Open Access

A Novel Algorithm of Surface Eliminating in Undersurface Optoacoustic Imaging

EURASIP Journal on Advances in Signal Processing20042004:390738

DOI: 10.1155/S1110865704408191

Received: 7 January 2003

Published: 27 December 2004

Abstract

This paper analyzes the task of optoacoustic imaging of the objects located under the surface covering them. In this paper, we suggest the algorithm of the surface eliminating based on the fact that the intensity of the image as a function of the spatial point should change slowly inside the local objects, and will suffer a discontinuity of the spatial gradients on their boundaries. The algorithm forms the 2-dimensional curves along which the discontinuity of the signal derivatives is detected. Then, the algorithm divides the signal space into the areas along these curves. The signals inside the areas with the maximum level of the signal amplitudes and the maximal gradient absolute values on their edges are put equal to zero. The rest of the signals are used for the image restoration. This method permits to reconstruct the picture of the surface boundaries with a higher contrast than that of the surface detection technique based on the maximums of the received signals. This algorithm does not require any prior knowledge of the signals' statistics inside and outside the local objects. It may be used for reconstructing any images with the help of the signals representing the integral over the object's volume. Simulation and real data are also provided to validate the proposed method.

Keywords and phrases

optoacoustic imaging surface laser maximum likelihood

Authors’ Affiliations

(1)
Vympel Interstate Joint Stock Corporation

Copyright

© Zhulina 2004