Wyniki wyszukiwania - BazTech

1

HIST - an application for segmentation of hepatic images

Reska D., Krętowski M.

Zeszyty Naukowe Politechniki Białostockiej. Informatyka

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2011

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Z. 7

71-93

EN

HIST (Hepatic Image Segmentation Tool) is a Java-based application for segmentation and visualisation of medical images, specialised for hepatic image analysis. This paper contains an overview of the application features, a description of adapted segmentation algorithms and their experimental validation. The application provides two main segmentation methods, based on region growing and active contour model methods, adapted for the case of liver segmentation. HIST also offers data visualisation tools, including multiplanar reconstruction, volume rendering and isosurface extraction.

PL

HIST (ang. Hepatic Image Segmentation Tool – narzędzie do segmentacji obrazów wątroby) jest napisaną w języku Java aplikacją do segmentacji i wizualizacji obrazów medycznych, wyspecjalizowaną segmentacji w obrazów wątroby. Artykuł ten zawiera przegląd możliwości aplikacji, opis zaadaptowanych algorytmów segmentacji i wizualizacji oraz ich eksperymentalną walidację. Aplikacja oferuje dwie główne metody segmentacji, oparte o algorytmy rozrostu regionów i aktywnego konturu, dostosowane do segmentacji wątroby. Narzędzia wizualizacyjne aplikacji wykorzystają rekonstrukcję multiplanarną, rendering wolumetryczny oraz ekstrakcję izopowierzchni.

2

A comparison of fundamental methods for iso surface extraction

Patera J., Skala V.

Machine Graphics and Vision

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2004

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Vol. 13, No. 4

329-343

EN

This paper compares four fundamental methods for iso surface extraction based on cell decomposition to tetrahedra. The methods are compared both on mathematically generated data sets as well as on real data sets. The comparison using mathematical data is made from different points of view such, as area approximation, or volume approximation. On the other hand, the Hausdorff distance and the root mean square are used to compare methods on real data sets. The presented comparison can be of help when deciding which of the tested methods to choose, as well as when we need to compare a newly developed method with other existing approaches.

3

Two methods for iso-surface extraction from vlumetric data and their comparison

Skala V., Brusi A.

Machine Graphics and Vision

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2000

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Vol. 9, No. 1/2

149-166

EN

There are various methods for extracting iso-surfaces from volumetric data. Marching cubes or tetrahedra or raytracing methods are mostly used. There are many specific techniques to increase speed of computation and decrease memory requirements. Although a precision of iso-surface extraction is very important, too, it is not mentioned usually. A comparison of the selected method was made in different aspects: iso-surface extraction process time, number of triangles generated and estimation of radius, area and volume errors based on approximation of a sphere. Surprisingly, experiments proved that there is no direct relation between precision of extracted and human perception of the extracted iso-surface.