Title: MEDICAL IMAGE ENHANCEMENT USING WAVELET TRANSFORMS
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Title: |
MEDICAL IMAGE ENHANCEMENT USING WAVELET TRANSFORMS |
Author Name: |
Yusra Banday, Irfan Pukhta, R. Swaminathan |
Abstract: |
Resolution enhancement in medical images is used to enlarge an adversely affected region. However, the main issue of concern is preserving more details in the enlarged image. This work aims to propose a method for Medical image resolution enhancement based on Non-Decimated Wavelet Transform/Redundant Wavelet Transform/Stationary Wavelet Transform and Discrete Wavelet transform to generate sharp high resolution images with enhanced affected portion.In this method of Image resolution enhancement by using DWT and SWT, one level DWT is employed to decompose the input image into four different sub-band images. The three high frequency sub-bands images which contain the high frequency components of the input image are interpolated by bicubic interpolation. Furthermore, SWT has been employed to minimize information loss due to the down sampling in DWT. Here in this work input image is passed through the unsharp filter before combining with estimated coefficients obtained from DWT and SWT.This is followed by combining all the high frequency sub-band images obtained both from DWT and SWT decomposition to generate new corrected high frequency estimated sub-band images. The input image is passed through unsharp filter and the new corrected, estimated high frequency sub-band images can be interpolated for higher enlargement. Finally, Inverse DWT (IDWT) is applied to create the high resolution image. |
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