Time filter

Source Type

Joseph J.,National Institute of Technology Raipur | Jayaraman S.,Vel Technology Multi Technology | Periyasamy R.,National Institute of Technology Raipur
Current Medical Imaging Reviews | Year: 2016

Background: Edge preserving filters are widely preferred for medical image denoising as they do not degrade the morphological edges during smoothing. Even though, the operational parameters of these filters have crucial influence on their performance, the parameters are selected subjectively. The optimum values of the operational parameters can be selected objectively with the help of edge quality indices. The available edge quality indices either do not comply with the subjective quality ratings or they are prone to noise level. Objectives: (a) To formulate an edge preservation metric which has good correlation with subjective fidelity ratings and is robust to noise (b) To demonstrate an objective method for the selection of optimum values of the operational parameters of the non-linear spatial filters using the newly formulated edge preservation metric. Methods: Pratt’s Figure of Merit (PFOM) between the binary edge maps of the original and restored images, extracted via gradient based threshold, is used as the measure of extent to which edges are preserved during restoration. Magnetic Resonance (MR) images filtered by anisotropic diffusion for different values of number of iterations are used as ground truth images. The PFOM is compared with existing edge quality indices in terms of robustness to noise and correlation with subjective fidelity ratings. Results: PFOM exhibits a correlation of 0.9998 with the subjective edge quality rating which is only 0.9802 for Edge Preservation Index (EPI). Conclusion: The proposed index is robust to noise level and useful for optimizing the performance of non-linear spatial filters. © 2016 Bentham Science Publishers.

Joseph J.,National Institute of Technology Raipur | Sivaraman J.,Vel Technology Multi Technology | Periyasamy R.,National Institute of Technology Raipur
Journal of Medical Imaging and Health Informatics | Year: 2016

The noise suppression and edge preservation offered by Nonlocal Means (NLM) filter depends on the selection of decay control parameter and radii of search and similarity windows. If the decay control parameter is too small then little noise will be removed, while if it is too high, the image becomes blurry. Empirical selection of the filter parameters are always subjective and may be far from optimal. The present study demonstrates an automated method to compute decay control parameter from the noise estimate and an objective method to identify the optimum values of operational parameters using modified Pratt's Figure of Merit (PFOM) on Magnetic Resonance (MR) images. The decay control parameter is computed as the product of standard deviation of the noise and an arbitrary constant, termed as coefficient of noise variance. The radii of search, similarity windows and coefficient of noise variance which offer maximum noise suppression with minimum edge degradation were identified on multiple MR images with different textural and noise content. It has been observed that regardless of the textural and noise content of the MR image, the optimum range of coefficient of noise variance lies between four and eight, typically at seven. For MR images, the minimum radii of similarity and search windows should be greater than three, beyond which the radii has no significant influence on the performance of NLM, provided the radius of search window should be sufficiently larger than radius of similarity window, typically four times. Since the radii of search, similarity windows and coefficient of noise variance is robust to textural and noise content of the MR image, the computed decay control parameter depends only on the standard deviation of the noise. Hence, the proposed NLM is fully noise adaptive. The experimental analysis was performed in Matlab®. Copyright © 2016 American Scientific Publishers All rights reserved.

S Muthukumar S.,Vel Technology Multi Technology | Mathiyalagan P.,Vel Technology University
International Journal of Applied Engineering Research | Year: 2015

The wear resistance of material is an important requirement for many of the automotive, aircraft and aerospace components. In the present work abrasive and additive wear behaviour of Al-SiCp composites with different tests were studied. The Pin-on Disc wear testing machine has been fabricated to study the friction and wear behaviour of the Al-SiCp composites conditions. Also to study the characteristic friction and wear behaviour of Al-SiCp composite for application to engine parts under reciprocation conditions. The composites were manufactured by hot liquid infiltration technique. They concluded that fiber reinforcement significantly improved the abrasion résistance in mild abrasive situations; the abrasion resistance of the composites was equal to or, in some cases, even lower than that of the unreinforced materials. © Research India Publications.

Robert P.,Information Technology | Gowthami G.,Information Technology | Palanivel R.,Vel Technology Hi Technology | Janani G.,Vel Technology Multi Technology
International Journal of Control Theory and Applications | Year: 2016

To measure the actual parameters of the by taking a cervical image and that image to wavelet analysis toward find the cancer level with improved accuracy. Dyadic wavelet is used for calculating the actual parameters of the patients. growth and radio-responsiveness is made based on exponential, logistic laws and the linear quadratic (LQ) function. The cervical image is analyzed by wavelet transform to remove noise to the image and applying that image to Fuzzy logic. The output of the image is the applied to morphological find to determine the cancer level. © International Science Press.

Jebasingh Kirubakaran S.J.,Vel Technology Multi Technology | Karthikeyan A.,Vel Technology Multi Technology | Hema Latha A.,Vel Technology Multi Technology | Panneer Selvam G.,Vel Technology Multi Technology
International Journal of Control Theory and Applications | Year: 2016

Image is the most regular and suitable means of assigning or transmitting information. Under haze weather conditions, the images captured have degraded contrast. Several natural phenomena like haze, haze, mist, rain, etc. decrease the superiority of the pictures and become less visibility. These factors make the present image processing techniques error and sensitive susceptible. In this paper, we suggest an efficient learning based picture enhancement that eliminate or nullify the haze that exists in the captured images. Here the haze is eliminated by using the image enhancement algorithm where the intensity of the haze is calculated in regarding with the atmospheric veil. By applying contrast restoration technique in either horizontally separated rows or vertically separated columns the haze is eliminated from the image. We can use median filters in order to remove the haze that exists. This approach is very much useful in the case of providing driving assistance as the haze weather conditions make the control and operation of a motor vehicle a bit complex and dangerous. © International Science Press.

Preethi E.,Vel Technology Multi Technology | Mohamed Abbas A.,Vel Technology Multi Technology | Prabhu Kumar S.,Vel Technology Multi Technology | Kuppusamy P.G.,Vel Technology Multi Technology
International Journal of Control Theory and Applications | Year: 2016

In this paper we discuss how a memristor emulator based timing storage circuit could be used in biomedical applications. The memristor emulator can replicate many of the features of the real memristor. The memristor emulator can store and reproduce timing information in an analog manner without performing quantization which can be utilized for a wide range of applications. As an example, a 15-tap CT finite impulse response (FIR) Savitzky- Golay (S-G) filter was designed with memristor emulator-based delay blocks. The blood signal which varies infrequently is considered as input for the designed SG_FIR filter. The simulations were carried out using MATLAB and Modelsim. © International Science Press.

Vidya K.,Vel Technology Multi Technology | Gayathri R.,Vel Technology Multi Technology
International Journal of Control Theory and Applications | Year: 2016

Railway network provides the most crucial mode of social transportation over the world. Many technologies have been developed to prevent railway accidents but still the major accidents occurring in railway network. The scope of sensing technologies has distended quickly, hence the sensor devices becomes more efficient and cheaper. In this paper, to avoid the major accidents due to derailment and obstacles, the conditioning of tracks and tunnels will be continuously monitored by using WSN. The faults in rail tracks will be detected by using an IR Sensor testing methodology and obstacles in tunnels detected by Ultrasonic Sensor, hence it will reduce the manual inspection necessities and maintenances. The sensed data will send to the control room through wireless transceiver and the exact location of fault will be identified by using GPS. To avoid the minor accidents, the footboard travelling will be monitored by using an IR and Camera. The captured image will be passed to the next station control room through E-mail. The proposed work is implemented using an advanced Raspberry pi model with inbuilt ARM microcontroller LPC2138. The main objective of this paper to upgrade the safety and authenticity of railway network, hence this will lead to a vital development of our country. © International Science Press.

Siva S.,Madras Medical College | Suresh P.,Vel Technology Multi Technology | Seeba Merlin S.,Vel Technology Multi Technology | Punidha R.,Vel Technology Multi Technology
International Journal of Control Theory and Applications | Year: 2016

The rapid development of Internet of Things (IoT) technology makes it possible for connecting various smart objects together through the internet. Recent research shows more potential application of IoT in information intensive industrial sectors such as healthcare services. This paper proposes to monitor and control the environment condition and patients' health care condition using the smart hospital system. The patients' health condition can be monitored by spark kit. It monitors the temperature and heart rate sense of the patients. In environments condition we can monitor room temperature and normal and abnormal condition of air conditioner by sensors using RFID kit. RFID system consists of readers and tags. When RFID tag is ON it sends the patients information and status to the local user. The information should be in graphical view in structure. For every patient there is a patient ID. Using the patients ID the doctor can sense the patient status and he prescribe the medicine in graphical and text view. © International Science Press.

Kuppusamy P.G.,Vel Technology Multi Technology | Gopal B.G.,Vel Technology Multi Technology | Prabhu V.,Vel Technology Multi Technology
International Journal of Applied Engineering Research | Year: 2015

Development of mobile phone communication infrastructure in the world has promoted which lead public concern over possible health effect exposure to radio frequency electromagnetic energy (RFEME) emanating from mobile phone antenna. The Micro-strip patch antenna plays an important role in electromagnetic energy transmitting and receiving phenomena in mobile phone. This paper makes an effort to assess the mobile radiation exposure effect on 4 years child, 8 years child and an adult head model. Hand held device model having micro strip antenna is used for human interaction. The software simulation performed by Computer simulation technique(CST) software based on Finite difference Time Domain technique yields specific absorption rate and 3D-thermal distribution on spherical human head. © Research India Publications.

Bala Saravanan C.,Vel Technology Rangarajan Dr Saguunthala R And D Institute Of Science And Technology | Sarasu P.,Vel Technology Multi Technology
International Journal of Soft Computing | Year: 2015

This study highlights that currently a technology has been found for implementation in wireless communication that is to be used at greater distance. But there are various existing technologies in the field of wireless communication to that (Bluetooth, Wi-Fi). And each one of them varies depending on their class of radio frequency. Its application could be used only for a maximum distance of 10-100 m from phone to phone. There is a big problem in increasing the distance to chat through this device (Bluetooth, Wi-Fi) for communication. Therefore, there is an introduced new technology "Sky Tie". This technology has been introduced as a new processing method for each of P2P communication. It increases the communication distance from one end to another end through Industrial, Scientific and Medical (ISM) radio bands 2.45 GHz maximum 5 km. This study will enhance the communication process with this Sky Tie wireless technology. © Medwell Journals, 2015.

Loading Vel Technology Multi Technology collaborators
Loading Vel Technology Multi Technology collaborators