-t) gene Testers (수도 품종간 교잡에 있어서 간장의 유전분리 Ⅸ. 단간 Japonica 품종과 Semi-dwarf (d-t) gene 검정친과의 조합)

  • Kim, Yong-Kwon;Kim, Hong-Yeol;Nam, Yeong-Woo;Park, Sun-Zik;Heu, Mun-Hue
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.30 no.4
    • /
    • pp.449-454
    • /
    • 1985
  • In order to search for the semi-dwarf japonica varieties allelic to the semi-dwarf rice cultivar which is controlled by d-t gene, seven dwarf japonica varieties. Reimei, Hoyoku. Shiranui, Kokumasari, M 7. S.224 and S.295 were crossed to the semi-dwarf cultivar, wx 817. wx 817 is known to have semi-dwarf gene d-t. Their F$_1$, F$_2$ and F$_3$ were grown in 1984 and 1985 and culm lengths were measured at harvest. The results are summarized as follows. 1. The F$_2$s of all 7 cross combinations showed normal distribution and no segregation. 2. The range of culm length variation in the F$_3$ was variable depending on the cross combination, but the general pattern was similar in the all 7 crosses. 3. The mean of F$_3$ and parental F$_2$ mean which were selected into short, medium and tall groups were similar and showed no segregation, implying the selection efficiency in F$_2$. 4. From the results of F$_2$ and F$_3$ segregations, it is concluded that the culm length of the 7 semi-dwarf japonicas tested here are controlled by the same major gene d-t although they are modified by different minor genes.

  • PDF

Design of a Tilted Beam Microstrip Patch Array Antenna using Parasitic Patch Coupling Characteristics (기생 패치의 결합 특성을 이용한 빔 틸팅 마이크로스트립 패치 배열 안테나 설계)

  • 하재권;박동철
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.14 no.2
    • /
    • pp.202-208
    • /
    • 2003
  • In this paper, we proposed a microstrip patch array antenna for DBS reception which had high gain and high tilted angle through mutual coupling driver patch to parasitic patch in H-plane edge and broadside direction in different layers. It was designed and fabricated in 16$\times$8 array by using low cost polyester based copper-clad laminate and foam instead of high cost dielectric substrate. It had gain of 22.9 dBi, beamwidth of 4.6$^{\circ}$, and tilted angle from broadside direction of 43.9$^{\circ}$.

A Study on Arrangement and Configuration of Acoustic Output Equipment according to Type of Church Broadcast Sources (교회 방송음원의 종류에 따른 음향출력 설비 구성 배치에 관한 연구)

  • Park, Eunjin;Lee, Seonhee
    • Journal of Satellite, Information and Communications
    • /
    • v.11 no.3
    • /
    • pp.80-85
    • /
    • 2016
  • In this paper, by comparatively analyzing horn type speaker and line array type speaker developed based on line sound source theory and point sound source theory, we research whether theory is adaptable or not in real. Academically, point sound source is attenuated as much as 6dB in accordance with double distance and line sound source is attenuated as much as 3dB in accordance with double distance. Line array speaker system developed based on line sound source is analyzed by theory of line sound source about occurring small sound pressure attenuation and it is propose of research that array composition of right speaker is selected in accordance with use purpose and environment. For this purpose, we analyze theory of point sound source and line sound source. we analyze parameter value by simulating designed horn type speaker and line array speaker based on theory.

A Study on Depth Information Acquisition Improved by Gradual Pixel Bundling Method at TOF Image Sensor

  • Kwon, Soon Chul;Chae, Ho Byung;Lee, Sung Jin;Son, Kwang Chul;Lee, Seung Hyun
    • International Journal of Internet, Broadcasting and Communication
    • /
    • v.7 no.1
    • /
    • pp.15-19
    • /
    • 2015
  • The depth information of an image is used in a variety of applications including 2D/3D conversion, multi-view extraction, modeling, depth keying, etc. There are various methods to acquire depth information, such as the method to use a stereo camera, the method to use the depth camera of flight time (TOF) method, the method to use 3D modeling software, the method to use 3D scanner and the method to use a structured light just like Microsoft's Kinect. In particular, the depth camera of TOF method measures the distance using infrared light, whereas TOF sensor depends on the sensitivity of optical light of an image sensor (CCD/CMOS). Thus, it is mandatory for the existing image sensors to get an infrared light image by bundling several pixels; these requirements generate a phenomenon to reduce the resolution of an image. This thesis proposed a measure to acquire a high-resolution image through gradual area movement while acquiring a low-resolution image through pixel bundling method. From this measure, one can obtain an effect of acquiring image information in which illumination intensity (lux) and resolution were improved without increasing the performance of an image sensor since the image resolution is not improved as resolving a low-illumination intensity (lux) in accordance with the gradual pixel bundling algorithm.

The Pattern Improvement of Leaky-wave Slot Array Antenna for Satellite Communications (위성통신용 슬롯배열 누설파 안테나의 패턴 개선)

  • Lim, Gye-Jae;Park, Jong-Seo
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
    • /
    • v.2 no.2
    • /
    • pp.69-77
    • /
    • 2009
  • Small size and low profile antenna for mobile vehicular-top-mounted is needed in satellite communication services such as DBS, Satellite Internet and VSAT. In middle latitudes, the development of an array antenna which has the conformal, low profile and 45 degree beam tilted configuration, and has the high gain with sharp beamwidth, low sidelobe and low loss is required for Ka band satellite communication. In this paper, in order to meet with these performances, an array antenna consisting of the vertical polarized waveguide longitudinal slots based on the leaky-wave mode of traveling wave antenna is proposed. Especially, for the lower sidelobe level the radiation power control using a design method of the different slot width is proposed. An array antenna consisting of 32 leakywave elements is showing 34.4 dBi of gain, 3.6 degree of beamwidth, below than -25 dB of sidelobe level, 43 degree of beam tilt angle in center frequency 20.0 GHz. Feed network designed by waveguide cooperated feed shows good performance of wideband and low loss.

  • PDF

A Progressive Rendering Method to Enhance the Resolution of Point Cloud Contents (포인트 클라우드 콘텐츠 해상도 향상을 위한 점진적 렌더링 방법)

  • Lee, Heejea;Yun, Junyoung;Kim, Jongwook;Kim, Chanhee;Park, Jong-Il
    • Journal of Broadcast Engineering
    • /
    • v.26 no.3
    • /
    • pp.258-268
    • /
    • 2021
  • Point cloud content is immersive content that represents real-world objects with three-dimensional (3D) points. In the process of acquiring point cloud data or encoding and decoding point cloud data, the resolution of point cloud content could be degraded. In this paper, we propose a method of progressively enhancing the resolution of sequential point cloud contents through inter-frame registration. To register a point cloud, the iterative closest point (ICP) algorithm is commonly used. Existing ICP algorithms can transform rigid bodies, but there is a disadvantage that transformation is not possible for non-rigid bodies having motion vectors in different directions locally, such as point cloud content. We overcome the limitations of the existing ICP-based method by registering regions with motion vectors in different directions locally between the point cloud content of the current frame and the previous frame. In this manner, the resolution of the point cloud content with geometric movement is enhanced through the process of registering points between frames. We provide four different point cloud content that has been enhanced with our method in the experiment.

Fast Algorithm for Disparity Estimation in ATSC-M/H based Hybrid 3DTV (ATSC-M/H 기반의 융합형 3DTV를 위한 양안시차 고속 추정 알고리즘)

  • Lee, Dong-Hee;Kim, Sung-Hoon;Lee, Jooyoung;Kang, Dongwook;Jung, Kyeong-Hoon
    • Journal of Broadcast Engineering
    • /
    • v.19 no.4
    • /
    • pp.521-532
    • /
    • 2014
  • ATSC-M/H based hybrid 3DTV, which is one of the service compatible 3DTV system, has considerable quality gap between the left and right views. And CRA(Conditional Replenishment Algorithm) has been proposed to deal with the issue of resolution mismatch and improve the visual quality. In CRA, the disparity vectors of stereoscopic images are estimated. The disparity compensated left view and simply enlarged right view are compared and conditionally selected for generating the enhanced right view. In order to implement CRA, a fast algorithm is strongly required because the disparity vectors need to be obtained at every layer and the complexity of CRA is quite high. In this paper, we adopted SDSP(Small Diamond Search Pattern) instead of full search and predicted the initial position of search pattern by examining the spatio-temporal correlation of disparity vectors and also suggested the SKIP mode to limit the number of processing units. The computer simulation showed that the proposed fast algorithm could greatly reduce the processing time while minimizing the quality degradation of reconstructed right view.

Implementation of Integrated Player System based on Free-Viewpoint Video Service according to User Selection (사용자 선택에 따른 자유 시점 비디오 서비스 기반의 통합 플레이어 시스템 구현)

  • Yang, Ji-hee;Song, Min-ki;Park, Gooman
    • Journal of Broadcast Engineering
    • /
    • v.25 no.2
    • /
    • pp.265-274
    • /
    • 2020
  • Free-viewpoint video service is a technology that allows users to watch at any angle, location and distance through interaction. In this paper, the free-viewpoint video services are defined in four viewing modes: Inward view, outward view, 3D object view and first person view. And we developed and implemented a new integrated program that plays all the suggested views. In the contents of girl band performances and basketball games, multi-view cameras suitable for each viewing mode are installed to acquire media, and data stored on the server is streamed over the network, making it available for viewing. Users can freely choose four viewing modes, space location, angle and so on, and the media data such as images and sounds are provided to them by rendering appropriately for the selected the viewpoint. Our system is expected to be a scalable free-viewpoint video service player as well as provide users with immersion and presence by combining various viewing modes.

Study on HTS Antenna Array with Circularly Polarization for DBS Receiver (직접 위성방송 수신용 원편파 HTS 배열 안테나 관한 연구)

  • 정동철;윤창훈;최효상
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.17 no.7
    • /
    • pp.776-781
    • /
    • 2004
  • We report the performance of a four-element, 11.67 GHz, $high-{T}_c$ superconducting (HTS) microstrip antenna array with corporate feed network. The HTS antenna array used in this work had a circular polarization for direct broadcasting satellite (DBS) system. Our array antennas were designed and built on a 0.5 mm thick MgO substrate. To compare the superconducting antennas with normal conducting counterpart, One antenna pattern was fabricated from gold thin film, and a second pattern was fabricated from ${YBa}_2{Cu}_3{O}_7-x(YBCO)$ superconducting thin film. To improve the axial ratio of circularly polarized arrays, sequential rotation technique were used. Efficiency, radiation pattern, return loss and bandwidth were measured for both antennas at cryogenic temperature and room temperature. The array produced good circular polarization, and the gain of the array at 77 K, relative to a copper array at room temperature was approximately 1.54 dB. The measured return loss of our HTS antenna array was 35.79 dB at the resonant frequency of 11.67 GHz and The total effective bandwidth was about 3.4 %. The results showed that high-temperature superconductors, when used in microstrip arrays, improved the efficiency of the HTS antenna array for circularly polarization.