| 一种大视场星图星点提取的阈值算法 |
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| 引用本文： | 原玉磊,郑勇. 一种大视场星图星点提取的阈值算法[J]. 海洋测绘, 2011, 31(5): 41-43 |
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| 作者姓名： | 原玉磊 郑勇 |
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| 作者单位： | 解放军信息工程大学测绘学院,河南郑州,450052 |
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| 基金项目： | 国家自然科学基金项目(10878025) |
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| 摘 要： | 确定区分星点与背景的阈值是星空图像处理的重要环节。介绍了根据背景灰度统计特征确定阈值的算法,根据星空图像灰度直方图的走势,提出一种基于灰度直方图的阈值算法;通过对实际拍摄大视场星图的处理,基于统计的阈值容易将亮背景中的亮噪声误认为星点提取,而基于直方图的阈值能够滤除这些噪点;针对星图中星点亮度不一的情况,提出在全局阈值的基础上应用Bernsen算法计算局部阈值提取暗星点,实验证明该算法能较充分地提取暗星图像。
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| 关 键 词： | 阈值算法 星点提取 灰度直方图 局部阈值 Bernsen算法 |
A Threshold Segmentation Method of Star Extraction in Large Field Star Image |
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| YUAN Yu-lei,ZHENG Yong. A Threshold Segmentation Method of Star Extraction in Large Field Star Image[J]. Hydrographic Surveying and Charting, 2011, 31(5): 41-43 |
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| Authors: | YUAN Yu-lei ZHENG Yong |
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| Affiliation: | YUAN Yu-lei,ZHENG Yong(Institute of Surveying and Mapping,Information Engineering University,Zhengzhou,Henan,450052) |
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| Abstract: | Calculating the threshold of segmenting star point and background is necessary in star image processing.The threshold segmentation method based on the statistical feature of background image is discussed,and a new method is represented according to the star image's gray histogram.The experiment in large field star image processing is analyzed using the two methods.The threshold according to the statistical feature may extract the noise points as star points in light background,but the threshold according to... |
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| Keywords: | threshold algorithm star extraction gray histogram local threshold Bernsen algorith |
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