DIGITAL IMAGE PROCESSING
The images used in this presentation can be found here:
What is Digital Image Processing?
Digital Image:
A representation of a two-dimensional image as a finite set of digital values, called picture elements or pixels. f(x, y)
Where x, y are spatial coordinates
f(x, y) = i(x,y) * r(x,y)
�f(x, y): Intensity at given point (x, y)�i(x, y): Illumination at (x, y)�r(x, y): Reflectance/ Transmissivity at (x, y)
M XN representation of f
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Image Acquisition Process
Pixel & Digitization
Pixels are the elements of a digital image that typically represent gray levels, colours, heights, opacities.
Digitization implies that a digital image is an approximation of a real scene in the numerical matrices form
Digital Image
Common digital image formats include
What is Digital Image Processing?
Digital Image Processing:
Processing digital images by means of a computer.
An image processing operation typically defines a new image g in terms of an existing image f.
We can transform either the range of f.
Or the domain of f:
Why Digital Image Processing?
- Improvement of pictorial information for human interpretation
Where image processing ends, fields such as image analysis and computer vision start.
The continuum from image processing to computer vision is broken down into:
Low – Level:
Inputs and outputs are images
Ex: Noise Removal, Image Sharpening
Mid – Level:
Outputs are the attributes extracted from input images
Ex: Object Recognition, Image Segmentation
High – Level:
An ensemble of recognition of individual objects
Ex: Scene Understanding, Autonomous Navigation
For more details about each of the steps in the next set of slides refer this article:�https://medium.com/futframe-ai/fundamental-steps-of-digital-image-processing-d7518d6bb23c
Key Stages in Digital Image Processing
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
KEY STAGES IN DIGITAL IMAGE PROCESSING: IMAGE ACQUISITION �
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
KEY STAGES IN DIGITAL IMAGE PROCESSING: IMAGE ENHANCEMENT �
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
KEY STAGES IN DIGITAL IMAGE PROCESSING: IMAGE RESTORATION �
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
KEY STAGES IN DIGITAL IMAGE PROCESSING: MORPHOLOGICAL PROCESSING
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
KEY STAGES IN DIGITAL IMAGE PROCESSING: SEGMENTATION
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
KEY STAGES IN DIGITAL IMAGE PROCESSING: OBJECT RECOGNITION
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
KEY STAGES IN DIGITAL IMAGE PROCESSING: REPRESENTATION
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
KEY STAGES IN DIGITAL IMAGE PROCESSING: COMPRESSION
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
KEY STAGES IN DIGITAL IMAGE PROCESSING: COLOUR PROCESSING
Image Acquisition
Image Restoration
Morphological Processing
Segmentation
Representation & Description
Image Enhancement
Object Recognition
Problem Domain
Colour Image Processing
Image Compression
APPLICATIONS
THANK YOU�Banu Prakash