APECE-505 Intelligent System Engineering Basics of Digital Image

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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 - Applications - Illusions

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

Image: 2 D array of gray level or color values Pixel: Array element • • Picture Element It’s 2 D 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)}

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. . .

1. Gamma-ray imaging - in nuclear medicine, astronomical observations 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