final presentation(image enhancement system)
DESCRIPTION
Title: Image Enhancement System. Our project was in MATLAB simulation.. All the work we have done on images... This was our presentation done on our finel viva in International confrence 2013.. thanks honorable Sir Salman AWKUM.. This man helped us much..TRANSCRIPT
Muhammad Hammaad Zubair
Roll Number 30(A)
Nauman Ali Roll Number 41(A)
Project Members
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Project Title
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Image Enhancement System
Image enhancement is the improvement of
digital image quality, This improvement includes filtering of the image and noise removal as well, In which degraded image can be restored
Introduction
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The main theme of this project is to open an
image and then apply the image processing techniques, these techniques may include,
Noise removal filtering Image enhancement
Project Description And Aims
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Definition: Image processing, deals with the
type of signals for which the input is an image and the output is also an image or parameters related to the image. As its name suggest, it deals with the processing on images
Image Processing
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Image Image
Input Output Processing
Analog images:
Analog image processing refers to the alteration of image through electrical meanFor example: Television image
Digital image:Digital image processing refers
processing of the image in digital form (0,1)For example: Digital camera
Types of image processing
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Medical:
X-ray, MRI, CAT etc Google map:
satellite/aerial views of land etc Industry:
inspection of items, products etc Law enforcement:
finger prints etc
Applications of Image Processing
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It can avoid problems such as the building up
of noise and signal distortion during processing
Digital image processing may be modeled in the form of multidimensional system
Digital image processing provide real instant images.
Processing is easy, efficient as more It has good accuracy, small physical cells and
very flexible
Advantages of digital image processing
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Noise is unwanted undesired variations in
pixel intensity values captured or transmitted image, Gaussian noise Speckle noise Salt and pepper noise
Noise
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Gaussian noise
Definition:variations in intensity drawn from a Gaussian normal distribution
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Speckle noise
Definition:Speckle noise is
a granular noise that inherently exists in and degrades the quality of the active radar and synthetic aperture radar images
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SALT AND PEPPER NOISE
Salt and pepper noise is also known as Impulse Noise.This noise can be caused by sharp & sudden disturbances in the image signal, Its appearance is randomly scattered white or black (or both) pixel over the image.
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Filter is the process of removing some
unwanted signals or noise from picture We will apply some filter to remove
background noise from the image Gaussian filter Mean filter Median filter Set filter manually
Filter
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Gaussian Filter
Gaussian filters weigh pixels based on their distance to the Location of convolution
Blurring noise while preserving features of the image
Smoothing the same in all directions More significance to neighboring pixels Gaussian filter removes the Gaussian noise
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Gaussian cont..
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Gaussian cont..
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Gaussian cont..
3x3 mask, Sigma 0.5
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Gaussian cont..
3x3 mask, Sigma 5
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Gaussian cont..
3x3 mask, Sigma 10
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Average Filter
Mean filter How it works
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Mean filter is simple, and easy to implement
method for smoothing imageFor example: reducing the amount of intensity variation between one pixel and the next. It is open used to reduce noise in images
It is linear filter
Average filter Cont..
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Average filter cont..
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Median filter. How it works. Remove salt and pepper noise.
Median Filter
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The median of the pixel value of the window is
computed, and then the center pixel of the window is replaced with the computed median value
The calculation of median is done is first sorting all the pixel value neighborhood (either ascending or descending order) and then replacing the pixel being considered with the middle pixel value
Median filter is non linear
Median filter
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Median Filter cont..
Neighbors of mid value by mask
Arrange all in ascending order
Pick the mid value and replace it with mid of mask
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Median filter cont..
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Median filter cont..
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Project slideshow
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Gaussian Noise
Project slides cont..
Speckle Noise
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Project slides cont..
Salt and Pepper noiseAWKUM
Project slides cont..
Gaussian filter
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Project slides cont..
Median filter
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Project slides cont..
Average filter
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Project slides cont..
Set Filter Manually
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We were working on image processing for
noise reduction system which can be used for image enhancement and removing different types of noise occurred in image while transferring or scanning data.
Future work will be on videos In Sha Allah
Conclusion
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