The segmentation of the airway tree is an important preliminary step for many clinical applications. In this paper we present a method for fully automated extraction of airways from volumetric computed tomography (CT) images based on a self-adapting region growing process. The method consists of 3 main steps. Firstly the histogram of a dataset is analysed. Secondly the trachea is searched and s...

Region growing is an image analysis technique that uses the spatial patterns in an image to divide an image into regions or spatially continuous clusters. A region growing process is an iterative bottom-up optimization process, where in each round the most similar neighbouring regions are merged, minimizing the dissimilarity within the regions and maximizing the dissimilarity between the region...

Recent ezperimental results [I] on human &ion show that low fractal dimension lines are highly capable to evocate namable objects. In other t e r n , regular lines are recognized by human vision as object edges. In this paper, a regularity measure of discrete lines geometry is presented. This quantitative measure based on a ratio between lines lengths at different scale is analyzed in the frame...

In the sight of difficulty in segmentation of armor plate surface defects, visual attention mechanism is applied to segment defects images of steel strip surface, the key step of visual attention mechanism-fusion method of saliency images is improved, thinking of the contribution of salient area size, number and distribution to the comprehensive salient image, gray level consistency and GLCM’s ...

Plant disease has been a major constraining factor in the production of cucumber,the traditional diagnostic methods usually take a long time, and the control period is often missed. We take computer image processing as a method, preprocessing the images of more than 100 sheets of collected samples of cucumber leaves, using the region growing method to extract scab area of leaves to get three fe...

This paper presents a speech/music discriminator for radio recordings, based on a new and computationally efficient region growing technique, that bears its origins in the field of image segmentation. The proposed scheme operates on a single feature, a variant of the spectral entropy, which is extracted from the audio recording by means of a short-term processing technique. The proposed method ...

Robust high-breakdown-point location estimators are employed to analyze image stacks under the piecewise constant image structure model. To reduce the effect of bias along the Z-axis, the class parameters are extracted using three consecutive slices, The segmentation algorithm first determines the most reliable seed regions, which are then used in a region-growing procedure supported by local e...

We present an automatic and computationally conservative boundary extraction method using available priori information in a framework consists of change detection mask, region growing, and trajectory motion. Instead of segmenting a entire video frame, only the regions belong to a target object specified by a set of rules are detected. One example of such rules is skin color features of a human ...