Accuracy Evaluation of Point Cloud Angular Resolution
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摘要: 角度分辨率是决定点云目标细节提取能力的主导因素,角度分辨率模型是由平均调制传递函数AMTF模型推导而来,AMTF模型受采样间隔AMTFS模型、光斑大小AMTFb模型和量化精度AMTFq模型共同影响,通过分析采样间隔和光斑大小的误差因子,推导采样间隔和光斑大小精度评定公式。根据AMTF模型与采样间隔和光斑大小的关系式,对AMTF模型进行线性化;依据误差传播规律详细推导了截止频率的中误差,并利用截止频率与角度分辨率的关系,实现了角度分辨率的精度评定。Abstract: Angular resolution is the dominant factor for determining the extraction ability of a point cloud target.An angular resolution model is derived from average modulation transfer function(AMTF).The AMTF model is affected by sampling interval AMTFS、spot size AMTFb and quantization AMTFq.An accuracy assessment formula for sampling intervals and spot size was derived through an analysis of the error factor of sampling interval and spot size.The Linearization of AMTF model was based on the relationship among AMTF model、the sampling interval and spot size;The standard deviation of the cut-off frequency is derived according to the error propagation law;and an accuracy evaluation for angular resolution is achieved according to the relationship between cut-off frequency and angular resolution.
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Keywords:
- angular resolution /
- sampling interval /
- spot size /
- EIFOV /
- AMTF
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[1] 朱凌石若明,. 地面三维激光扫描点云分辨率研究[J]. 遥感学报. 2008(03)
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