Handy Microscopic Close-Range Videogrammetry

Abstract

The modeling of small-scale objects is used in different applications such as medicine, industry, and cultural heritage. The capability of modeling small-scale objects using imaging with the help of hand USB digital microscopes and use of videogrammetry techniques has been implemented and evaluated in this paper. Use of this equipment and convergent imaging of the environment for modeling, provides an appropriate set of images for generation of three-dimensional models. The results of the measurements made with the help of a microscope micrometer calibration ruler have demonstrated that self-calibration of a hand camera-microscope set can help obtain a three-dimensional detail extraction precision of about 0.1 millimeters on small-scale environments.

Cuneiform Tablets Micro-Surveying in an Optimized Photogrammetric Configuration

“…Therefore, USB handheld digital microscopes are more flexible, easy to use, and less expensive than traditional models. Born for the inspection, documentation, and digital metrology analysis and already widespread in the manufacturing industry for quality control and in the medical field, digital microscopes have also been used for some applications of a micro-photogrammetric survey, even reaching a precision of about a tenth of a mm [40].…”

“…The 'so-called' USB microscopes constitute an optical inspection system designed to obtain as output the image on a monitor, possibly by means of dedicated software [44]. As is shown, the magnifying capacity and the ability to be tilted, given the shape and small size, enable images with appropriate intersection angles to the object to be obtained for the generation of three-dimensional models [40] according to the known SfM procedures.…”