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2015 | Vol. 52 | 90--99
Tytuł artykułu

Edge Detection in Ultrasound Images Based on Modified Unsharp and Wavelet Transform Filters

Wybrane pełne teksty z tego czasopisma
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Some image processing applications like segmentation need effective techniques that work as edge detection and extraction, many filters in this field fail to achieve the desired result and consequently the further processing fails, so it is needed sometimes to modify a technique to work in robust and effective way. In ultrasound, although it is a common and real-time non-destructive test methods, but processing and analyzing such images require special filters and modifications to overcome some weakness sides in this field, especially when scanning objects comparable to the acoustic wavelength. In this paper, two modified filters were suggested, first one is two-step unsharp filter, in this techniques the image was enhanced twice the first time the edges that extracted from the original scaled image where added back to the image, and in the second time the same edges were added to the scaled enhanced image. The second technique is summarized as adding back the Low-High and High-Low bands that were extracted previously from the original image by Haar wavelet transform to the image which reinforce its edges. Some image processing applications like segmentation need effective techniques that work as edge detection and extraction, many filters in this field fail to achieve the desired result and consequently the further processing fails, so it is needed sometimes to modify a technique to work in robust and effective way. In ultrasound, although it is a common and real-time non-destructive test methods, but processing and analyzing such images require special filters and modifications to overcome some weakness sides in this field, especially when scanning objects comparable to the acoustic wavelength. In this paper, two modified filters were suggested, first one is two-step unsharp filter, in this techniques the image was enhanced twice the first time the edges that extracted from the original scaled image where added back to the image, and in the second time the same edges were added to the scaled enhanced image. The second technique is summarized as adding back the Low-High and High-Low bands that were extracted previously from the original image by Haar wavelet transform to the image which reinforce its edges.
Wydawca

Rocznik
Tom
Strony
90--99
Opis fizyczny
Bibliogr. 4 poz., rys., zdj.
Twórcy
  • University of Technology, Iraqi
autor
  • University of Technology, Iraqi
autor
Bibliografia
  • [1] OGE MARQUES, (2011), "Practical Image And Video Processing Using MATLAB®".
  • [2] Solomon C., Berckon T.,(2011), "Fundamentals of Digital Image Processing A Practical Approach with Examples in Matlab".
  • [3] Po-Yueh Chen and Hung-Ju Lin,International Journal of Applied Science and Engineering,2006, "A DWT Based Approach for Image Steganography"
  • [4] Dušan Heric , Damjan Zazula,Image and Vision Computing 25 (2007) 652–662, SienceDirect, "Combined edge detection using wavelet transform and signal registration".
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-d12eb7e1-567c-4c0b-9145-7a8f8ebccc5c
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