Abstract
The field of extracting 3D information from photographs also known as photogrammetry has a wide range of applications, even in industry. It can be used to rapidly prototype a part with a decent precision. This paper analyses this possibility for a gas regulator that was cut in half. From the pictures taken of the part, a point-cloud can be generated that can be transformed in a mesh and subsequently in a CAD model. Alternatively, it can be compared with an existing CAD model to determine deviations.
Highlights
Being able to extract 3D information from an object is very important and leads to many applications especially in industry
The word photogrammetry means measuring from a photograph [3]
There are many factors affecting the reconstruction of 3D models from pictures through photogrammetry
Summary
Being able to extract 3D information from an object is very important and leads to many applications especially in industry. 3D models are mainly generated by use of non-contact methods based on light waves [1]. Geodetic measurement techniques such as spatial triangulation and optical alignment and levelling can be used [2]. When taking a picture of an object, we basically convert it from a 3D world into a 2D world During this process, information, mainly related to depth, is lost. We are able to convert 2D information back into 3D information This process is based on triangulation, which consists of intersecting converging lines in space and determining the precise location of a point [5]. This process is not perfect, because information is lost during the conversion stages
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