image restorat on n.
Skip this Video
Loading SlideShow in 5 Seconds..
IMAGE restoratıon PowerPoint Presentation
Download Presentation
IMAGE restoratıon

play fullscreen
1 / 18
Download Presentation

IMAGE restoratıon - PowerPoint PPT Presentation

knox
263 Views
Download Presentation

IMAGE restoratıon

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. IMAGE restoratıon Robot Vision Prof. Dr. Hasan OCAK

  2. Image blur model

  3. Frequency domaın model

  4. INVERSE fılterıng

  5. EXAMPLE: Inverse fılterıng İdeal Bölütleme Original Image Blurred Image Restored with H -1(u, v) Blurred with Gaussian σ = 0.5

  6. EXAMPLE: Inverse fılterıng İdeal Bölütleme Original Image Blurred Image Restored with H -1(u, v) Blurred with Gaussian σ = 1

  7. EXAMPLE: Inverse fılterıng İdeal Bölütleme Original Image Blurred Image Restored with H -1(u, v) Blurred with Gaussian σ = 2 A small amount of noise saturates the inverse filter

  8. Inverse fılterıng

  9. Pseudo Inverse fılterıng • Identify regions where H (u, v) is close to zero and set the inverse filter’s response to zero at those frequencies. • This will help reduce noise amplification.

  10. EXAMPLE: Pseudo Inverse fılterıng

  11. Wıener fılter

  12. EXAMPLE: Wıener fılter

  13. EXAMPLE: Wıener fılter

  14. Wıener fılter response

  15. APPLICATIOn: readıng lıcense plate ALGORITHM: • Rotate image so that blur is horizontal • Estimate length of blur • Compute and apply Wiener filter • Optimize over values of K

  16. APPLICATIOn: readıng lıcense plate

  17. perıodıc noıse reductıon Magnitude Spectrum Original Image Band-reject Filter Restored Image

  18. Bılateral fılter