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Edge Detection of Radar Image using Discarding Wavelet Transform | ||
| Tikrit Journal of Pure Science | ||
| Article 1, Volume 15, Issue 1, 2010, Pages 320-327 | ||
| Author | ||
| Hather Ibraheem Abed AL-Jobury | ||
| Abstract | ||
| In this research we found out a new method for edge detection based on orthogonal wavelet transform .This method is based on several stages . In the first stage, the image decomposed into approximation coefficients and detail coefficients which consist of horizontal details (horizontal edges),vertical details(vertical edges) ,and diagonal details(diagonal edges which is corrupted by multiplicative noise).In the second stage, the image constructed by several stages, first discarded the approximation coefficients, second removed the multiplicative noise by several stages, first transformed logarithmically the diagonal details (transformed multiplicative noise to additive),second applied the median filter to correct the diagonal edges for the multiplicative noise . third transformed exponentially the diagonal edges using exponential transform . So , the steps of new method for edge detection applied on all decomposition levels. The performance is me seared quantitantially by using ratio between signal value to the mean square error(S/MSE) and the results has proved the superiority of suggested method(Edge Detection of Radar Image using Discarding Wavelet Transform),especially in the third decomposition level. | ||
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