  This paper provides an overview of 3D scanning methodologies and technologies
proposed in the existing scientific and industrial literature. Throughout the
paper, various types of the related techniques are reviewed, which consist,
mainly, of close-range, aerial, structure-from-motion and terrestrial
photogrammetry, and mobile, terrestrial and airborne laser scanning, as well as
time-of-flight, structured-light and phase-comparison methods, along with
comparative and combinational studies, the latter being intended to help make a
clearer distinction on the relevance and reliability of the possible choices.
Moreover, outlier detection and surface fitting procedures are discussed
concisely, which are necessary post-processing stages.
