Polynomial+Texture+Mapping+Background



//This is one of the source images that made up a PTM of a pinscreen. This particular shot was taken with the light source directly above the camera, at an angle essentially perpendicular to the pinscreen. There is indeed textural detail to be found in the image, but such detail is certainly limited here. If the textural details were very small (such as erased pencil marks), then this image would be even less useful.//

// Using the PTMViewer software, users can open .ptm files created by the PTMFitter. This software allows users to manipulate the light source as they please, as well as providing other useful tools for image review that have not been fully explored yet by the IFE group. //

//This screenshot from the pinscreen PTM in the PTM Viewer demonstrates how users can control the simulated light source by moving their cursor over different parts of the circle on the right-hand side of the screen//. //This enables users to view otherwise difficult-to-see textures in objects. By moving the light to different angles, it is much easier to determine the textures imprinted in this pinscreen.//

//With the light at a narrow angle from the left side of the image, viewers can now clearly see the depressions (the author's thumb prints) in the pinscreen that were difficult to perceive in the previous image and [|can you learn to sing]//.

//With a simulated narrow-angle light from the right-hand side of this image, it is much easier to see the textures in this pinscreen.//

One of the greatest benefits of PTMs is their low cost. The PTM shown above was created not in a lab, but on the floor of a dormitory room. This PTM was created with the following materials: a Konica Minolta 7D digital SLR, a remote release, a few books on which to position the camera, a six-inch ruler, a desk lamp, and an extension cord. While it involved manually repositioning the light source, taking vector measurements, and triggering the camera for each image, it is easily possible to automate this process without adding unnecessary cost or complexity.

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