hough transform lecture one

7/24/2019 Hough Transform Lecture one

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DIGITAL IMAGE

PROCESSINGWeek 1 - Introduction

A.A. Gde Bagus Ariana, S.T.

[email protected]

http://gungariana.wordpress.com
mailto:[email protected]://gungariana.wordpress.com/http://gungariana.wordpress.com/mailto:[email protected]


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One picture is worth more

than ten thousand words


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References

Pengolahan Citra DigitalDarma Putra

Penerbit Andi Yogyakarta, 2009

Digital Image ProcessingGonzales, Rafael C, Woods, Richard E,

Prentice-Hall Inc., 2002


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What is a digital image?

What is digital image processing?

History of digital image processing State of the art examples of digital image

processing

Key stages in digital image processing

Content


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What is a Digital Image?

A digital image is a representation of a two-

dimensional image as a finite set of digital

values, called picture elements or pixels


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Pixel values typically represent gray levels,

colors, heights, opacities etc

Rememberdigitization implies that a digital

image is an approximation of a real scene

1 pixel

What is a Digital Image?


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Low LevelProcess

Input : Image Output : Image

Example: NoiseRemoval, ImageSharpening,

ImageSmoothing, etc

Mid LevelProcess

Input : Image Output :

Attributes

Example:Object

Recognizing,Segmentation

High LevelProcess

Input:Attributes

Output:

Understanding

Examples:

Sceneunderstanding,autonomousnavigation

What is a Digital Image Processing?


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History of DIP

19601920 1970 1980 ?

The Bartlane cable picture transmission service

Images were transferred by submarine cable between

London and New York and reconstructed at the receiving

end on a telegraph printer

Images of the moon taken

by the Ranger 7probe

Sir Godfrey N.

Hounsfield & Prof. Allan M.

Cormack share the Nobel

Prize in medicine for the

invention of tomography,

the technology behind

Computerised AxialTomography (CAT) scans


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One of the most common uses of DIP

techniques: improve quality, remove noise etc

Examples: Image Enhancement


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Launched in 1990 theHubble telescope cantake images of very

distant objects. However, an incorrect

mirror made many ofHubbles imagesuseless.

Image processingtechniques wereused to fix this.

Examples: The Hubble Telescope
http://en.wikipedia.org/wiki/Image:Hst_sts82.jpg


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Examples: Magnetic Resonance Imaging


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Examples: GIS/Remote Sensing


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Examples: GIS/Remote Sensing


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Examples: Industrial Inspection


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Examples: Law Enforcement


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Examples: Human Computer Interaction


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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression

Key Stages in Digital Image Processing


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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression



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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression



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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression



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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression



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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression



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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression



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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression



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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression



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Image

Acquisition

Image

Restoration

Morphological

Processing

Segmentation

Representation

& Description

ImageEnhancement

Object

Recognition

Problem Domain

Colour Image

Processing

Image

Compression



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We have looked at:

What is a digital image?

What is digital image processing?

History of digital image processing

State of the art examples of digital image

processing

Key stages in digital image processing

Summary


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Question?

hough transform lecture one

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