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APECE-505 Intelligent System Engineering Basics of Digital Image Processing! Md. Atiqur Rahman Ahad Reference books: – Digital Image Processing, Gonzalez.

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Presentation on theme: "APECE-505 Intelligent System Engineering Basics of Digital Image Processing! Md. Atiqur Rahman Ahad Reference books: – Digital Image Processing, Gonzalez."— Presentation transcript:

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 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 Picture element, image element, pels, pixels

4 Image: 2D array of gray level or color values Pixel: Array element Picture Element Its 2D Its 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 = {R red (x,y), G green (x,y), B blue (x,y)}

5 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... Principal energy source for images: electromagnetic energy spectrum

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

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

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

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

11 Remote sensing GIS: (Geographic Information System)

12 Infra-red (IR) [sekigaisen] imaging USA

13 IR imaging Bangladesh

14 Color thermal image

15 Automated visual inspections Lens for eye - damages!! Circuit board

16 Visual Spec. – applications Finger print License plate reading

17 5. Microwave – Radar

18 6. Radio band – medicine and astronomy MRI – magnetic resonance imaging kneespine

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20 Neutron star

21 .Ultrasound imaging! millions of pulses & echoes are sent, and received each second akachan thyroidsmuscle with lesion

22 Electron microscopy TEM – Transmission electron microscope SEM – Scanning electron microscope

23 Simultaneous contrast!

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


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