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Explore the innovative PTM technology, pioneered by Tom Malzbender in 2001, enabling control of lighting angles for enhanced surface texture visualization. Our ongoing project aims to develop a multi-spectral PTM device and present results at Imagine RIT festival. See our progress and future plans here!
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Polynomial Texture Maps (PTMs) • Pioneered by Tom Malzbender of HP Labs in 2001 • Displays an object so the user can control where the light is coming from • By viewing an object from different angles of illumination, surface textures become more visible. • Currently, there are many applications of PTMs
PTM Process • HP Labs' software: • PTMFitter • PTMViewer
Pixel colors can be represented numerically • There is a mathematical relationship between pixel color and illumination angle • Knowing color at several angles allows us to predict color at all angles Light source 1 1 Light source 2 2
PTM Fitter and Viewer • PTM Fitter • Creates a models of the variations in color at each pixel • Biquadratic polynomials (6 coefficients) • Minimum of 6 images • PTM Viewer • Reconstructs lighting angles based on fitted curves
Our Project Goal • Create a basic white light PTM dome by the end of Winter quarter • Create a PTM device using multiple wavelengths of light • Not exclusively white light
What We Have Accomplished - Proof of Concept Prototype and Miniature -Research and Understanding of PTM devices -includes contacts -Created work groups including software, camera, illumination/electrical, and structure.
Software Group • Accomplishments • Identification and Investigation of LabVIEW software • Understanding of use and benefits of B-Splines • Identification of needed user inputs and outputs • Have begun to program software and design user-interface
Camera Group • Accomplishments: • Have identified the Camera for basic PTM dome based on research of possible camera specs • Have learned about the Tone Transfer Function • Have begun to learn about Modulation Transfer Function Chosen Camera: Nikon D50
Illumination/Electrical Group • Accomplishments: • Have ordered and • tested lights including • LEDs, Solux, and • incandescent • Have learned how to • characterize light by • luminance, radiance, etc.
Structure Group • Accomplishments: • Have orderd a dome for our basic white-light PTM based off of our system requirements • Have created a CAD drawing of what our white-light PTM will look like • They have got in contact with the machine shop
What We Are Going To Do • Create a multi-spectral PTM device • Present our work at the Imagine RIT festival in May • Hopefully have a few students travel to DC to compare the PTMs made by our devices to those imaging devices at the Library of Congress • Maybe have students continue work on this project over the summer
Questions? ife2010.wikispaces.com/ Questions?