Depth of field (FoV) is the distance between the nearest and the furthest objects that are in sharp focus of the camera. It determines the sharpness of the image. The aperture determines depth of field. A small aperture reflects high sharpness in the image.

Discontinuities are natural interruptions in the intact rock that impact the overall rock mass behavior under load and fluid flow. Discontinuities consist of fractures, joints, faults, shear zones, and bedding planes. 

Discontinuity Set Extractor (DSE) is a clustering based software that is used to extract discontinuity sets from a point cloud. It was developed by Adrián Riquelme as part of his PhD studies. Find more about DSE in https://rua.ua.es/dspace/bitstream/10045/50025/2/Discontinuity-Set-Extractor-software.pdf

A discrete fracture network (DFN) is a statistical distribution of fractures in the rock mass. Fractures are spatially variable, and their hydromechanical parameters are more accurately described by statistical distributions. DFNs provide a more probabilistic approach to record the degree of fracturing in a rock mass.