分类: 计算机科学 >> 计算机科学技术其他学科 提交时间: 2023-03-02
摘要: In this paper, we propose a disentangled representation transformer network (DRTN) approach for 3D dense face alignment and reconstruction.Unlike traditional 3DMM-based approaches in which the target parameters, namely the shape, expression, and pose parameters, are all individually estimated, without considering their direct influences on one another, although they are jointly optimized our DRTN aims to enhance the representation of facial attributes in a semantic sense by learning the correlation of different 3D facial attribute parameters.To achieve this we present a novel strategy to design disentangled 3D face attribute representation,which decomposes the given facial attributes into identity, expression, and poses parts. Specifically, the estimate of 3D face parameters in the regression network depends on the correlation of other face attribute parameters rather than being independent. The branching of the identity component aims to reinforce the learning of expression and pose attributes by preserving the overall face geometry structure and keeping the identity intact. Accordingly, the expression and pose parts of the branch maintain the consistency of expression and pose attributes, respectively. It helps refine the reconstruction and alignment of face details in large poses mainly by coupling other facial attribute parameters. Extensive qualitative and quantitative experimental results on widely-evaluated benchmarking datasets demonstrate that our approach achieves competitive performance compared to state-of-the-art methods.
分类: 天文学 >> 天文学 提交时间: 2023-02-19
摘要: The East Asian VLBI Network (EAVN) is an international VLBI facility in East Asia and is operated under mutual collaboration between East Asian countries, as well as part of Southeast Asian and European countries. EAVN currently consists of 16 radio telescopes and three correlators located in China, Japan, and Korea, and is operated mainly at three frequency bands, 6.7, 22, and 43 GHz with the longest baseline length of 5078 km, resulting in the highest angular resolution of 0.28 milliarcseconds at 43 GHz. One of distinct capabilities of EAVN is multi-frequency simultaneous data reception at nine telescopes, which enable us to employ the frequency phase transfer technique to obtain better sensitivity at higher observing frequencies. EAVN started its open-use program in the second half of 2018, providing a total observing time of more than 1100 hours in a year. EAVN fills geographical gap in global VLBI array, resulting in enabling us to conduct contiguous high-resolution VLBI observations. EAVN has produced various scientific accomplishments especially in observations toward active galactic nuclei, evolved stars, and star-forming regions. These activities motivate us to initiate launch of the 'Global VLBI Alliance' to provide an opportunity of VLBI observation with the longest baselines on the earth.