1 0 0 0 OA 三嶋暦

巻号頁・発行日
vol.[28], 1811
出版者
巻号頁・発行日
vol.第280冊,
著者
花瀬 貴美 矢野 良和
出版者
愛知工業大学
雑誌
愛知工業大学研究報告 = Bulletin of Aichi Institute of Technology (ISSN:18833217)
巻号頁・発行日
no.52, pp.68-75, 2017-03-31

Image information to be obtained from the target in real world may be distorted because they are on the curved surface. Existing techniques of image processing are designed for planar images, and are not suitable for distorted images. To apply existing techniques for distorted images, planation methods are desired. These methods need 3D structure information to be stretched into plain surface, but estimated 3D information obtained by structure measurement tools such as stereo vision or SfM(structure from motion) are represented with low resolution. In order to obtain planared image using low resolution 3D information, we proposed grid expansion technique with two sampled grids of different phases. Experimental results showed the effectiveness of our proposed method.
著者
Woosub ROH Masaki SATOH
出版者
Meteorological Society of Japan
雑誌
気象集誌. 第2輯 (ISSN:00261165)
巻号頁・発行日
vol.96, no.1, pp.55-63, 2018 (Released:2018-02-08)
参考文献数
34
被引用文献数
10

As an alternative approach to previous multisensor satellite evaluations for cloud system resolving models (CSRMs), a technique for precipitation clouds over the ocean of CSRMs is presented using combined infrared and microwave channels. This method quantitatively analyzes precipitation clouds using cloud-top temperatures and ice scatterings from infrared 11 μm and high frequency microwave (89.0 GHz) brightness temperatures (TBs). The TB threshold at low frequencies (18.7 GHz) is used to identify precipitation regions. This method extends a previous approach based on tropical rainfall measuring mission (TRMM) precipitation radar which uses a narrow coverage, by incorporating a wide passive microwave sensor swath and ice cloud sensitivity.  The numerical results of the non-hydrostatic icosahedral atmospheric model, NICAM, with two cloud microphysics schemes were evaluated over the tropical open ocean using this method. The scattering intensities in both simulations at 89.0 GHz were different due to the parameterizations of the snow and graupel size distributions. A bimodal snow size distribution improved the TB underestimation at 89.0 GHz. These results exhibited similar structures to the joint histograms of cloud-top temperatures and precipitation-top heights generated using the previous method; the frequencies of overestimated scattering intensities in this study and the frequencies of high precipitation-top heights above 12 km in the previous study. It was observed that the change in the snow size distribution in the cloud microphysics scheme can lead to better agreements of simulated TBs at 89.0 GHz. Furthermore, we investigated the impacts of nonspherical snow assumptions using a satellite simulator. The effect of a nonspherical snow shape in the radiative transfer model caused a smaller change in TBs at 89.0 GHz compared to the difference between the TBs of the two simulations without nonspherical assumptions.

1 0 0 0 OA 保元物語 : 3巻

巻号頁・発行日
vol.[3], 1618

1 0 0 0 OA 御書附留帳

出版者
巻号頁・発行日
vol.第50冊,

1 0 0 0 OA 撰述格例

出版者
巻号頁・発行日
vol.[45] 初編 第十三ノ一 ゆすりかたり似金銀横取之類,