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Polibits

versão On-line ISSN 1870-9044

Polibits  no.44 México jul./dez. 2011

 

Optical Parameter Extraction using Differential Evolution Rendering in the Loop

 

Mauricio Olguin Carbajal1, Ricardo Barrón Fernández2, and José Luis Oropeza Rodríguez2

 

1 Postgraduate department, Centro de Innovacion y Desarrollo Tecnológico en Computo (CIDETEC), IPN, Mexico City, Mexico (e–mail: molguinc@ipn.mx).

2 Center for Computing Research (CIC), National Polytechnic Institute (IPN), UP "Adolfo Lopez Mateos", Mexico City, Mexico (e–mail: rbarron@cic.ipn.mx, joropeza@cic.ipn.mx).

 

Manuscript received May 26, 2011.
Manuscript accepted for publication August 24, 2011.

 

Abstract

Image synthesis is highly dependent on rendering algorithm and optical properties of scenario objects. The goal of this work is to develop a methodology to obtain some illumination parameters of a real scenario represented by an acquired image, and use these parameters for a virtual scenario rendering with the same objects as the original. The proposed methodology consists, first, in acquiring an image of the working scenario, and by using a DE (Differential Evolution) algorithm to render images that gradually approximate to the real acquired image, by some virtual scenario parameter modification based on the DE optimization. We call it "ED Rendering in the loop". Finally we use the obtained parameters to render an image to compare it with similar methods.

Key words: Differential evolution, rendering, images, loop, illumination, model.

 

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