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Image Processing and Analysis

Image Processing and Analysis. Image Processing. Agenda. Gray-Level Operations Look-up Tables Brightness and Contrast Color Space Operations Frequency Filtering Basic Morphology Particle Filtering and Parameters Gray-Level Morphology. Modifying Gray Values. Gray Level Perception (1).

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Image Processing and Analysis

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  1. Image Processing and Analysis Image Processing

  2. Agenda • Gray-Level Operations • Look-up Tables • Brightness and Contrast • Color Space Operations • Frequency Filtering • Basic Morphology • Particle Filtering and Parameters • Gray-Level Morphology

  3. Modifying Gray Values

  4. Gray Level Perception (1)

  5. Gray Level Perception (2)

  6. Creating LuT (Look-up Tables)

  7. LuT: Linear

  8. LuT: Logarithmic

  9. LuT: Exponential

  10. LuT: Square

  11. LuT: Square Root

  12. LuT: Power x

  13. LuT: Power 1/x

  14. LuT: Equalize

  15. LuT: Inverse

  16. Exercise 4.4

  17. Brightness and Contrast

  18. Exercise 4.5

  19. Color Models: RGB Source: Adobe Technical Guides

  20. Color Models: HSL (HSI) Source: Adobe Technical Guides

  21. Converting RGB to HSL (HSI)

  22. Example: NI Vision Assistant

  23. Example: LabVIEW

  24. Spatial Image Filtering Filter Kernel

  25. Filter Kernel Impact (Smoothing) 97 108 42 58 56 67 73 56 81 50 58 67 75 65 65 New value: 99 50 67 50 16 73 34 34 40 252 255

  26. Filter Kernel Impact

  27. Kernel Families: Smoothing Gaussian Gradient Laplacian Exercise 4.7

  28. Smoothing Filter

  29. Gaussian Filter

  30. Gradient Filter (0) Prewitt Kernel

  31. Gradient Filter (1)

  32. Gradient Filter (4) Prewitt Kernel

  33. Gradient Filter: Sobel Kernel

  34. Laplace Filter (0)

  35. Laplace Filter (1)

  36. Laplace Filter (6)

  37. Laplace Filter (7)

  38. Frequency Filtering

  39. FFT Spectrum (Image)

  40. Exercise 4.8

  41. Standard and Optical Display

  42. FFT Truncate (Low Pass)

  43. Exercise 4.9

  44. FFT Truncate (High Pass)

  45. FFT Attenuate (Low Pass)

  46. FFT Attenuate (High Pass)

  47. Morphology Functions

  48. Thresholding

  49. Erosion

  50. Binary Morphology: Structuring Element

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