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arXiv 1612.04748astro-ph.IM
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天文巡天线性特征检测算法I.算法描述

Linear feature detection algorithm for astronomical surveys - I. Algorithm description

Dino Bektešević, Dejan Vinković

摘要:

计算机视觉算法是天文图像分析中的有力工具,特别是在要求目标检测和提取自动化的情况下。天文学中的现代物体检测算法面向恒星和星系的检测,完全忽略了现有线性特征的检测。随着大视场巡天的出现,线状地物作为近地小行星和流星快速飞越的可能轨迹引起了科学界的兴趣。在这项工作中,我们描述了一种新的线性特征检测算法,专门设计用于大数据天文学的实施。该算法结合了一系列算法步骤,首先从图像中删除其他物体(恒星,星系),然后增强线条,以便使用Hough算法进行更有效的线条检测。由于采用了一个步骤,即用矩形替换可能的线段,然后将拟合到矩形的线与直接从图像中获得的线进行比较,因此误报率大大降低。文中还讨论了该算法的速度及其在天文测量中的适用性。

英文摘要:

Computer vision algorithms are powerful tools in astronomical image analyses, especially when automation of object detection and extraction is required. Modern object detection algorithms in astronomy are oriented towards detection of stars and galaxies, ignoring completely detection of existing linear features. With the emergence of wide-field sky surveys, linear features attract scientific interest as possible trails of fast flybys of near-Earth asteroids and meteors. In this work we describe a new linear feature detection algorithm designed specifically for implementation in Big Data astronomy. The algorithm combines a series of algorithmic steps that first remove other objects (stars, galaxies) from the image and then enhance the line to enable more efficient line detection with the Hough algorithm. The rate of false positives is greatly reduced thanks to a step that replaces possible line segments with rectangles and then compares lines fitted to the rectangles with the lines obtained directly from the image. The speed of the algorithm and its applicability in astronomical surveys are also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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