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Composite materials have beneficial uses in Aerospace, Structural engineering particularly in weight reduction in the finished part. For that reason, harmonic analysis has been the topic of intensive research. This paper aims to carry out an algorithm for natural frequency and deformation of composite plate by vibration signal analysis. The vibration signal is measured using piezoelectric type accelerometer...
Diabetic Retinopathy is an abnormality of eye in which the retina of patient is affected due to an increasing amount of insulin in blood. The symptoms can distort or blur the patient's vision and thus lead blindness. For automatic detection of exudates we first have to differentiate intensity levels of exudate and non-exudate pixels. Matched filter is used for same. Tuning of matched filter is an...
Steel plates are frequently used as structural element in various industries and structures such as bridges, buildings, Metal plates etc. Structural failure may result in a major societal collapse and economical meltdown. Thus to avoid such financial breakdown it is necessary to examine plate structure and its harmonics. In protection of structures it is extremely important to measure the vibration...
A major cause of blindness is diabetic retinopathy, which is found in the people who suffer from diabetes, which can be detected through a screening process. Hard exudates are one of the signs of diabetic retinopathy, which caused due to breakdown of retinal blood vessels. This paper presents a method for classification of hard exudates using 6-Dimensional intensity based features. The exudates and...
Diabetes mellitus is a major disease spread all across the globe. Long-time diabetes mellitus causes the complication in the retina called Diabetic Retinopathy (DR), which results in visual loss and sometimes blindness. In this paper, we discuss a simple and effective algorithm for segmentation of the optic disk (OD) and bright lesions such as hard exudates from color retinal images. Color fundus...
Retinal image registration is a necessary step in diagnosis and monitoring of Diabetes Retinopathy (DR), which is one of the leading causes of blindness. Long term diabetes affects the retinal blood vessels and capillaries eventually causing blindness. This progressive damage to retina and subsequent blindness can be prevented by periodic retinal screening. The extent of damage caused by DR can be...
Registration of aerial images is a necessary step as valuable information for studying; monitoring, forecasting and managing natural resources can be obtained from it. This paper presents an algorithm for registration of aerial images using orthogonal moment invariants. Initially reference aerial image and test aerial image are resized to same size and converted to gray scale and contrast enhancement...
Class quantification of aerial images plays a vital role in remote sensing. One of the class quantification method is discussed in this paper. Proposed method uses Maximum Likelihood Estimation based classifier for class quantification. Algorithm is trained by the sample classes derived from parent image. Feature space is estimated from each training sample. Different classes are labeled in test image...
Retinal blood vessel segmentation is a fundamental step in diagnosis, screening, treatment and evaluation of diabetes retinopathy. Manual segmentation of retinal blood vessels is a long and tedious task and requires trained graders, thus automatic segmentation of retinal blood vessels is a fundamental step in development of computer based diagnostic system for diabetic retinopathy. This paper presents...
Gears are important element in a variety of industrial applications. An unexpected failure of the gear may cause significant economic losses. For that reason, fault diagnosis in gears has been the subject of intensive research. Vibration signal analysis has been widely used in the fault detection of rotation machinery. This paper present a gear tooth fault diagnosis technique of Autoregressive (AR)...
Registration of retinal images provided by different modalities is required to facilitate diagnosis of the retina specifically in context with Diabetes Retinopathy (DR). Temporal registration is necessary in order to follow the various stages DR, whereas multimodal registration allows us to improve the identification of some lesions or to compare pieces of information gathered from different sources...
This paper presents method of retinal image compression using filter bank which is build with non symmetric filters. A method for deriving symmetric filters is also illustrated in detail. We also overview the basics of filter bank and perfect reconstruction conditions associated with it. The effect of number of decimating and interpolating stages on compressibility of proposed filter banks is also...
Condition monitoring has significant importance in manufacturing industry. Avoiding production loss and minimizing the probability of occurance of calamitous machine failure, based on updated information acquired from machine status on-line is the aim of condition monitoring. This paper discusses various vibration signal analysis techniques. The experimentation has been carried out using a mechanical...
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