Download - Digital Image Processing (DIP)
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DIGITAL IMAGEPROCESSING
BySrikanth VNV
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SYNOPSIS INTRODUCTIONWHAT IS DIGITAL IMAGEWHAT IS DIGITAL IMAGE PROCESSINGWHY IMAGE PROCESSINGTYPES OF DIPAPPLICATIONS OF DIPCONCLUSION
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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
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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
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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)
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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
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• 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
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• Image-to-image transformations• Image-to-information transformations • Information-to-image transformations
TYPES OF DIP
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TYPES OF DIP EXPLAINEDImage-to-Image transformation
Image-to-Information transformation
Information-to-Image transformation
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STAGES IN IMAGE PROCESSING
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
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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
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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
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G I S•Geographic Information Systems– Digital image processing techniques are used
extensively to manipulate satellite imagery– Terrain classification– Meteorology
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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
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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
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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
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GOOD TO LEARN FROM BOOK
BEETER TO LEARN FROM SOUNDS
BEST TO LEARN FROM IMAGES
FINALLY
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ANY QUERIES???
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