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APECE-505 Intelligent System Engineering Basics of Digital Image Processing!

APECE-505 Intelligent System Engineering Basics of Digital Image Processing! Md. Atiqur Rahman Ahad. Reference books: – Digital Image Processing, Gonzalez & Woods. - Digital Image Processing, M. Joshi - Computer Vision – a modern approach, Forsyth & Ponce. Topics. Imaging types

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APECE-505 Intelligent System Engineering Basics of Digital Image Processing!

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  1. APECE-505 Intelligent System Engineering Basics of Digital Image Processing! Md. Atiqur Rahman Ahad Reference books: – Digital Image Processing, Gonzalez & Woods. - Digital Image Processing, M. Joshi - Computer Vision – a modern approach, Forsyth & Ponce

  2. Topics • Imaging types • Applications • Illusions

  3. Image: - gazou画像 2-D function – f(x,y) x,y → spatial (plane) coordinates f → intensity/ gray level of the image at that point (x,y) Pixel: - gasou画層 Picture element, image element, pels, pixels

  4. Image: 2D array of gray level or color values • Pixel: Array element Picture Element • It’s 2D • It’s a square • It has one color • It may be any color • Pixel value: Arithmetic value of gray level or color intensity • Gray level image: f = f(x,y) • Color image: f = {Rred(x,y), Ggreen(x,y), Bblue(x,y)}

  5. Principal energy source for images: electromagnetic energy spectrum Image Types: 1. Gamma-ray imaging 2. X-ray imaging - rentogen 3. Imaging in Ultraviolet (UV) bands 4. Imaging in Visible and Infrared (IR) bands 5. In Microwave band 6. In Radio band ~ others ...

  6. 1. Gamma-ray imaging - in nuclear medicine, astronomical observations Bone scan Bone scan PET image PET scan of human brain Positron-emission tomography - PET  Liver metastases of a colorectal tumor are clearly visible within the abdominal region of the image

  7. 2. CT X-ray imaging Chest X-ray CAT – Computerized Axial Tomography Head CT

  8. 3. UV band Normal vs. diseased corn Applications: Lithography Industrial inspection Laser Microscopy Biological imaging

  9. 4. Visible & IR band Microscopy Remote sensing/ GIS

  10. Remote sensing GIS: 地理情報システム (Geographic Information System)

  11. Infra-red (IR) [sekigaisen] imaging USA

  12. IR imaging Bangladesh 日本

  13. Color thermal image

  14. Automated visual inspections Circuit board Lens for eye - damages!!

  15. Visual Spec. – applications Finger print License plate reading

  16. 5. Microwave – Radar

  17. 6. Radio band – medicine and astronomy knee spine MRI – magnetic resonance imaging

  18. Neutron star

  19. ７.Ultrasound imaging! akachan thyroids muscle with lesion millions of pulses & echoes are sent, and received each second

  20. Electron microscopy TEM – Transmission electron microscope SEM – Scanning electron microscope

  21. Simultaneous contrast!

  22. circle!? Optical illusions! No line in the square! Same distance? Parallel?? =?

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