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Keywords:
probability density functions; estimation
probability density functions; estimation
Summary:
A method for estimation of probability distribution of transformed random variables is presented. The proposed approach admits an approximation of the transformation of the random variables. The approximate probability density function (pdf) is corrected to obtain a resulting pdf which incorporates a prior knowledge of approximation errors. The corrected pdf is not contaminated by any uncontrollable approximation. The method is applied to pattern recognition. It is shown that class conditional pdf of features can be easily computed even when the feature extraction was performed with nonlinear mapping of an input pattern.
References:
[1] Kittler J.: Statistics and Images: 2. (K. V. Mardia, ed.), volume 2 of Advances in Applied Statistics, chapter Statistical pattern recognition in image analysis. Carfax Publishing Company, 1994
[2] Mařík R., Kittler J., Petrou M.: Error sensitivity assesment of vision algorithms based on direct error–propagation. In: Workshop on Performance Characteristics of Vision Algorithms (H. I. Christensen, W. Forstner, and C. B. Madsen, eds.), Cambridge 1996, pp. 45–58
[3] Soukup L.: Probability Distribution of an Approximated Function with Uncertain Argument. Research Report No. 1877, Institute of Information Theory and Automation, Prague 1996
[4] Soukup L.: Probability distribution of approximation. In: The 2nd European Workshop on Computer–Intensive Methods in Control and Signal Processing (L. Berec, J. Rojíček and M. Kárný, eds.), Institute of Information Theory and Automation, Prague 1996, pp. 141–144
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