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Showing posts from July, 2017

How to scan shiny surfaces

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Windows, glasses, jewelry, metallic surfaces.. everything transparent, reflective or shiny... the eternal enemy of photogrammetry. Luckily, there are heroes which can fight these villains. They might be inconspicuous, blended within the crowd. However, they are always there to help in times of need. These heroes are called....wait for it... coating sprays! For those who are new to photogrammetry and are wondering why is it such a nightmare to scan transparent, reflective or shiny surfaces, the explanation is quite easy. Photogrammetry works based on exact positions of reference points on certain surface. Thus, with these types of objects, the surface has no texture/detail which software can pick up on and the reflection is changing as you move, hence the reference points cannot be defined. Imagine a glass... you don't only see reflection of yourself and the surrounding environment, but you see through the glass and see the distorted version of what is behind the glass. Bu