测绘通报 ›› 2025, Vol. 0 ›› Issue (5): 89-93.doi: 10.13474/j.cnki.11-2246.2025.0515

• 学术研究 • 上一篇    

多视角影像倾斜度对ASIFT算法特征匹配的有效性

解琨, 周杰   

  1. 江苏省基础地理信息中心, 江苏 南京 210013
  • 收稿日期:2024-09-10 发布日期:2025-06-05
  • 作者简介:解琨(1986—),男,硕士,高级工程师,主要从事摄影测量与遥感的研究工作。E-mail:77300696@qq.com
  • 基金资助:
    江苏省自然资源科技项目(2023008)

The effectiveness of multi-perspective image tilt on the feature matching of ASIFT algorithm

XIE Kun, ZHOU Jie   

  1. Provincial Geomatics Centre of Jiangsu, Nanjing 210013, China
  • Received:2024-09-10 Published:2025-06-05

摘要: ASIFT算法是一种影像特征提取算法,具有完全仿射不变性。它通过模拟摄像机光轴变化处理影像中的仿射失真,在视角变化较大的影像匹配中表现出较强的稳健性。为了研究倾斜航空摄影中不同倾斜度影像间对ASIFT算法特征匹配的影响,本文结合ASIFT算法中定义的两个仿射变换参数(绝对倾斜(absolute tilt)和过渡倾斜(transition tilt)),提出一种计算倾斜摄影中单张影像绝对倾斜度和多视影像间相对倾斜度的方法。通过在不同倾斜度条件下进行ASIFT算法匹配试验,分析总结不同倾斜度对特征匹配效果的影响,验证多视角影像倾斜度计算方法的有效性。

关键词: 倾斜摄影测量, ASIFT算法, 相对倾斜度, 绝对倾斜度, 影像匹配

Abstract: The ASIFT algorithm is an image feature extraction algorithm with complete affine invariance. It handles affine distortions in images by simulating variations in the camera optical axis, demonstrating strong robustness in images matching with large perspective changes.In order to study the influence of different tilt images on the feature matching of ASIFT algorithm in oblique aerial photography,this paper combines the two affine transformation parameters defined in the ASIFT algorithm: absolute tilt t and transition tilt τ. A method is proposed to calculate the absolute tilt of a single image and the tilt of multi-view images in oblique photography. By conducting ASIFT matching experiments under various tilt conditions, the paper analyzes and summarizes the effects of different tilt angles on feature matching,and validate the effectiveness of the multi-perspective image tilt calculation method.

Key words: oblique photogrammetry, ASIFT algorithm, relative tilt, absolute tilt, image matching

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