--In this paper, an improved edge detection method which computes image edges using the concept of Sobel Operator with Center of Mass method is presented. The proposed method can be used as framework for multi-scale edge detectors in image processing. Here the edge detection by Sobel Operator with Center Of Mass method is compared with simply COM method. Keywords--Edge detection, Sobel operator...

We experimentally investigate the performance of a nonlinear parametrically driven mass sensor in the presence of detection noise. Mass detection is achieved by measuring the amount of methanol vapor adsorption on the sensor. To demonstrate the advantage of parametric sensing in counteracting the influence of detection noise, we operate the sensor in both the parametric and harmonic resonance m...

Breast cancer is one of the most common forms of cancer among women. Currently mammography (X-ray examination of the breast) is the most efficient method for early detection. Two independently developed methods for detecting cancer-indicating masses in mammograms are presented in this paper. The first method is based on pixel intensities, the second one on texture features. The possible combina...

This paper investigates an alternative mass sensing technique based on nonlinear micro/nanoelectromechanical resonant sensors. The proposed approach takes advantage of multi-stability and bifurcations of the hysteretic frequency responses of the electrostatically-actuated resonator. For this purpose, a reduced-order model is considered. Numerical results show that sudden jumps in amplitude make...

This paper presents a combined system for detecting masses in mammographic images. The proposed approach analyses the mammograms in three major steps. First a global segmentation method is applied to find the regions of interest. This step uses texture features, decision trees and a multiresolution Markov Random Field model. The second stage works on the output of the previous algorithm. Here a...

Breast cancer remains as a leading cause of cancer deaths among women in many parts of the world. Cancer is an abnormal, continual multiplying of cells. Most types of cancer cells eventually form a lump or mass called a tumor. In this paper, an automatic CADe system for mammographic mass detection that uses complex texture features is employed. The presence of ambiguous margins of lesions and v...

Topology potential theory is a new community detection theory on complex network, which divides a network into communities by spreading outward from each local maximum potential node. At present, almost all topology-potential-based community detection methods ignore node difference and assume that all nodes have the same mass. This hypothesis leads to inaccuracy of topology potential calculatio...