基于前视钻孔摄像提取全景图像的方法

摘要

依据前视钻孔窥视仪在地质勘探中的相关数据,提出一种将前视图像进行数字图像处理得到对应全景图像的方法,将钻孔孔壁全景范围内的三维柱面空间投影到二维平面.首先根据图像特征确定图像的圆心并划定半径,然后利用极坐标转换结合插值算法,得到矩形平面展开图,再利用图像灰度特征相似度准则和滤波技术进行图像匹配拼接,得到满足定量分析要求的全景图.%A new method that transforming the forward borehole images to panoramic images was proposed, according to the related data measured by forward borehole camera in geological exploration.Two-dimensional plane could be projected by three-dimensional cylindrical space in the panoramic range of the borehole wall.Firstly, center and radius of the circle was determined according to the feature of images.Then, rectangular plan was obtained by polar coordinate conversion and interpolation algorithm.Finally, the panoramic images that satisfied the quantitative analysis demand could be matched and stitched by image gray feature similarity criterion and filtering technology.