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KMID : 0372919950160040499
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Journal of Biomedical Engineering Research
1995 Volume.16 No. 4 p.499 ~ p.506
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Three Dimensional Shape Estimation by Shading Analysis of Endoscopic Image
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Abstract
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A new numerical method estimated three dimensional shape of the internal surface of the stomach by analyzing the shading data of endoscopic image. First analyzed was the inherent instrumentational characteristics of the endoscope system, followed by the analysis of the stomach surface properties, both of which affected the imaging properties. We employed these prior informations to implement the iterative algorithm of shading analysis based on Hom’’’’s variational approach. The present algorithm was validated by performing simulation on a 256 x 320 image data chosen from original 512 x 512 image of the stomach surface model. The best 3-dimensional estimation of the surface was achieved with the Lagrangian multiplier, of 0.3, when the algorithm best converged showing minimal estimation error.
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