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Advanced Image Deblurring Techniques for Image Restoration

Explore the concepts of Fourier Transform, Fast Fourier Transform, and Logarithmic Transform for image deblurring. Learn to enhance image quality by transforming spatial domain to frequency domain effectively.

marymccormick
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Advanced Image Deblurring Techniques for Image Restoration

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Presentation Transcript

  1. Image Deblurring Techniques Kang Guo TJHSST Computer Systems Lab 2009-2010

  2. Image Blur • Common cause of image quality degradation in photography • Removing blur from images is a practical application

  3. Fourier Transform • Spatial domain to Frequency domain • N, N^2 transforms • Imaginary numbers, displayed with magnitude • Given a+bi, √(a^2+b^2) • e^(iӨ) = cos(Ө)+isin(Ө)

  4. Fast Fourier Transform • Speed improvement • 2N, N transforms • 2 components

  5. Logarithmic Transform • Fit all values within the range of 8-bit color values Image without the logarithmic transform

  6. Results Original Image Fourier Transformed Image

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