Digital Image Processing

C. F. Theresa Cenate ¹, B. Sheela Rani ¹, B. Venkatraman ²

Affiliations
1 Sathyabama University, Chennai-600 119, IN
2 Indira Gandhi Centre for Atomic Research, Kalpakkam–603 102, IN

Abstract

Time of Flight Diffraction (TOFD) is an advanced Ultrasonic Technique for examination of weld specimen in process industries. Ultrasonic experts are required for defect detection which means increase in resource is needed increased resource. Hence an algorithm has to be developed to automate the defect segmentation. This research work develops an algorithm involving the stages of preprocessing, global thresholding and segmentation procedure of image processing. The proposed algorithm was tested on the TOFD image acquired in the laboratory condition. According to the result obtained the algorithm developed and applied to TOFD images for segmentation of defects are highly reliable.

Keywords

Time of Flight Diffraction (TOFD), Segmentation, Morphology, Image Processing, Defect Detection, Global Thresholding.

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U. Snekhalatha ¹, M. Anburajan ², B. Venkatraman ³, M. Menaka ³, Baldev Raj ³

Affiliations
1 Department of Biomedical Engineering, SRM University, Kattankulathur, Tamilnadu, IN
2 Biomedical Engineering Department, SRM University, Kattankulathur, Tamilnadu, IN
3 Indra Gandhi Center for Atomic Research, Kalpakkam, Kalpakkam-603102, IN

Abstract

Thermal imaging method is a non invasive, non contact, accurate method for detecting the inflammation in arthritis compared to other diagnostic methods. Thermal imaging plays a crucial role in evaluation and monitoring the inflammation in rheumatoid arthritis .The aim of our study was to evaluate and monitor the inflammatory arthritis in rats by means of skin temperature measurement using thermal imaging technique. 0.2ml of mixture of freunds complete adjuvant mixed with a phosphate buffer saline at 1:1 are injected in right hind limb and forelimb and left limbs are kept for control. Thermal analysis of wistar rats showed that significant increase in mean temperature difference about 0.80c and 0.90c increase in temperature in inflamed right fore limb and hind limb than the left limb controls.

Keywords

Rheumatoid Arthritis, Freunds Complete Adjuvant Skin Temperature Measurement, Thermal Imaging, Wistar Rat.

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L. Praveen ¹, G. Prakash ², K. Malarvizhi ³, S. Kathikeyan ⁴, B. Venkatraman ⁵

Affiliations
1 Production Department, Thiagarajar College of Engineering, IN
2 St Joseph College of Engineering, IN
3 Vel Tech University, IN
4 Mechanical Department, Tyagarajar College of Engineering, IN
5 IGCAR, Kalpakkam, IN

Abstract

Compared with other materials like metals. The non destructive testing of composites is still a relatively immature area. Composite material which are strong and can with stand very high loads but even a small flaw in such parts will lead to catroscopic failure. Defects as voids, dislocation can be detected by thermography technique. The two advanced types of thermography as Lock-in Thermography and Pulsed eddy current stimulated Thermography as to be applied on composites. Where the comparison and experimental result is analyzed based on the inspection of composite materials. Results shows the many calibrated values for different samples of glass fibers which will be help full for inspection for different thickness of composite materials. This paper shows the potential usefulness of the thermal methods.

Keywords

Composite, Lock-In Thermography, Pulsed Thermography, Glass Fibers.

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