概括
这项研究引入了一种新的方法来纠正边缘投影形计中的投影镜头扭曲. 该技术通过对残余误差进行可靠的估计和补偿,显著提高了3D测量精度.
科学领域:
- 光学和光子学 在光学和光子学.
- 3D计量学 3D计量学
- 计算机视觉 计算机视觉
背景情况:
- 边缘投影概况测量中的投影镜片扭曲的传统参数模型具有有限的描述能力,导致显著的剩余错误.
- 现有的方法在剩余扭曲估计过程中经常忽略合错误,并且缺乏适应各种边缘模式的适应性.
研究的目的:
- 开发一个强大的残余扭曲 (RD) 计算方法,用于边缘投射型度计.
- 引入可适应的补偿策略,以准确纠正镜头扭曲.
- 为了提高3D测量的整体准确性和可靠性.
主要方法:
- 在RD计算中使用加权最小方程方法,重量系数来自初步纠正的3D点云.
- 开发了两种基于查找表的补偿方法:基于预扭曲的和基于线性网格的.
- 这些方法旨在提供可靠的错误估计和可适应的补偿,而不会增加校准复杂度.
主要成果:
- 拟议的RD计算方法可对残余误差进行可靠的估计.
- 这两种补偿方法都显著抑制了20×的全场扭曲误差.
- 与预补偿结果相比,错误减少了90%以上.
结论:
- 拟议的方法可以在边缘投射特征测量中实现准确和强大的镜头扭曲校正.
- 该方法可适应各种边缘模式,不需要额外的校准复杂性或硬件依赖.
- 这项工作通过提供更精确,更可靠的镜头扭曲校正技术,推动了3D计量学领域的发展.
相关概念视频
01:15Distance Corrections
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
01:12Adjusting a Traverse
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...