نتایج جستجو برای: detection filter

تعداد نتایج: 676339  

Journal: :Bio-medical materials and engineering 2015
Tan Loc Nguyen Yonggwan Won

Snoring detection is important for diagnosing obstructive sleep apnea syndrome (OSAS) and other respiratory sleep disorders. In general, audio signal processing such as snoring sound analysis uses the frequency characteristics of the signal. Recently, a correlational filter Multilayer Perceptron neural network (f-MLP) has been proposed, which has the first hidden layer of correlational filter o...

Journal: :iranian journal of cancer prevention 0
mostafa langarizadeh faculty of medicine and health science, university putra malaysia, malaysia r mahmud faculty of medicine and health science, university putra malaysia, malaysia ar ramli faculty of engineering, university putra malaysia, malaysia s napis information and communication development center, university putra malaysia, malaysia mr beikzadeh malaysian institute of microelectronic systems, malaysia wez wan abdul rahman faculty of mathematics and quantitative research, university technology mara, malaysia

background: breast cancer is one of the most important diseases in females. malaysian women have not excluded. according to the malaysian oncology society [1], about 4% of women (who are 40 years old and above) have involved by breast cancer. masses and microcalcifications are two important signs for breast cancer diagnosis on mammography. according to our estimation, radiologists could diagnos...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2014
Yoshito Wakui Toshishige M Suzuki

In this study, a simple and effective method for the detection of trace amounts of arsenic in water samples was developed. Arsenic hydride generated by the reduction of a water sample was passed through a sensing filter retaining silver bis(2-ethylhexyl)dithiocarbamate complex. The original yellow color of the filter immediately turned reddish violet. The difference of color was observed by a r...

1992

In 1983 Canny presented criteria for measuring the quality of edge detectors and derived an optimal FIR-Filter for step edges by optimizing them. Four years later Deriche proposed an approach to edge detection based on Canny´s design utilizing IIR-Filters which can be implemented very efficiently recursively. Unfortunately, using the Deriche-Filter leads to a distortion of the amplitudes of the...

Journal: :Int. Arab J. Inf. Technol. 2015
Soumia Belhadi Nadjia Benblidia

After highlighting vessel like structure by an appropriate filter in Matched Filter (MF) technique, thresholding strategy is needed for the automated detection of blood vessels in retinal images. For the purpose, we propose to use a new technique of entropic thresholding based on Gray Level Spatial Correlation (GLSC) histogram which takes into account the image local property. Results obtained ...

2011
Eunyoung Ko Jaesang Cha Juyoung Lee Jintae Kim Jaekwon Shin Jawan Gu

This paper dealt with a detection of electric Arc signal by using Matched Filter in wastewater treatment plant of SWG(Smart Water Grid). We proposed one of solutions to prevent fires due to arc signals happened frequently in SWG linked wastewater treatment plant. As an arc signal detection solution in wastewater treatment plant of SWG, we proposed MF(matched filter) based arc signal detection a...

2010
Fenghui Yao Ali Sekmen Mohan Malkani

This paper presents a novel method for detecting multiple moving targets in real-time from infrared (IR) image sequences collected by an airborne IR camera. This novel method is based on dynamic Gabor filter and dynamic Gaussian detector. First, the ego-motion induced by the airborne platform is modeled by parametric affine transformation based on feature point matching, and the IR video is sta...

2000
Heung-No Lee Gregory J. Pottie

This paper extends previous works [1][2][3] in matched filter bounds and provides a theoretical calculation of detection probability of q-ary QAM signals transmitted over the diversity reception and multipath fading ISI channels. The matched filter bounds represent the best attainable detection performance of a particular system, which may or may not be realized with a practical system. While a...

1987
Davi Geiger Tomaso A. Poggio

Many problems in early vision are ill posed 1. Edge detection is a typical example. This paper applies regular-ization techniques to the problem of edge detection. We derive an optimal filter for edge detection with a size controlled by the regularization parameter and compare it to the Gaussian filter. A formula relating the signal-to-noise ratio to the parameter is derived from regularization...

1999
René Landry Vincent Calmettes Michel Bousquet

The designed rejection filter is of recursive prediction error (RPE) form and uses a special constrained model of infinite impulse response (IIR) with a minimal number of parameters. The socalled PIRANHA Filter is made up independent cascaded adaptive cells realising high rejection at certain frequencies. The convergent filter is characterised by highly narrow-bandwidth and uniform notches of d...

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