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2022 5th International Conference on Contemporary Computing and Informatics (IC3I)
271
979-8-3503-9826-7/22/$31.00 ©2022 IEEE
Skin Cancer Prediction using Machine Learning and
Neural Networks
Dr. Neha Tyagi
Associate Professor
Department of CSE
Amity University
Greater Noida
Uttar Pradesh, India.
nehacs1988@gmail.com
Dr. Bhasker Pant
Professor Department of Computer
Science & Engineering
Graphic Era Deemed to be University
Dehradun, Uttarakhand, India.
bhasker.pant@geu.ac.in
Dr. Logeshwari Dhavamani
Associate Professor
Department of Information Technology
St. Joseph’s College of Engineering
Chennai, India.
logeshgd@gmail.com
Mr. Dilip Kumar Jang Bahadur Saini
Assistant Professor
Department of Computer Science and
Engineering
Himalayan School of Science and
Technology
Swami Rama Himalayan University
Swami Ram Nagar, Jolly Grant
Dehradun, Uttarakhand, India
dilipsaini@gmail.com
Dr. Mohammed Saleh Al Ansari
Associate Professor
Department of Chemical Engineering
College of Engineering
University of Bahrain
Bahrain, UAE.
Malansari.uob@gmail.com
Joshuva Arockia Dhanraj
Department of Automation and Robotics
(ANRO)
Department of Mechatronics Engineering
Hindustan Institute of Technology and
Science
Padur, Chennai, India
joshuva1991@gmail.com
Abstract—
The apparent similarities between skin
conditions have made medical diagnosis difficult. Although
melanoma is the most well-known type of skin cancer, other
diseases have recently been responsible for a large number of
fatalities. One of the biggest challenges in creating a
dependable automatic categorization system is the absence of
massive data. A deep learning (DL) system for identifying skin
cancer is presented in this paper. The rapid development rate
of melanoma skin cancer, its massive price of surgery, and its
mortality rate have all heightened the need for timely
diagnosis of skin disease. Most of the time, treating cancer
cells requires time and careful detection. The commitment to
deep learning powered by machine learning (ML) has been
repeatedly shown in the medical sector. Skin cancer
categorization has benefited significantly from growing study
attention since it is amenable to visual pattern recognition.
Studies have revealed that DL-based image classifications
may be utilised to enhance skin cancer diagnosis or are on par
with or even outperform human specialists. In this study, we
provide a deep learning architecture that can identify skin
cancer. Five state-of-the-art convolutional neural networks
were trained using transfer learning to provide a simple
classifier and a hierarchical (with two stages) classification
that can differentiate between seven different species of moles.
Experiments were conducted using data from the HAM10000
database, a huge collection of dermatoscopic pictures, with
the use of data augmentation methods to boost results. The
DenseNet201 network performed well in this experiment, as
seen by the high classification accuracies and F-measures
achieved with very few false negatives. The simple model
outperformed the 2-levels model, with the best result coming
from the first level, or a binary classification between nevi and
non-nevi.
Index Terms— Deep Learning, Medical, cancer, Machine
Learning (ML), Neural Network, Melanoma.
I. INTRODUCTION
"Convolutional neural networks (CNNs)", the
fundamental component to most various DL-based image
classifications, have been continuously improved, and this
achievement can in part be credited to them. Furthermore,
despite their allegedly comprehensive effectiveness, CNN-
related image classifications have broader problems,
including the ability to learn erroneous correlations,
sensitivity to slight picture alterations, and adversarial
weaknesses. A common underlying issue behind several of
these errors is shortcut learning. Correlated in spite of
meaningless properties which exist in reliable data set have
been typically learned by the classifier, as opposed to learning
reliable decision criteria that classify to "out-of-sample
(OOS)" information, for example real physical features of
nevi as well as melanomas (i.e. shortcuts). This frequently
leads to non-generalizable and weak classifiers [1]. Even if
the picture alterations are just slight, these classifiers
typically perform well on assessing information which is
comparable with the training derived data but poorly or fail
on OOS data. (For instance, minor picture rotations or
brightness changes).
Naturally, classifiers of skin cancer also display possible
signs of accelerated learning, like the acquisition of artefacts,
antipathetic weaknesses, and normal brittleness. Therefore,
OOS testing of classifiers of skin cancer ought to become
commonplace. OOD testing is undoubtedly feasible provided
the range of thermoscopic information. Though this
information come from many sores and ostensibly show wide
range of image creating modalities, they could not
significantly test classifiers [2]. For instance, the well-known
ImageNet data set has undergone several adjustments to
evaluate a reaction of classifiers to significant shifts of
distribution in general object recognition. Such difficult test
sets are till now lacking in the dermatology, though
II. LITERATURE REVIEW
2022 5th International Conference on Contemporary Computing and Informatics (IC3I) | 979-8-3503-9826-7/22/$31.00 ©2022 IEEE | DOI: 10.1109/IC3I56241.2022.10073141
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2022 5th International Conference on Contemporary Computing and Informatics (IC3I)
272
One of the most common cancers detected in the US is
malignant melanoma. The most serious form of skin cancer,
melanoma, has recently emerged as one of the biggest
problems facing the public health system. 2018 is expected to
see 91270 new instances of melanoma identified in the
United States, based on the most recent figures. Over the
coming decades, it is anticipated that both the prevalence of
melanoma and the mortality it causes will increase.
According to a recent analysis, the yearly rise in new
melanoma case diagnoses from 2008 to 2018 was 53%.
Survival statistics for this form of cancer are quite
encouraging if it can be detected early on and treated
appropriately [3]. If not, a patient's expected 5-year survival
rate will drop from 99% to 14%. Between 1994 and 2014,
there was a sharp rise in the detection of new instances of
non-melanoma cancer, up to 77%. The most prevalent non-
melanoma skin cancer, basal cell carcinoma, claims the lives
of 3000 individuals annually.
Without using any picture preparation techniques, deep
learning has been used to tackle exceedingly complicated
categorization and segmentation problems. In order to
comprehend the various lesions, design of these networksis
majorly built on different kinds of convolutional layers,
which analyse as well as retrieve key characteristics from the
pictures. For instance, several modalities of pictures have
been utilised to discover the characteristics that identify
dementia patients [4]. Known as "Convolutional Neural
Networks (CNNs)", they have been extensively utilised and
exhibit excellent performance in the analysis of images and
videos. Today's CNN's take advantage of GPU computing
power to do a high number of operations in a matter of
seconds, processing huge datasets to build a solid model for
use in object identification and segmentation, decision
support systems, and picture classification. Concentrating on
diagnostic imaging, deep networks have demonstrated
excellent effectiveness in medical image processing with the
growth of publicly available resources [5]. In ultrasonic
elastography, neural networks were previously provided with
additional, confidential information to do strain
reconstructing. Deep learning methods have also been used
to interpret blood circulation from angiographies and identify
vessel boundaries. There is always a need for improvement,
however, new efforts in the classification of skin lesions have
been presented [6]. Due to the two-stage methodology used
in this research, deep networks may be used to segment data,
extract characteristics, and then predict outcomes.
Additionally, the majority of them concentrate on the two
classes that are troublesome, and other skin disorders are
typically lumped together into one class rather than being
categorised. This research aims to automate the classification
of various mole categories without the need for human
interaction. The usage of deep learning networks in an end-
to-end solution that the user will already have learned without
the requirement for parameter adjustment to identify skin
conditions is presented [7, 8]. In this study, transfer learning
is used to assess how well state-of-the-art previously trained
deep networks identify melanoma. In this area, the renowned
HAM10000 dataset—is widely used as a training reference
standard for dermatology utilized for the trials. And over half
of the photos in this dataset, which has more than 10,000
images divided over seven classes, corresponding to the nevi
class, making the classification assignment more difficult.
The functionality of convolutional neural networks has
evolved enough to enable the creation of automated non-
assisted algorithms that are utilised in various sectors, such as
surveillance footage or automated vehicles, and they have
evolved into crucial tools for object detection, categorization,
and identification. Due to the technological constraints of the
pictures, there are several jobs performed by radiologists and
clinicians in the field of medical imaging that require
assistance to enhance their diagnosis [9]. The purpose of this
research is to leverage the strength of deep learning with
photos to help doctors identify and categorise melanoma.
Machine learning algorithms' primary presumption is that
data must have shared properties and a comparable
distribution. Therefore, deep learning techniques suffer when
heterogeneity appears and must be modified and retrained
from scratch using new additional datasets [10].
Although, in most cases, this technique is not feasible
because of a lack of resources, including the availability of
images or a sufficient budget to cover the costs. In certain
circumstances, the well-known method of transfer learning is
useful, enabling one to retrain an existing effective model to
customise it to a particular issue. A mix of two well-known
deep networks called Inception-ResNetV2 aims to gain from
Reset’s leftover connections by speeding up the Inception
network's training [11]. To expand the multidimensional
created by the Inception block and then before implementing
the characterizations, specifically, more basic Inception
blocks than just the actual one is utilised. This 164-layer
"convolutional neural network" was introduced at the 2015
ILSVRC assignment with the goal of enhancing the efficiency
of the ILSVRC 2012 categorization job. In contrast to the
earlier networks, MobileNetV2 is a transportable neural
network that is geared for a variety of tasks and standards
while being tailored for resource-constrained contexts. The
inverted residual along with a linear bottleneck, a method
which gets rid of non-linearities while maintaining power of
representation, is the fundamental innovation of this network.
The MobileNetV2 infrastructure consists of totally 53 layers,
the first of which is complete convolution layer and is
implemented by 19 residual bottleneck levels. The network
uses an expansion rate that is constant. Datasets from
ImageNet, COCO, and VOC were used to test the models
III. RESEARCH METHODOLOGY
The methodical inquiry and analysis of sources and
methods to gather findings and draw new conclusions can be
summed up as research. Research technique, which has been
defined as a method to methodically address the research
issue, dictates how such an inquiry will be conducted. Study
of all kinds is primarily founded on a set of underlying
assumptions about what makes research study, so it is
essential to apply the right technique to accomplish research
goals to assure the validity of the results. There is no one
methodology that works for all research and find; rather, the
technique must be chosen depending on the nature, extent, and
type of data that are relevant to the research question.
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2022 5th International Conference on Contemporary Computing and Informatics (IC3I)
273
Secondary and empirical analysis has been done based on
research topic to perform the analysis section.
IV. DATA ANALYSIS AND DATA AUGMENTATION
The actual outcomes and evaluation of the suggested
methodologies have been done using the HAM10000 dataset,
which is freely accessible. 10,050 dermoscopic pictures from
seven distinct classes—"actinic keratosis (akiec)”, “benign
keratosis (bkl)”, “nevi (nv)”, “melanoma (mel)”, “basal cell
carcinoma (bcc)”, “dermatofibroma (df)’ and“vascular
skin"—make up the HAM10000 collection (vasc).
Regardless of the number of categorization difficulties, this
dataset has been regularly utilised as a baseline for comparing
people and robots. The 10,015 dermoscopic photos were
gathered more than20 years from dermatology department in
the "Medical University of Vienna (Austria)" as well as skin
cancer clinic of "Cliff Rosendahl in Queensland (Australia)".
Unequal distribution of the information is this dataset's first
significant flaw. The nevi class has over 7000 photos, whilst
the other classes only have 1000 or so. This could prompt the
network to focus on photos of benign keratoses and other
conditions that resemble nevi. There are also few
photographs of dermatofibromas or vascular skin. Because
there are significantly fewer photographs in the test set than
in other classes, it is important to carefully assess how the test
set performed [12]. Therefore, the skewed dispersion in the
training stage must be balanced by the application of
augmentation techniques. This data augmentation, which was
used throughout the training phase, was carried out utilising
various revolutions and reflections of the original pictures.
The selected “data augmentation method” were explored in
the following:
• Flipping horizontally with a 0.5 probability.
• A further likelihood of 0.5 for vertical flipping.
• Rotations of images with a frequency of 0.75 and an
arbitrary angle between [90, 90].
The 7:1 proportion between nevi as well as other skin
lesions can be mitigated but not eliminated by data
augmentation. In order to enhance the categorization of the
non-nevi pictures, the 2-stages model was applied after the
dataset was initially balanced.
Figure 1: “Class distribution of the HAM10000 dataset”
(Source: [12])
Analysis of linear regression has been utilised to detect
the main causes related to skin cancer. A basic regression
consists of a predictor variable as well as a responder
variable. Analysis of multiple regression consists of a
predictor variable and several independent factors. Following
is the formulation.
(1)
Wherein, ,..., are the relevant factors and y is the
dependent variable. ε is the stochastic error element, and
is the coefficient of determination. The y intercept is .
Regression measures including error of absolute mean,
error in root mean square, “relative square error”, “relative
absolute error” and determination coefficient. To determine
how closely forecasted results match actual outcomes, the
MAE measure is frequently used. RMSE may be used to
analyse systems with errors that have been calculated in
similar units [13]. “Relative absolute error” may be used to
compare modelling whose defects are assessed over many
units. Error in root square can be compared between diverse
models whose errors have been expressed in different units.
CD provides a summary of the empirical analysis of linear
regression. All those mentioned errors have been calculated
with this formula:
(2)
wherein is the real value and is the prognosis
! (3)
!
"
! (4)
where " is the mean of
!
! (5)
Coefficient of Determination,
##$
##% & ##'
##% (6)
Sum of Squares Regression
"
( (7)
Sum of Squares Total,
) "
(8)
Sum of Squares Error
(9)
The Two Class Neural Network Unit makes skin cancer
predictions possible. This unit can be used to predict a goal
with just two potential values. The NN network consists of
13 inputs, 1 convolution layer, and 1 output. The error in
mean squares utilised to assess the model's performance
(MSE). MSE has been measured using Eq. (10). The MSE is
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2022 5th International Conference on Contemporary Computing and Informatics (IC3I)
274
low when the NN model is doing well. NN model employs a
hidden layer comprising an MSE of 0.2675.
*+, ,-./0
1
2
, (10)
Where P is the number of components in the outcome
that possess it.
The quantity of observation is N.
The intended outputs are +,
The real outputs are ,
The options for the Train Model Module include learning
algorithm 0.1, training iterations 100, learning basics
weighting 0.1, as well as normalizer type (min-max).
Every attribute is linearly rescaled to [0, 1] range by the
“min-max normalizer”. Eq. (11) is used to compute the
expectation maximization normalizer.
3 456784
95:;456784< (11)
It is feasible to predict a class-wide outcome as well as
the chance that it will occur using the Score Model Module.
In this area, score labels and score options are shown. The
Scored Likelihoods show that the likelihood of getting skin
cancer rises the closer researchers get to zero. Contrarily, as
scientists get closer to one, the probability of skin cancer
declines. The reliability, specificity, recall, and F1 measure
of the NN model for true positives (TP) and false positives
(FP), true negatives (TN), along with false negatives have
been shown in the Assessment of Model Module (FN). The
data clearly show that TP. The numbers for FP are recognised
incorrectly. The dataset appropriately excludes TN [14, 15,
16]. FN is incorrectly ignored as data. Out of all the accurate
projections, 0.978 are accurate. Performance of NN model is
totally based on precision. The accuracy rate of positively
identified instances is 0.962. 1,000 correctly identified real
positive instances are considered to be a recall. The F1 score's
accuracy and recall averages are 0.981 on a harmonised basis.
The precision, correctness, recall, along with F1 score have
been calculated using Equations (12), (13), (14), and (15).
==>?@= %2A%1
%2A%1AB2AB1 (12)
0?C=DEDFG %2
%2AB1 (13)
C=@HH %2
%2AB1 (14)
I& E=F?C %2
%2AB2AB1 (15)
The main concept is for changing the input value of x ϵ
R1 within a regressive projection onto a high m-dimensional
feature set The SVM then identifies the optimal linear
separation hyperplane in the training dataset, which is
associated with a collection of "vector support points” [17].
A "kernel function" determines the conversion ((x)). SVM
employs the "sequential minimal optimization" studying
technique, which employs the widely used "Gaussian kernel”,
which has fewer variables than various other kernels (such as
polynomial):
“K(X, X’) = exp (-γX – X’2) , γ>0”, Two hyper-
parameters influence the performance of the classifier: γ, C is
a penalty component, while K is a kernel criterion. Below is
the conditional SVM outcome:
F(xi) = J8KJ8L8JMDN
O
, (16)
“P(i) = 1/ (1+ exp (Af (xi) + B))” (17)
Whereas” denotes the exact number of authentic
"support vectors", “YiP { -1, 1}” seems to be the binary
classifier outcome, b similarly KJ88seem to be the model's
components, and A and B are model parameters, and they're
obtained by addressing a regularised supervised classification
issue. Whenever “Nc>2”, The method called “one-against
one” is employed, that involves training “Nc (Nc -1)/2”
nearest neighbour coupling to provide the output for the
classification algorithm [20].
A. Sensitivity analysis
The susceptibility assessment is a basic process that
assesses the system behaviours when a particular input is
altered after the development operation. Let Ya.jwith the
exception of the output produced through maintaining
various input parameters at average numbers Xa, that changes
during the course of its full range “(Xa.j, with jP
{1,2,…………..L} levels”. “Variation (Va) of Ya.j” as a
measurement of input significance, is employed. If Nc>2
(multiclass), the total of deviations for every outcome class
probability is calculated. (p© a.j). A lot of variation (Va) shows
high level of Xa as a result, the input's proportional
significance (Ra) is provided through:
Ra= Va/ QD R&SS8T
(
(18)
The "variable effect characteristic (VEC)" curve has now
been developed for a more precise examination, which
depicts the Xa.j characteristics (x axis) against the Ya.j
projections (y axis).
B. “Measurement of performance evolution”
1) “Classification accuracy (ACC)”
The capacity of the algorithm to properly anticipate class
levels of new along with previously unknown data is referred
to as classification results. The proportion (percentage) of
assessment collection samples successfully categorised by
the classification is known as classification results [18]. The
accuracy level can be used to evaluate categorization
performance. That is
“Accuracy (T) = @EECEEU
)V
%
, tiP T (19)
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2022 5th International Conference on Contemporary Computing and Informatics (IC3I)
275
such that T is considered as the data set that must be
categorised (the sample set in this case), “t P T, t.c” seems to
be the object's category “t” consequently “classify (t)”
providing the categorization of t through the classification
that was utilised (here, SVM and MLPE)”.
The performance development assessment in this section
is mostly dependent on the classification results provided in
Equations (18) and (19).
V. CONCLUSION
Artificial intelligence is making headway swiftly in the
field of dermatology. It can revolutionize clinical outcomes,
particularly by improving the sensitivity and precision of
detection for skin lesions, particularly cancer. However,
medical, and photographic datasets of all skin types are
needed for AI research, and this can only be acquired through
increased global skin imaging coordination. It is necessary to
record the hypersensitivity, specificities, and effectiveness in
future research and in actual environments. AI is not a danger
to dermatologists' knowledge; instead, in the next decades, it
may be employed to enhance clinical practise. If practising
dermatologists have a greater knowledge of AI concepts, they
can get success by delivering reliable skin care. Protecting
health information, having access to huge databases, and
retraining the AI algorithms to improve diagnostic accuracy
are some of the hurdles in implementing AI for the
identification of skin cancer. In this current study, a
Convolutional Neural Networks-based method for
classifying melanoma has been suggested. A method is being
developed to assist individuals and medical professionals in
the detection or classification of benign or malignant skin
cancer types. Additionally, this research provides a brief
overview of the sensitivity analysis and performance
measurements of the convolution neural network model for
improved skin cancer detection accuracy. According to the
experimental and assessment portion, the approach may be
used as a baseline for helping medical practitioners find skin
cancer. Any professional can obtain accurate findings by
collecting a few random photos, but the old technique takes
too long to identify patients accurately.
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