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Digital Image Processing

Digital Image Processing. Plan. What is an image? Mathematical representation of monochromatic images What is a digital image? Digital image processing Fundamental steps Why do we need this?. column. f(x, y). row. y. x. Images. Sample Quantize. Digital Image. y. x. Gray Level.

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Digital Image Processing

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  1. Digital Image Processing

  2. Plan • What is an image? • Mathematical representation of monochromatic images • What is a digital image? • Digital image processing • Fundamental steps • Why do we need this?

  3. column f(x, y) row y x Images Sample Quantize

  4. Digital Image y x Gray Level f(x,y)

  5. Fundamental Steps* Representation & Description Preprocessing Segmentation Knowledge Base Problem Domain Image Acquisition Recognition & Interpretation Result *Rafael C. Gonzalez and Richard E. Woods, Digital Image Processing, Addison-Wesley, 1992

  6. DIP: Details

  7. DIP: Course Logistics http://faculty.petra.ac.id/resmana

  8. Image Preprocessing Restoration Enhancement • Inverse filtering • Wiener filtering Spectral Domain Spatial Domain • Filtering • >>fft2/ifft2 • >>fftshift • Point Processing • >>imadjust • >>histeq • Spatial filtering • >>filter2

  9. Point Processing(Intensity Transformation) s(x,y) = T{ r(x,y)} Transformed Gray Level Original Gray Level Transformation Function >>imadjdemo >>imadjust

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