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In the present work, CAS (CaO–Al2O3–SiO2)-based glass–ceramics were prepared by using Al2O3 (Seydişehir, Turkey) and pumice (Nevşehir, Turkey) as natural raw materials and marble dust (Sakarya, Turkey) as a waste source. CAS-coded composition (57.5 mass% SiO2, 27.5 mass% CaO, 15 mass% Al2O3) was selected in stoichiometric anorthite region according to the CAS ternary diagram. According to the DTA...
In recent days biometric features are frequently used in the field of personal identification and authentication. Retinal vessels are important biometric features in this manner. It is suggested a personal identification system used retinal blood vessel topology in this paper. For this purpose, characteristic feature matrix that is extracted by using topological features. The position of these feature...
Computer Aided Diagnosis (CADx) systems have been reached to a large usuage area in recent years. Blood vessels extracted from retinal fundus images provide us important features for diagnosis and treatment of some systematic diseases. These features such as bifurcation and crossover points are mostly used in image registration applications. In this paper, an image registration study is performed...
Some diseases in human body such as diabet could be affect the morphology of the retina. The diagnosis and treatment of these diseases can be made easily by improved computerized techniques. Retinal blood vessel segmentation phase is an important step for diagnosis and treatment. Blood vessel segmentation in color retinal fundus images is employeed in this paper. First, a preprocessing step is performed...
Usage of Computer Aided Diagnostic (CAD) systems is increasing rapidly. Blood vessel segmentation on retinal fundus images could be used as a CAD system for diagnosis of various retinal diseases. In this paper, blood vessels are segmented on retinal fundus images. Firstly, Gabor filter and morphological top-hat transform are applied after preprocessing step in order to enhance blood vessels. Afterward,...
Retinal blood vessel segmentation is a widely used process in diagnosis of various diseases such as diabetic retinopathy, glaucoma and arteriosclerosis. Therefore, an automated tool developed for vessel segmentation could be employed in diagnosis of those illnesses to help ophthalmologists. In this paper, we suggest a method to segment retinal blood vessels automatically. In the method, we apply top-hat...
The analysis of sign language covers different areas such as audio and image processing, pattern recognition, natural language processing that require complex computational processing. These processes required recognizing the sign and audio, plays an important role in development of human-computer interaction. In this paper we focused on automatic lipreading by utilizing visual information in speech...
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