Superimposition and projective transformation of 3D object.

Abstract:

:Superimposition is an efficient method for evaluation of coincidence between a skull and a photo portrait. The principle of superimposition method lies in the projection of the skull into the face image. During the projection of an object with a perspective camera, the mapping of a three-dimensional object into a two-dimensional image takes place. The acquired images of the same object are more or less distorted due to various photographic conditions, due to extrinsic and intrinsic parameters of the camera. The distortions have important influence onto reliability of human identification by the superimposition method. Mathematically we can describe most of the distortions. On the basis of the description the divergences could be simulated and in some cases eliminated by geometric transformation of the compared images. We are presenting a mathematical model of the standard projective camera and the mathematical description of distortions which are important for the superimposition process. The results show the distortions and the elimination of the distortions by means of the projection model.

journal_name

Forensic Sci Int

authors

Eliásová H,Krsek P

doi

10.1016/j.forsciint.2006.06.062

subject

Has Abstract

pub_date

2007-04-11 00:00:00

pages

146-53

issue

2-3

eissn

0379-0738

issn

1872-6283

pii

S0379-0738(06)00438-5

journal_volume

167

pub_type

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