Sayısal Görüntü İşleme Teknikleri

(1)

Sayısal Görüntü İşleme Teknikleri

Doç. Dr. Mehmet Serdar Güzel

Slides are mainly adapted from the following course page:

http://www.comp.dit.ie/bmacnamee and

https://www.tutorialspoint.com/dip/

(2)

Lecturer

 Instructor: Assoc. Prof Dr. Mehmet S Güzel

 Office hours: Tuesday, 1:30-2:30pm

 Open door policy – don’t hesitate to stop by!

 Watch the course website

 Assignments, lab tutorials, lecture notes

•

slide

2

(3)

Overlapping fields

Machine/Computer vision

Machine vision or computer vision deals with developing a system in which the input is an image and the output is some information. For example: Face Recognition System

Computer graphics

Computer graphics deals with the formation of images from object models, For example: Object rendering. Generating an image from an object model.

Signal Processing

Signal processing involves image processing. The amount of light reflected by an object in the physical world (3d world) is pass through the lens of the

camera and it becomes a 2d signal and hence result in image formation. This image is then digitized using methods of signal processing and then this

digital image is manipulated in DIP

•

slide

3

(4)

History of Digital Image Processing

 Early 1920s: One of the first applications of digital imaging was in the news-

paper industry

Early digital image

Im a g e s ta ke n f ro m G o n za le z & W o o d s, D ig ita l I m a g e P ro ce ss in g ( 2 0 0 2 )

(5)

History of DIP (cont…)

 Mid to late 1920s: Resulted in higher quality images

 New reproduction processes based on photographic techniques

 Increased number of tones in

reproduced images

Enhanced

digital image 15 tone (level) digital image

Im a g e s ta ke n f ro m G o n za le z & W o o d s, D ig ita l I m a g e P ro ce ss in g ( 2 0 0 2 )

(6)

History of DIP (cont…)

 1990s - Today: The use of digital image processing involves:

 Image enhancement/restoration

 Artistic effects

 Medical imaging

 Industrial examination

 Law execution

 Human computer interfaces

(7)

Image Enhancement

(8)

Examples: Artistic Effects

(9)

Medical Imaging

Im a g e s ta ke n f ro m G o n za le z & W o o d s, D ig ita l I m a g e P ro ce ss in g ( 2 0 0 2 )

(10)

Examples: GIS

 Geographic Information Systems

 Digital image processing techniques are employed widely to manipulate satellite imagery

 Terrain classification

 Meteorology

Im a g e s ta ke n f ro m G o n za le z & W o o d s, D ig ita l I m a g e P ro ce ss in g ( 2 0 0 2 )