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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???
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