Robust Contrast And Resolution Enhancement Of Images Using Multiwavelets And SVD

  ijett-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2013 by IJETT Journal
Volume-4 Issue-7                      
Year of Publication : 2013
Authors : Mr.D.Rakesh , Mr.M.Sreenivasulu , Mr.T.Chakrapani , Mr.K.Sudhakar


Mr.D.Rakesh , Mr.M.Sreenivasulu , Mr.T.Chakrapani , Mr.K.Sudhakar. "Robust Contrast And Resolution Enhancement Of Images Using Multiwavelets And SVD". International Journal of Engineering Trends and Technology (IJETT). V4(7):3216-3221 Jul 2013. ISSN:2231-5381. published by seventh sense research group.


Resolution and contrast are the two important attributes of an image. In this paper we developed a method to enhance the quality of the given image. The enhancement is done both with respect to resolut ion and contrast. The proposed technique uses DWT, SWT and SVD. To increase the resolution, the proposed method uses DWT and SWT. These transforms decompose the given image into four sub - bands, out of which one is of low frequency and the rest are of high frequency. The HF components are interpolated using conventional interpolation techniques. Then we use IDWT to combine the interpolated high frequency and low frequency components. To increase the contrast, we use SVD and DWT. The experimental results sh ow that proposed technique gives good re sults over conventional methods for both colour and gray scale images


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Discrete wavelet transform (DWT), Singular value decomposition (SVD), Stationary wavelet transform (SWT).