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Wavelet-Based Edge Detection Using Local Histogram Analysis in Images
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 Title & Authors
Wavelet-Based Edge Detection Using Local Histogram Analysis in Images
Park, Min-Joon; Kwon, Min-Jun; Kim, Gi-Hun; Shim, Han-Seul; Kim, Dong-Wook; Lim, Dong-Hoon;
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 Abstract
Edge detection in images is an important step in image segmentation and object recognition as preprocessing for image processing. This paper presents a new edge detection using local histogram analysis based on wavelet transform. In this work, the wavelet transform uses three components (horizontal, vertical and diagonal) to find the magnitude of the gradient vector, instead of the conventional approach in which tw components are used. We compare the magnitude of the gradient vector with the threshold that is obtained from a local histogram analysis to conclude that an edge is present or not. Some experimental results for our edge detector with a Sobel, Canny, Scale Multiplication, and Mallat edge detectors on sample images are given and the performances of these edge detectors are compared in terms of quantitative and qualitative measures. Our detector performs better than the other wavelet-based detectors such as Scale Multiplication and Mallat detectors. Our edge detector also preserves a good performance even if the Sobel and Canny detector are sharply low when the images are highly corrupted.
 Keywords
Wavelet;wavelet transform;local histogram analysis;Mallat detector;edge detection;
 Language
Korean
 Cited by
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