This document discusses various techniques for enhancing images in the spatial domain, which involves direct manipulation of pixel values. It describes point processing techniques like gray-level transformations that map input pixel values to output values using functions like negative, logarithm, power-law, and piecewise linear. Histogram processing techniques are also covered, including histogram equalization, which spreads out the most frequent intensity values in an image. The document provides examples to illustrate the effect of these different enhancement methods.
Image Enhancement: Introduction to Spatial Filters, Low Pass Filter and High Pass Filters. Here Discussed Image Smoothing and Image Sharping, Gaussian Filters
Image processing, Noise, Noise Removal filtersKuppusamy P
Basics of images, Digital Images, Noise, Noise Removal filters
Reference:
Richard Szeliski, Computer Vision: Algorithms and Applications, Springer 2010
Image Enhancement: Introduction to Spatial Filters, Low Pass Filter and High Pass Filters. Here Discussed Image Smoothing and Image Sharping, Gaussian Filters
Image processing, Noise, Noise Removal filtersKuppusamy P
Basics of images, Digital Images, Noise, Noise Removal filters
Reference:
Richard Szeliski, Computer Vision: Algorithms and Applications, Springer 2010
Spatial filtering using image processingAnuj Arora
spatial filtering in image processing (explanation cocept of
mask),lapace filtering and filtering process of image for extract information and reduce noise
WEBINAR ON FUNDAMENTALS OF DIGITAL IMAGE PROCESSING DURING COVID LOCK DOWN by by K.Vijay Anand , Associate Professor, Department of Electronics and Instrumentation Engineering , R.M.K Engineering College, Tamil Nadu , India
Image Restoration And Reconstruction
Mean Filters
Order-Statistic Filters
Spatial Filtering: Mean Filters
Adaptive Filters
Adaptive Mean Filters
Adaptive Median Filters
Edge detection is the name for a set of mathematical methods which aim at identifying points in a digital image at which the image brightness changes sharply or, more formally, has discontinuities.
Spatial filtering using image processingAnuj Arora
spatial filtering in image processing (explanation cocept of
mask),lapace filtering and filtering process of image for extract information and reduce noise
WEBINAR ON FUNDAMENTALS OF DIGITAL IMAGE PROCESSING DURING COVID LOCK DOWN by by K.Vijay Anand , Associate Professor, Department of Electronics and Instrumentation Engineering , R.M.K Engineering College, Tamil Nadu , India
Image Restoration And Reconstruction
Mean Filters
Order-Statistic Filters
Spatial Filtering: Mean Filters
Adaptive Filters
Adaptive Mean Filters
Adaptive Median Filters
Edge detection is the name for a set of mathematical methods which aim at identifying points in a digital image at which the image brightness changes sharply or, more formally, has discontinuities.
This presentation describes briefly about the image enhancement in spatial domain, basic gray level transformation, histogram processing, enhancement using arithmetic/ logical operation, basics of spatial filtering and local enhancements.
COM2304: Intensity Transformation and Spatial Filtering – I (Intensity Transf...Hemantha Kulathilake
At the end of this lesson, you should be able to;
describe spatial domain of the digital image.
recognize the image enhancement techniques.
describe and apply the concept of intensity transformation.
express histograms and histogram processing.
describe image noise.
characterize the types of Noise.
describe concept of image restoration.
Here in the ppt a detailed description of Image Enhancement Techniques is given which includes topics like Basic Gray level Transformations,Histogram Processing.
Enhancement using Arithmetic/Logic Operations.
image averaging and image averaging methods.
Piecewise-Linear Transformation Functions
6th International Conference on Machine Learning & Applications (CMLA 2024)ClaraZara1
6th International Conference on Machine Learning & Applications (CMLA 2024) will provide an excellent international forum for sharing knowledge and results in theory, methodology and applications of on Machine Learning & Applications.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
HEAP SORT ILLUSTRATED WITH HEAPIFY, BUILD HEAP FOR DYNAMIC ARRAYS.
Heap sort is a comparison-based sorting technique based on Binary Heap data structure. It is similar to the selection sort where we first find the minimum element and place the minimum element at the beginning. Repeat the same process for the remaining elements.
2. Principle Objective of
Enhancement
• Process an image so that the result will be
more suitable than the original image for a
specific application.
• The suitableness is up to each application.
• A method which is quite useful for
enhancing an image may not necessarily be
the best approach for enhancing another
images
3. 2 domains
• Spatial Domain : (image plane)
– Techniques are based on direct manipulation of pixels
in an image
• Frequency Domain :
– Techniques are based on modifying the Fourier
transform of an image
• There are some enhancement techniques based
on various combinations of methods from these
two categories.
4. Good images
• For human visual
– The visual evaluation of image quality is a highly
subjective process.
– It is hard to standardize the definition of a good
image.
• For machine perception
– The evaluation task is easier.
– A good image is one which gives the best machine
recognition results.
• A certain amount of trial and error usually is
required before a particular image enhancement
approach is selected.
5. Spatial Domain
• Procedures that operate
directly on pixels.
g(x,y) = T[f(x,y)]
where
– f(x,y) is the input image
– g(x,y) is the processed
image
– T is an operator on f
defined over some
neighborhood of (x,y)
6. Point Processing
• Neighborhood = 1x1 pixel
• g depends on only the value of f at (x,y)
• T = gray level (or intensity or mapping)
transformation function
s = T(r)
• Where
– r = gray level of f(x,y)
– s = gray level of g(x,y)
7. 3 basic gray-level
transformation functions
• Linear function
– Negative and identity
transformations
• Logarithm function
– Log and inverse-log
transformation
• Power-law function
– nth power and nth root
transformations
Input gray level, r
Negative
Log
nth root
Identity
nth power
Inverse Log
8. Identity function
• Output intensities are
identical to input
intensities.
• Is included in the
graph only for
completeness.
Input gray level, r
Negative
Log
nth root
Identity
nth power
Inverse Log
9. Image Negatives
• An image with gray level in the
range [0, L-1]
where L = 2n ; n = 1, 2…
• Negative transformation :
s = L – 1 –r
• Reversing the intensity levels
of an image.
• Suitable for enhancing white
or gray detail embedded in
dark regions of an image,
especially when the black area
dominant in size.
Input gray level, r
Negative
Log
nth root
Identity
nth power
Inverse Log
10. Example of Negative Image
Original image Negative Image : gives a
better vision to analyze
the image
11. Log Transformations
s = c log (1+r)
• c is a constant
and r 0
• Log curve maps a narrow
range of low gray-level
values in the input image
into a wider range of
output levels.
• Used to expand the
values of dark pixels in an
image while compressing
the higher-level values.
Input gray level, r
Negative
Log
nth root
Identity
nth power
Inverse Log
12. Example of Logarithmic Image
Result after apply the log
transformation with c = 1,
range = 0 to 6.2
Fourier Spectrum with
range = 0 to 1.5 x 106
13. Inverse Logarithmic
Transformations
• Do opposite to the Log Transformations
• Used to expand the values of high pixels
in an image while compressing the darker-
level values.
14. Power-Law Transformations
s = cr
• c and are positive
constants
• Power-law curves with
fractional values of map
a narrow range of dark
input values into a wider
range of output values,
with the opposite being
true for higher values of
input levels.
• c = = 1 Identity
function
Input gray level, r
Plots of s = cr for various values of
(c = 1 in all cases)
15. Another example : MRI
(a) a magnetic resonance image of
an upper thoracic human spine
with a fracture dislocation and
spinal cord impingement
– The picture is predominately dark
– An expansion of gray levels are
desirable needs < 1
(b) result after power-law
transformation with = 0.6, c=1
(c) transformation with = 0.4
(best result)
(d) transformation with = 0.3
(under acceptable level)
a b
c d
16. Effect of decreasing gamma
• When the is reduced too much, the
image begins to reduce contrast to the
point where the image started to have very
slight “wash-out” look, especially in the
background
17. Another example
(a) image has a washed-out
appearance, it needs a
compression of gray levels
needs > 1
(b) result after power-law
transformation with = 3.0
(suitable)
(c) transformation with = 4.0
(suitable)
(d) transformation with = 5.0
(high contrast, the image has
areas that are too dark,
some detail is lost)
a b
c d
19. Contrast Stretching
• Produce higher
contrast than the
original by
– darkening the levels
below m in the original
image
– Brightening the levels
above m in the original
image
21. Contrast Stretching
• increase the dynamic range of the
gray levels in the image
• (b) a low-contrast image : result
from poor illumination, lack of
dynamic range in the imaging
sensor, or even wrong setting of a
lens aperture of image acquisition
• (c) result of contrast stretching:
(r1,s1) = (rmin,0) and (r2,s2) =
(rmax,L-1)
• (d) result of thresholding
22. Gray-level slicing
• Highlighting a specific
range of gray levels in an
image
– Display a high value of all
gray levels in the range of
interest and a low value for
all other gray levels
• (a) transformation highlights
range [A,B] of gray level and
reduces all others to a
constant level
• (b) transformation highlights
range [A,B] but preserves all
other levels
23. Bit-plane slicing
• Highlighting the contribution
made to total image
appearance by specific bits
• Suppose each pixel is
represented by 8 bits
• Higher-order bits contain the
majority of the visually
significant data
• Useful for analyzing the
relative importance played
by each bit of the image
Bit-plane 7
(most significant)
Bit-plane 0
(least significant)
One 8-bit byte
24. Example
• The (binary) image for bit-
plane 7 can be obtained
by processing the input
image with a thresholding
gray-level transformation.
– Map all levels between 0
and 127 to 0
– Map all levels between 129
and 255 to 255
An 8-bit fractal image
26. Histogram Processing
• Histogram of a digital image with gray levels in
the range [0,L-1] is a discrete function
h(rk) = nk
• Where
– rk : the kth gray level
– nk : the number of pixels in the image having gray
level rk
– h(rk) : histogram of a digital image with gray levels rk
28. Normalized Histogram
• dividing each of histogram at gray level rk by the
total number of pixels in the image, n
p(rk) = nk / n
• For k = 0,1,…,L-1
• p(rk) gives an estimate of the probability of
occurrence of gray level rk
• The sum of all components of a normalized
histogram is equal to 1
29. Histogram Processing
• Basic for numerous spatial domain
processing techniques
• Used effectively for image enhancement
• Information inherent in histograms also is
useful in image compression and
segmentation
30. Example
rk
h(rk) or p(rk)
Dark image
Bright image
Components of
histogram are
concentrated on the
low side of the gray
scale.
Components of
histogram are
concentrated on the
high side of the gray
scale.
31. Example
Low-contrast image
High-contrast image
histogram is narrow
and centered toward
the middle of the
gray scale
histogram covers broad
range of the gray scale
and the distribution of
pixels is not too far from
uniform, with very few
vertical lines being much
higher than the others
32. Histogram Equalization
• As the low-contrast image’s histogram is narrow
and centered toward the middle of the gray
scale, if we distribute the histogram to a wider
range the quality of the image will be improved.
• We can do it by adjusting the probability density
function of the original histogram of the image so
that the probability spread equally
38. Histogram Matching
(Specification)
• Histogram equalization has a disadvantage
which is that it can generate only one type of
output image.
• With Histogram Specification, we can specify
the shape of the histogram that we wish the
output image to have.
• It doesn’t have to be a uniform histogram
39. Consider the continuous domain
Let pr(r) denote continuous probability density
function of gray-level of input image, r
Let pz(z) denote desired (specified) continuous
probability density function of gray-level of
output image, z
Let s be a random variable with the property
r
r dw
)
w
(
p
)
r
(
T
s
0
Where w is a dummy variable of integration
Histogram equalization
40. Next, we define a random variable z with the property
s = T(r) = G(z)
We can map an input gray level r to output gray level z
thus
s
dt
)
t
(
p
)
z
(
g
z
z
0
Where t is a dummy variable of integration
Histogram equalization
Therefore, z must satisfy the condition
z = G-1(s) = G-1[T(r)]
Assume G-1 exists and satisfies the condition (a) and (b)
41. Procedure Conclusion
1. Obtain the transformation function T(r) by
calculating the histogram equalization of the
input image
2. Obtain the transformation function G(z) by
calculating histogram equalization of the
desired density function
r
r dw
)
w
(
p
)
r
(
T
s
0
s
dt
)
t
(
p
)
z
(
G
z
z
0
42. Procedure Conclusion
3. Obtain the inversed transformation
function G-1
4. Obtain the output image by applying the
processed gray-level from the inversed
transformation function to all the pixels in
the input image
z = G-1(s) = G-1[T(r)]
43. Example
Assume an image has a gray level probability density
function pr(r) as shown.
0 1 2
1
2
Pr(r)
elsewhere
;
0
1
r
;0
2
2r
)
r
(
pr
1
0
r
r dw
)
w
(
p
r
44. Example
We would like to apply the histogram specification with
the desired probability density function pz(z) as shown.
0 1 2
1
2
Pz(z)
z
elsewhere
;
0
1
z
;0
2z
)
z
(
pz
1
0
z
z dw
)
w
(
p
49. Example
Image of Mars moon
Image is dominated by large, dark areas,
resulting in a histogram characterized by
a large concentration of pixels in pixels in
the dark end of the gray scale
50. Image Equalization
Result image
after histogram
equalization
Transformation function
for histogram equalization
Histogram of the result image
The histogram equalization doesn’t make the result image look better than
the original image. Consider the histogram of the result image, the net
effect of this method is to map a very narrow interval of dark pixels into
the upper end of the gray scale of the output image. As a consequence, the
output image is light and has a washed-out appearance.
51. Histogram Equalization
Histogram Specification
Solve the problem
Since the problem with the
transformation function of the
histogram equalization was
caused by a large concentration
of pixels in the original image with
levels near 0
a reasonable approach is to
modify the histogram of that
image so that it does not have
this property
52. Histogram Specification
• (1) the transformation
function G(z) obtained
from
• (2) the inverse
transformation G-1(s)
1
2
1
0
0
L
,...,
,
,
k
s
)
z
(
p
)
z
(
G k
k
i
i
z
k
53. Result image and its histogram
Original image
The output image’s histogram
Notice that the output
histogram’s low end has
shifted right toward the
lighter region of the gray
scale as desired.
After applied
the histogram
equalization
54. Note
• Histogram specification is a trial-and-error
process
• There are no rules for specifying
histograms, and one must resort to
analysis on a case-by-case basis for any
given enhancement task.