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Automated speaker recognition system is extremely important in areas such as Forensic and Defense. Performance of an automated speaker recognition system is dependent on feature extraction and classification. As speech is a non-stationary signal and the information is present in low frequencies, it necessitates a non-stationary tool that performs multi resolution analysis. An exhaustive approach is...
Ultrasonic Testing is the widely used NDT technique for flaw detection in thick walled weldments. It is an indirect technique and the signals are to be analyzed in order to characterize the flaw. Manual interpretation of these signals is subjective in nature and is dependent on the expertise of the individual. Hence the paradigm has shifted to automated signal analysis. In this paper a successful...
The role of internet became a non replaceable one in our day to day life. Internet users also face various security threats such as eavesdropping and unauthorized access through intrusion. Internet users need to be protected and provided privacy. Network security and image encryption has become important and high profile issues. Various cryptographic techniques are already available in literature...
Infrared thermography is recently widely accepted as a medical diagnostic tool. Thermographs are acquired for the whole body or the region of interest. Thermographs are processed for abnormality detection and quantification. As temperature variations are not normally visible to naked eye it is necessary to develop and analyze the feature extraction algorithms for abnormality detection. This paper...
Infrared Imaging is a totally non-invasive, non-contact, medical imaging procedure for detecting and monitoring various diseases and physical injuries. It diagnoses abnormal areas in the body by measuring heat emitted from the skin surface and expressing the measurements into a thermal map called thermograms. Abnormalities manifest as hot spots in thermograms. Thermologist has to interpret thermograms,...
Tungsten inert gas welding is the best suited welding technique for precision welding in atomic and aircraft industries. The most commonly occurring weld defect is tungsten inclusion, which is mainly due to high welding current. Monitoring and controlling weld current can avoid the defect. Developing an automated on-line welding system to correct the deviation in the welding current requires an effective...
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