Various PLD renderings of a Carausius Antoninianus coin (Zuid-Beveland, NED)

<p>Renderings of 4 variants based on one Portable Light Dome (by KU Leuven)&nbsp;image dataset of both sides of the coin.</p> <p>Line 1: Standard visual representation with the recorded texture, any reflection with highlights are removed by the photometric stereo algorithm.<br> Line 2: Representation without the recorded texture, a so-called shaded image. Only the surface geometry and the shading of a particular selected virtual light setting casted on the surface are visualized.<br> Line 3: Normal maps, this&nbsp;2D representation reveals 3D information. Every pixel in the image reveals information in what direction that point on the original surface is geometrically oriented. Pixels with&nbsp;blue shades are oriented towards the camera, the green shades&nbsp;towards the left upper corner, the red shades towards the right lower corner (Based on this information the PLD system can generate 3D models of the imaged surfaces, see line 4).<br> Line 4: Orthophoto of a 3D rendering of the PLD image dataset. On the 3D models a radiance scaling filter differentiates and accentuates the relief features. A particular virtual light casts light on the surface dropping shadows.&nbsp;</p>