IEEE Trans Image Process - Automatic craniofacial structure detection on cephalometric images.

Tópicos

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Resumo

Anatomical structure tracing on cephalograms is a significant way to obtain cephalometric analysis. Cephalometric analysis is divided in two categories, manual and automatic approaches. The manual approach is limited in accuracy and repeatability due to differences in inter- and intra-personal marking. In this paper, we have attempted to develop and test a novel method for automatic localization of craniofacial structures based on the detected edges in the region of interest. Before edge detection of the particular region, the region was filtered by adaptive non local filter for noise removal by keeping the edge information undisturbed. According to the gray-scale feature at the different regions of the cephalograms, modified Canny edge detection algorithm for obtaining tissue contour was proposed. With the application of morphological opening and edge linking approaches, an improved bidirectional contour tracing methodology was proposed by an interactive selection of the starting edge pixels, the tracking process searches repetitively for an edge pixel at the neighborhood of previously searched edge pixel to segment images, and then craniofacial structures are obtained. The effectiveness of the algorithm is demonstrated by the preliminary experimental results obtained with the proposed method.

Resumo Limpo

anatom structur trace cephalogram signific way obtain cephalometr analysi cephalometr analysi divid two categori manual automat approach manual approach limit accuraci repeat due differ inter intraperson mark paper attempt develop test novel method automat local craniofaci structur base detect edg region interest edg detect particular region region filter adapt non local filter nois remov keep edg inform undisturb accord grayscal featur differ region cephalogram modifi canni edg detect algorithm obtain tissu contour propos applic morpholog open edg link approach improv bidirect contour trace methodolog propos interact select start edg pixel track process search repetit edg pixel neighborhood previous search edg pixel segment imag craniofaci structur obtain effect algorithm demonstr preliminari experiment result obtain propos method

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