DIGITAL IMAGEPROCESSING

BySrikanth VNV

SYNOPSIS INTRODUCTIONWHAT IS DIGITAL IMAGEWHAT IS DIGITAL IMAGE PROCESSINGWHY IMAGE PROCESSINGTYPES OF DIPAPPLICATIONS OF DIPCONCLUSION

Digital image processing is the use of computer algorithms to perform image processing on digital images

As a subcategory or field of digital signal processing, digital image processing has many advantages over analog image processing.

INTRODUCTION

A digital image is a representation of a two-dimensional image as a finite set of digital values, called picture elements or pixels

Digitization implies that a digital image is an approximation of a real scene

WHAT IS DIGITAL IMAGE

1 pixel

WHAT IS DIGITAL IMAGE(cont…)

Common image formats include:– 1 sample per point (B&W or Grayscale)– 3 samples per point (Red, Green, and Blue)– 4 samples per point (Red, Green, Blue, and

“Alpha”, a.k.a. Opacity)

Digital Image Processing involves• Improvement of pictorial information for human

interpretation• Processing of image data for storage, transmission

and representation for autonomous machine perception

WHAT IS DIGITAL IMAGEPROCESSING

• Since the digital image is “invisible” it must be prepared for viewing on one or more output device (laser printer, monitor etc.)

• The digital image can be optimized for the application by enhancing or altering the appearance of structures within it (based on: body part, diagnostic task, viewing preferences etc.)

• It has vast range of applications in fields of Astronomy, Defense, Research, Forensics etc…

WHY IMAGE PROCESSING

• Image-to-image transformations• Image-to-information transformations • Information-to-image transformations

TYPES OF DIP

TYPES OF DIP EXPLAINEDImage-to-Image transformation

Image-to-Information transformation

Information-to-Image transformation

STAGES IN IMAGE PROCESSING

Image Acquisition

Image Restoration

Morphological Processing

Segmentation

Representation & Description

Image Enhancement

Object Recognition

Problem Domain

Colour Image Processing

Image Compression

APPLICATIONS OF DIPo Medicine

o Security Systems

o Document Processing

o Law Enforcement & Forensics

o Photography

o GIS

o Space exploration and Astronomy

o Video and Film Special Effects

MEDICINE•Take slice from MRI scan of canine heart, and find boundaries between types of tissue– Image with gray levels representing

tissue density– Use a suitable filter to highlight edgesOriginal MRI Image of a Dog Heart Edge Detection Image

G I S•Geographic Information Systems– Digital image processing techniques are used

extensively to manipulate satellite imagery– Terrain classification– Meteorology

LAW ENFORCEMENT•Image processing techniques are used extensively by law enforcers– Number plate

recognition for speed cameras/automated toll systems

– Fingerprint recognition– Enhancement of CCTV

images

SECURITY SYSTEMS

It is used for identifying or verifying a person -In mobile and laptops to unlock them

It is used in security systems - fingerprint, eye detection

Digital image processing allows the use of much more complex algorithms.

Hence it offers both -more sophisticated performance at simple tasks-the implementation of methods which would be impossible by analog means.

CONCLUSION

GOOD TO LEARN FROM BOOK

BEETER TO LEARN FROM SOUNDS

BEST TO LEARN FROM IMAGES

FINALLY

ANY QUERIES???