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This month’s images come from Adrian Moorhouse and Adrian Evans of the Dept Electronic & Electrical Engineering at the University of Bath. The images are taken from a paper entitled “The Nose on Your Face May Not be so Plain: Using the Nose as a Biometric” that was presented at the IET 3rd International Conference on Imaging for Crime Detection and Prevention, Kingston, UK, December 2009.
False colour surface normal and range images produced by the Photoface photometric stereo imaging system developed by the paper’s co-authors at the Machine Vision Laboratory, University of the West of England.
In the above image the nose tip and nasion regions are robustly identified using the curvature of the surface normals. The ratios of their widths to the nose ridge length provide a low dimensional feature for nose recognition.
The shape of the ridge in the range image is shown as black line in the above image. This is represented using Fourier descriptors to provide another feature. The combination of the geometric ratios and ridge Fourier descriptors provide a computation efficient approach to nose recognition. Further details are available on Dr. Evans' homepage.
Categories: Events research ,
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