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- Kostas Delibasis, Aristides I. Kechriniotis, C. Tsonos, Nicholas D. Assimakis
- Computer Methods and Programs in Biomedicine
- 2010

An automatic algorithm capable of segmenting the whole vessel tree and calculate vessel diameter and orientation in a digital ophthalmologic image is presented in this work. The algorithm is based on a parametric model of a vessel that can assume arbitrarily complex shape and a simple measure of match that quantifies how well the vessel model matches a… (More)

- Nicholas D. Assimakis, Emmanouil Z. Psarakis, Demetrios G. Lainiotis
- Neural Parallel & Scientific Comp.
- 2003

Generalizations of the classical and perturbed trapezoid inequalities are developed using a new mean value theorem for the remainder in Taylor’s formula. The resulting inequalities for N -times differentiable mappings are sharp.

- Demetrios G. Lainiotis, Nicholas D. Assimakis, Sokratis K. Katsikas
- Neural Parallel & Scientific Comp.
- 1995

In this paper a new approach for the steady state Kalman Filter implementation is proposed. The method is faster than the classical one; this is very important due to the fact that, in most real-time applications, it is essential to obtain the estimate in the shortest possible time.

- Kostas Delibasis, Aristides I. Kechriniotis, Nicholas D. Assimakis
- IEEE Transactions on Signal Processing
- 2012

This work investigates the usefulness of univariate Hermite interpolation of the total degree (HTD) for a biomedical signal processing task: slice interpolation in a variety of medical imaging modalities. The HTD is an algebraically demanding interpolation method that utilizes information of the values of the signal to be interpolated at distinct support… (More)

- Konstantinos K Delibasis, Aristides I Kechriniotis, Nicholas D Assimakis, Simone Tassani, George K Matsopoulos
- Conference proceedings : ... Annual International…
- 2012

Univariate Hermite interpolation of the total degree (HTD) is an algebraically demanding interpolation method that utilizes information of the values of the signal to be interpolated at distinct support positions, as well as the values of its derivatives up to a maximum available order. In this work the interpolation kernels of the univariate HTD are… (More)

- Nicholas D. Assimakis, S. Roulis, Demetrios G. Lainiotis
- Neural Parallel & Scientific Comp.
- 2003

- K. K. Delibasis, P. Asvestas, G. K. Matsopoulos, T. Economopoulos, Nicholas Assimakis
- 2009 16th International Conference on Systems…
- 2009

A real time image based system is presented that is able to measure eye movement related quantities at high frame rate. The system’s hardware component allows for high frame rate image acquisition under near infrared constant lighting conditions, whereas the software component is capable of performing real time image processing to determine the values of… (More)

- Demetrios G. Lainiotis, Nicholas D. Assimakis, Sokratis K. Katsikas
- Neural Parallel & Scientific Comp.
- 1993