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Digital Image Compression Using Discrete Wavelet Transform and Discrete Cosine Transform

Digital Image Compression Using Discrete Wavelet Transform and Discrete Cosine Transform

          
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About the Book

The fast development of multimedia computing has led to the demand of using digital images. The manipulation, storage and transmission of images in their raw form is very expensive, and significantly slows the transmission and make storage costly. Efficient image compression solutions are becoming critical with the recent growth of data intensive, multimedia based applications. Many techniques are now available and much effort is being expended in determining the optimum compression transforms. Compression is done using Cosine and Wavelet Transforms. Recently compression techniques using Wavelet Transform (WT) have received great attention, because of their promising compression ratio, ability to analyze the temporal and spectral properties of image signals and flexibility in representing non stationary signals like speech and images by taking into account human perception system. In this paper we describe the application of Discrete Wavelet Transform (DWT) for analysis, processing and compression of multimedia signals like speech and image. More specifically we explore the major issues concerning the wavelet based image compression which include choosing optimal wavelet, decomposition levels and thresholding criteria. The simulation results prove the effectiveness of DWT based techniques in attaining an efficient compression ratio of 2.67 for images, achieving higher signal to noise ratio (SNR), better peak signal to noise ratio (PSNR), while the retained signal energy is 99.9885% and the resulting signals are generally much smoother. A comparison between Discrete Cosine Transforms (DCT) and discrete wavelet transform is done finally.


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Product Details
  • ISBN-13: 9798701091656
  • Publisher: Independently Published
  • Publisher Imprint: Independently Published
  • Height: 229 mm
  • No of Pages: 64
  • Spine Width: 3 mm
  • Width: 152 mm
  • ISBN-10: 8701091654
  • Publisher Date: 27 Jan 2021
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 100 gr


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