Efficient linear techniques for estimating the epipolar geometry
An ill-posed operator for secure Image Authentication

Royal Society Project

www.royalsoc.ac.uk

Efficient linear techniques for estimating the epipolar geometry

Description:

Accurate estimation of the epipolar geometry uses computational expensive iteration schemes based on nonlinear algebraic constraints to deal with the ill-posedness of the problem. Linear techniques are computationally efficient but extremely unstable. In this project, theoretical and practical aspects of linear methods are analysed and fundamental results are derived.

Publications:

1. E. Izquierdo, V.Guerra, “Optimizing the Efficiency of Linear Techniques to Estimate the Epipolar Geometry”, Digital Media Processing for Multimedia Interactive Services, World Scientific Publishing, pp. 439-445 (2003)
2. E. Izquierdo and V. Guerra, “Estimating the Essential Matrix by Efficient Linear Techniques”, IEEE Transactions on Circuits and Systems for Video Technology, Volume: 13,  No. 9, 2003.

An ill-posed operator for secure Image Authentication

Description:

A new schema for secure image authentication is introduced. It is based on a rather unconventional approach: the extremely high sensitivity of ill-posed operator to any change in the input data is turned into the tool to achieve fragile watermarking for secure image verification.

Publications:

1. E. Izquierdo and V. Guerra, “An Ill-Posed Operator for secure Image Authentication”, IEEE Transactions on Circuits and Systems for Video Technology, Special Issue on Authentication, Copyright Protection and Information Hiding, Vol. 13, No. 8, Sep. 2003.

Funding

Grant value: £ 4,650

Scientist in charge

Ebroul Izquierdo

People Involved

Valia Guerra Ones