Papers Published

1. Sinha, A; Brady, D, Size and shape recognition using measurement statistics and random 3D reference structures., Optics Express, vol. 11 no. 20 (October, 2003), pp. 2606-2618 [doi] .
   (last updated on 2023/06/01)

   Abstract:
   Three dimensional (3D) reference structures segment source spaces based on whether particular source locations are visible or invisible to the sensor. A lensless 3D reference structure based imaging system measures projections of this source space on a sensor array. We derive and experimentally verify a model to predict the statistics of the measured projections for a simple 2D object. We show that the statistics of the measurement can yield an accurate estimate of the size of the object without ever forming a physical image. Further, we conjecture that the measured statistics can be used to determine the shape of 3D objects and present preliminary experimental measurements for 3D shape recognition.

   Keywords:
   Pattern recognition;Lenses;Radon;Charge coupled devices;Mapping;Probability density function;Statistical methods;Fourier transforms;Algorithms;