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Edges of an image are considered a type of crucial information that can be extracted by applying detectors with different methodology. Edge detection is a basic and important subject in computer vision and image processing In this Paper we discuss several Digital Image Processing Techniques applied in edge feature extraction. Firstly, Linear filtering of Image is done is used to remove noises from...
The incidence of melanoma rises rapidly in Caucasians after the age of 20, and US statistics show about 1 million new cases every year. Specialists in the field are highly accurate in determining whether a skin lesion is cancerous or not based solely on a visual inspection. No systems exist for accurately classifying skin spots. The first stage in the development of such a system is to identify the...
A comparison study of well known edge detection methods (Sobel, Prewitt, Canny, LoG, Zerocross, Roberts) for binary images revealed that these methods have a tendency to distort images, especially under noisy conditions, with some methods exhibiting image distortion even under noiseless conditions. While Sobel, Prewitt, and Canny performed better overall, it was observed that they do not completely...
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