Satellite Image Enhancement Using Dual Tree Complex Wavelet Transform

Drawback of losing high frequency components suffers the resolution enhancement. In this project, wavelet domain based image resolution enhancement technique using Dual Tree Complex Wavelet Transform (DT-CWT) is proposed for resolution enhancement of the satellite images. Input images are decomposed by using DT-CWT in this proposed enhancement technique. Inverse DT-CWT is used to generate a new resolution enhanced image from the interpolation of high-frequency sub band images and the input low-resolution image. Intermediate stage has been proposed for estimating the high frequency sub bands to achieve a sharper image. It has been tested on benchmark images from public database. Peak Signal-To-Noise Ratio (PSNR) and visual results show the dominance of the proposed technique over the predictable and state-of-art image resolution enhancement techniques

Modalities of Reconstruction in Oral Malignancy: A prospective study

INTRODUCTION: Carcinoma oral cavity affects 10 million people annually. It is the sixth commonest carcinoma in the world. According to National cancer registry program, Thanjavur district stands at the 11th place for oral cavity carcinoma in males in India. In spite of the easy accessibility for physical examination and biopsy, majority of the patient still remain a challenge for the treating physician. Surgery forms the mainstay of treatment and in most cases with addition of radiotherapy as an adjuvant therapy. The cosmetic, functional and psychosocial results of oral cancer may combine to produce devastating effect on the patient in view of wide range of functions of oral cavity including speech, deglutition, mastication and competence. These patients require a well-planned and well executed reconstructive strategies and extensive rehabilitative management. With the advent of the newer technique like microvascular free tissue transfer and availability of improved biomaterials like Osseointegrated implants, simultaneous reconstruction of defect and ensuring a near normal quality of life has become the standard care instead of previous concept of providing a skin coverage alone. A descriptive study of 40 patients with oral cavity malignancy and reconstructive strategies employed from October 2007 to April 2010 are discussed. AIMS AND OBJECTIVES: 1. To study the demographics of oral cavity reconstruction in our department during the period October 2007- April 2010. 2. To identify the various factors that influences the choice of reconstruction. 3. To analyse the various methods of reconstruction and their outcomes in terms of functionality and aesthetics. MATERIALS AND METHODS: This study is the prospective non randomized descriptive study conducted in the Department of Plastic Surgery, Thanjavur medical college and hospital. • A total of 40 Patients with oral malignancy who were treated in our department from October 2007 to April 2010 were included in the study. • Detailed History, Physical Examination & appropriate investigations were done to arrive at a clinical diagnosis. • Patients with prior histopathological diagnosis were included in the study. Co morbid conditions were thoroughly assessed. • Patients were clinically staged with the help of clinical examinations and staging investigations. • Based on the clinical stage of the disease, treatment and reconstruction was planned for each case in our departmental planning session. Inclusion Criteria: All patients diagnosed with oral malignancy during the study period. Exclusion Criteria: Patients with metastasis, Lesions involving retromolar trigone, Recurrent malignancy, Patients with N3 nodal status were excluded in the study. CONCLUSION: Oral cancer is a national problem. • It remains the challenge as a surgery forms the mainstay of treatment but the reconstruction of post excisional defect as the post excisional defect are complex wound which often requires replacement of lining, skin cover and bone. • With the multimodality management emerging as the treatment of choice, the reconstructive surgeon has to be the part of a team which includes oncosurgeon, radio therapist and oncopathologist. • Commonest age group affected were 50 – 60 years, because of easy accessibility of lesion, a rigorous screening program in these age groups especially those who are at high risk will enable early detection of lesion which would provide better curative and easier reconstructive options. • Tobacco in any form is the major predisposing factor, health education through mass media and posters in health centers in a large scale by Government and Non- Government organizations will create awareness and help in prevention

Satellite Image Compression Based On SPIHT Algorithm

In the domains that deal with a large scale image applications force the use of image compression in order to reduce the required storage. Due to the constrained bandwidth and storage capacity in the field of marine a new compression technique for the compression of the satellite images is proposed here. In our system, we are separating the region of Region of Interest (ROI) part from the original image. And this ROI images can be used for compression scheme by an algorithm known as the Set Partitioning in Hierarchical Trees (SPIHT) algorithm. The SPIHT algorithm is a part of the Lossless compression algorithm. The performance of our method can be done by calculating the PSNR values of the output images

Eigenspace-Based Minimum Variance Combined with Delay Multiply and Sum Beamformer: Application to Linear-Array Photoacoustic Imaging

In Photoacoustic imaging, Delay-and-Sum (DAS) algorithm is the most commonly used beamformer. However, it leads to a low resolution and high level of sidelobes. Delay-Multiply-and-Sum (DMAS) was introduced to provide lower sidelobes compared to DAS. In this paper, to improve the resolution and sidelobes of DMAS, a novel beamformer is introduced using Eigenspace-Based Minimum Variance (EIBMV) method combined with DMAS, namely EIBMV-DMAS. It is shown that expanding the DMAS algebra leads to several terms which can be interpreted as DAS. Using the EIBMV adaptive beamforming instead of the existing DAS (inside the DMAS algebra expansion) is proposed to improve the image quality. EIBMV-DMAS is evaluated numerically and experimentally. It is shown that EIBMV-DMAS outperforms DAS, DMAS and EIBMV in terms of resolution and sidelobes. In particular, at the depth of 11 mm of the experimental images, EIBMV-DMAS results in about 113 dB and 50 dB sidelobe reduction, compared to DMAS and EIBMV, respectively. At the depth of 7 mm, for the experimental images, the quantitative results indicate that EIBMV-DMAS leads to improvement in Signal-to-Noise Ratio (SNR) of about 75% and 34%, compared to DMAS and EIBMV, respectively.Comment: arXiv admin note: substantial text overlap with arXiv:1709.0796

Analysis of impact energy absorption of kevlar and polyester composite impregnated with corn starch shear thickening fluid

Kevlar and polyester (PET) composite structures have been developed through layering by impregnation with optimizedcorn starch shear thickening fluid (CS−STF), prepared using corn starch (CS) and polyethylene glycol (PEG). Corn starchhas been characterized for particle size and distribution through dynamic light scattering. The CS and PEG ratio (40:60,46:54, 52:48 and 58:42) has been studied through fluidity and shear thickening measurements using in-house funnelcollector and electro-mechanical shearing stirrer through ampere measurement studies respectively. Based on the establishedimpact energy calibration curve and energy calculations, the impact energy absorption of CS−STF impregnated fibrecomposites have been studied. The order of layering of the STF in impregnated textile structures has been systematicallystudied for effective impact energy absorption. Shearing studies reveal that at and above shearing time of 3000 μs, shearthickening is found to be prominent for the optimum CS: PEG ratio of 52: 48. Similar trend is also observed in the impactenergy absorption studies of textile structures impregnated with the CS−STF. One layer of kevlar woven fabric followed byone or more layers of PET nonwovens with CS−STF show good performance in impact energy absorption. Similar trend isalso observed in 6, 5 and 4 kevlar layering. It is observed that the presence of more than one layer of kevlar on the top of thenonwovens in the composite does not contribute; rather it decreases the energy absorption. The treated structures show100 % antimicrobial activity by AATCC 100 method and they do not develop smell, while the untreated samples developmicrobes with intense smell

GC-MS ANALYSIS AND IN-VITRO CYTOTOXIC STUDIES OF BIXA ORELLANA SEED EXTRACT AGAINST CANCER CELL LINE

Objective: The present study was carried out to analyze the bioactive component of petroleum ether (PE) extract of Bixa orellana seed and its anticancer potential against B16F-10 melanoma cell line.Methods: The presence of a bioactive component of PE extract was analyzed by GC-MS method. Cell viability was measured using MTT assay. Apoptotic inductive effect of the extract was evaluated by AO/EB staining; DAPI is staining and Annexin V/PI staining. DNA fragmentation analysis of the control and treated cell was carried out by agarose gel electrophoresis and comet assay. In vitro prevention of cell proliferation and migration was further estimated by colony forming assay and wound healing assay respectively.Results: The cytotoxicity of the PE extract against B16F10 melanoma cell was dose and time dependent. The IC50 values for the B16F-10 melanoma cell were 145.98±7.49 µg/ml and 121.60±6.20µg/ml for 24h and 48h respectively. DAPI staining showed DNA fragmentation which was further confirmed by ladder-like appearance of DNA by gel electrophoresis and comet assay. PE extract has prevented the cell proliferation and migration of the treated cancer cell. GC-MS analysis shows the presence of three anticancer compound geranylgeraniol, squalene and beta-sitosterol.Conclusion: The present study established that PE extract of Bixa orellana seed possesses potent anticancer and apoptotic inductive potential which can further be explored in-vivo model for possible cytotoxic activity

Analysis of impact energy absorption of kevlar and polyester composite impregnated with corn starch shear thickening fluid

80-89Kevlar and polyester (PET) composite structures have been developed through layering by impregnation with optimized corn starch shear thickening fluid (CS−STF), prepared using corn starch (CS) and polyethylene glycol (PEG). Corn starch has been characterized for particle size and distribution through dynamic light scattering. The CS and PEG ratio (40:60, 46:54, 52:48 and 58:42) has been studied through fluidity and shear thickening measurements using in-house funnel collector and electro-mechanical shearing stirrer through ampere measurement studies respectively. Based on the established impact energy calibration curve and energy calculations, the impact energy absorption of CS−STF impregnated fibre composites have been studied. The order of layering of the STF in impregnated textile structures has been systematically studied for effective impact energy absorption. Shearing studies reveal that at and above shearing time of 3000 µs, shear thickening is found to be prominent for the optimum CS: PEG ratio of 52: 48. Similar trend is also observed in the impact energy absorption studies of textile structures impregnated with the CS−STF. One layer of kevlar woven fabric followed by one or more layers of PET nonwovens with CS−STF show good performance in impact energy absorption. Similar trend is also observed in 6, 5 and 4 kevlar layering. It is observed that the presence of more than one layer of kevlar on the top of the nonwovens in the composite does not contribute; rather it decreases the energy absorption. The treated structures show 100 % antimicrobial activity by AATCC 100 method and they do not develop smell, while the untreated samples develop microbes with intense smell