双根岩心图像采集中的失真研究与校正

Research on Image Distortion and Correction for Double Rock Core Scanning

针对双根岩心图像采集系统存在的几何失真和亮度失真,建立系统成像的几何模型,在朗伯辐射体假设前提下,推导出图像几何校正的坐标变换公式以及亮度校正方法。实验表明,该方法能够有效地校正圆柱形岩心图像的几何与亮度失真,满足后续图像分析与信息提取的要求,且可以同时采集两根岩心进行校正,提高了图像处理的效率,具有较高的工程实用性。

This paper first established a geometric model of a camera system collecting the image of double rock cores scanning. And then derived the transformation formla for correcting the geometric distortion and brightness difference according to the lambert＇s law. Experiments showed that this method can effectively con＇ect the distortions in both geometry and brightness of the image of double rock cores scanning. The corrected image can satisfy the requirements of follow-up rock core geologic examination . Besides, The this method can support the geometric and hyperspectral scanning fir double rock cores at one time which will largely increase the efficiency of the rock core image collection system.