抄録
To ensure the safety of large-scale civil engineering structures, a detailed geological survey is required, particularly to identify the borders between different strata because the stratal border may become a landslide surface. The current borehole TV system technique allows stratal borders to be traced visually; however, this system is both time and labor intensive.
The present paper introduces a new technique, the Sampled Active Contour Model (Sampled-ACM), which can identify a stratal border more quickly and in more detail. The Sampled-ACM has the following characteristics: (1) By extending the Sampled-ACM into a virtual closed curve, the characteristics of a borehole image can be used. (2) Discontinuous stratal borders can be extracted as a smooth continuous curve. (3) The dip and strike of a stratal border can be easily calculated. These advantages enable highly detailed, expert evaluation of a stratal border to be performed quickly, efficiently, and almost automatically.
