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位场数据边缘识别技术常常用来识别地质体的边缘位置。本文提出了一种新的位场数据边缘识别方法——归一化总水平导数垂向导数,它具有边缘探测和边缘增强两种功能。该方法首先计算位场数据的总水平导数THDR和总水平导数THDR的n阶垂向导数VDRn,并对n阶垂向导数VDRn采用取大于0的阈值技术得到总水平导数峰值PTHDR,该值可以用来进行边缘探测;其次,计算总水平导数峰值PTHDR与总水平导数THDR的比,并用最大值进行归一化得到归一化总水平导数垂向导数,该值可以用来进行边缘增强;最后,通过理论模型和实际资料检验了方法的有效性和可靠性。
Edge data edge recognition technology is often used to identify the location of the edge of the geological body. In this paper, we propose a new method for edge detection of bit-field data-normalized vertical derivative of total horizontal derivative. It has two functions: edge detection and edge enhancement. The method first calculates the n-th vertical derivative VDRn of the total horizontal derivative of the field data and the total horizontal derivative THDR, and obtains the total horizontal derivative peak PTHDR for the n-th vertical derivative VDRn by taking a value greater than 0, Secondly, the ratio of the total horizontal derivative peak PTHDR to the total horizontal derivative THDR is calculated and normalized with the maximum value to obtain the normalized vertical derivative of total horizontal derivative, which can be used for edge enhancement. Finally, The validity and reliability of the method are verified by theoretical models and practical data.