Surface Shape Visualization

Each image below links to an interactive viewer. Zoom can be performed by scrolling with the mouse or by clicking on the button in the upper left hand corner of the image. The curtain slider can be translated across the image by grabbing the central bar to reveal either the color-only view of the painted surface (on the left side) or the surface normal vector map (on the right side) which provides a visualization of the surface topography. Alternatively, the curtain slider can remain fixed in place and the images themselves can move across this plane.

The surface topography of these painted surfaces is composed of the sub millimeter brush and tool marks that reveal how these objects were made. We present this information as a surface normal vector map, calculated via photometric stereo (PS).  A surface normal vector indicates the direction a surface is oriented. Here we conveniently store these data as an RGB image where the red, green, and blue channels are respectively the X, Y, and Z components of the vector. For this project we developed a new PS algorithm that takes into account near lighting conditions and specular reflectances. More information about this work and how we captured these data can be found at the comp photo lab.

All visualizations work on Chrome, Firefox, and Safari browsers.

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