The Temporal and Spatial Positioning Model Based on the Principle of Analemmatic Sundial in Different Parameters
- DOI
- 10.2991/nceece-15.2016.199How to use a DOI?
- Keywords
- Shadow Trigonometric Model Analemmatic Sundial Principle |y/x| Scale Model Ginput Function Dynamic Measurement Error Filter Rule
- Abstract
When analyzing the data of photos and videos, it’s very important to determine the shooting time and place. Usually, we can get the sun's shadow from the pictures and videos and establish different mathematical models to solve time and space positioning problems by the known parameters. Firstly, use basic amounts to establish Analemmatic sundial model; when obtaining a series of picture messages, you can get vertex coordinate data of a fixture’s sun shadow on the level ground. Then to establish |y/x| scale model by Orthogonal multinomial fitting method, which can solve the latitude and longitude separately, and select 1 ‰ screening indicator as the error correction to get exact location; About shooting time, according to |y/x| scale model determining the position longitude, using MATLAB to enumerate solar declination, then develop Dynamic measurement error filter rule, select the appropriate latitude and solar declination values to calculate shooting date; when getting a video recording a fixture shadow changes, use MATLAB function of Videoreader frame image, then use Rgb2gray Function convert into gray image, finally use Ginput Function reads the image coordinates. Use those to establish a comprehensive model to get the time and location of the video shoot.
- Copyright
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Yu Liu AU - Xuedong Zhu AU - Xuefa Xia PY - 2015/12 DA - 2015/12 TI - The Temporal and Spatial Positioning Model Based on the Principle of Analemmatic Sundial in Different Parameters BT - Proceedings of the 2015 4th National Conference on Electrical, Electronics and Computer Engineering PB - Atlantis Press SP - 1124 EP - 1129 SN - 2352-5401 UR - https://doi.org/10.2991/nceece-15.2016.199 DO - 10.2991/nceece-15.2016.199 ID - Liu2015/12 ER -