CONVOLUTIONAL NEURAL NETWORK BASED FEATURE EXTRACTION FOR IRIS RECOGNITION

International Journal of Computer Science & Information Technology (IJCSIT) Vol 10, No 2, April 2018
DOI:10.5121/ijcsit.2018.10206 65
CONVOLUTIONAL NEURAL NETWORK BASED
FEATURE EXTRACTION FOR IRIS
RECOGNITION
Maram.G Alaslani1
and Lamiaa A. Elrefaei1,2
1
Computer Science Department, Faculty of Computing and Information Technology,
King Abdulaziz University, Jeddah, Saudi Arabia
2
Electrical Engineering Department, Faculty of Engineering at Shoubra, Benha
University, Cairo, Egypt
ABSTRACT
Iris is a powerful tool for reliable human identification. It has the potential to identify individuals with a
high degree of assurance. Extracting good features is the most significant step in the iris recognition
system. In the past, different features have been used to implement iris recognition system. Most of them are
depend on hand-crafted features designed by biometrics specialists. Due to the success of deep learning in
computer vision problems, the features learned by the Convolutional Neural Network (CNN) have gained
much attention to be applied for iris recognition system. In this paper, we evaluate the extracted learned
features from a pre-trained Convolutional Neural Network (Alex-Net Model) followed by a multi-class
Support Vector Machine (SVM) algorithm to perform classification. The performance of the proposed
system is investigated when extracting features from the segmented iris image and from the normalized iris
image. The proposed iris recognition system is tested on four public datasets IITD, iris databases CASIA-
Iris-V1, CASIA-Iris-thousand and, CASIA-Iris- V3 Interval. The system achieved excellent results with the
very high accuracy rate.
KEYWORDS
Biometrics, Iris, Recognition, Deep learning, Convolutional Neural Network (CNN), Feature extraction
(FE).
1. INTRODUCTION
In recent years, the concept of personal identity becomes critical, and the biometrics is a popular
way for authentication, which has been considered as the most secure and hardest way for
authentication purpose[1]. Biometric systems are developing technologies that can be used in
automatic systems for identifying individuals uniquely and effectively and it becomes a good
alternative to the traditional methods such as passwords. According to a study published in [1],
users choose to use smartphone biometrics as an alternate for passwords because it provides
additional safety for new technologies like Apple Pay [1].
Biometrics is an automated technique for authenticating an individual depends on a physical or
behavioral characteristic. Physical characteristics like fingerprints, voice, face, and iris. Behavior
characteristics are traits which can be learned or acquired such as, speaker verification, keystroke
dynamics and dynamic signature verification [2].

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Among all unique physical features, iris biometrics is known as the most accurate and impossible
to reproduce or replicate [3]. The iris is a visible but protected structure. Also, iris does not
significantly change over time, so it is perfect and reliable for identity authentication [3, 4].
Iris recognition system has main stages. First, segmenting the required region of iris, after that it
is normalized to be a fixed pattern in polar coordinates. Then, the features extracted from that
pattern to be recognized at the last stage [5].
Extracting effective features is the major important stage in a lot of object recognition and
computer vision tasks. Therefore, several researchers have focused on designing robust features
for a variety of image classification tasks [6].
Nowadays, much attention is given to feature learning algorithms and Convolutional Neural
Networks (CCN). In this algorithm, the image is fed directly to the convolutional neural
networks, then the algorithm extracts the best features of this image [6, 7].
In this paper, we propose an iris recognition system where the features are extracted from the pre-
trained CNN Alex-Net model, and for the classification task, the multi-class Support Vector
Machine (SVM) is used. The performance of the proposed system is investigated when 1)
extracting features directly from the segmented iris image, and 2) extracting features from the
normalized iris pattern. The experimental study is tested on four public datasets collected under
different conditions IITD iris databases[8], CASIA-Iris-V1[9], CASIA-Iris-thousand [10], and
CASIA-Iris- V3 Interval [11].
The rest of this paper is organized as follows: Section 2, provides a brief background about the
basic idea of Convolutional Neural Networks. In section 3, some related works are presented.
Section 4, introduces a description of the proposed iris recognition system. The experimental
results and analysis are presented in section 5. Finally, the Conclusion is given in section 6.
2. CONVOLUTIONAL NEURAL NETWORK BACKGROUND
Convolutional Neural Networks (CNN) belong to a specific category of Neural networks
methods. CNN has not only been able to learn image feature representations automatically, but
they have also outperformed many conventional hand-crafted feature techniques [12].
Neural networks models have a hierarchical representation of data and depend on the computation
of layers that have a sequential implementation, the previous layers output will be the next layers
input. Every layer gives one representation level. And, there are a set of weights that
parameterized the layers. Also, the input units linking to output units through the weights in
addition to a group of biases [13].The weights in the Convolutional Neural Networks (CNN), are
shared locally, which means that each location of the input has the similar weights. The filter
form by the weights linked to the similar output [13].
A Convolutional Neural Network (CNN) comprises of alternating layers of locally connected
convolutional layers where every layer has the same number of filters. downsampling layers, and
the fully connected layers that work as a classifier [14]. Figure 1, shows the overall architecture
of a CNN.
Convolutional Neural Networks architecture has three concepts that make it effective: local
receptive fields, weights sharing, and downsampling operations [15]. The local receptive field
means every neuron accepts input from a small portion of the preceding layer. Also, it has the
same size of the convolution filter. Local receptive fields are used in convolutional and

67
downsampling layers. The weights sharing is applied to the convolutional layer to control the
capacity and to decrease the complexity of the model. Finally, the nonlinear downsampling which
used in the downsampling layers to decrease the spatial size of the image as well as decrease the
number of the free parameters of the model. These concepts help the CNN to be strong and
effective in recognition tasks [15]. In more detail, the Convolutional Neural Networks layers are:
The Convolutional Layer: the weights in this layer are made of a set of learnable filters produced
randomly and learned through the back-propagation algorithm. The feature map is the outcome of
every filter that convolved through the entire image. Also, the feature maps have the same
number of the applied filters in that layer [15].
As shown in Figure 1, the first convolutional layer containing 6 filters that produced 6 feature
maps which arranged together. Every feature map represents specific features from the image, for
example, represented points, or represented vertical edges [16]. The convolution operation is
described in (1).
Here j is the specific convolution feature map, Mj is a selection of input maps, kij is the filter, bj is
the feature map bias, l is the layer in the CNN, and f is the activation function [14]. The ReLU is
the common activation function which used to add non-linearity to the network [15].
The Pooling Layer: which implements a downsampling operation to decrease the spatial size of
the convolutional layers. First, the size of pooling mask and pooling operation type must be
determined and after that applied at the pooling layer [17].
The pooling operation implemented on the pixel values captured by the pooling mask, multiply it
by a trainable coefficient, after that added to a trainable bias [14]. The pooling operation is
described in (2).
Where is the result of the downsampling operation applied on the jth
region in the input, is
the jth
region of interest captured by the pooling mask in the previous layer, pool is the specific
operation done on the region (max or average), is a trainable coefficient, is a trainable bias,
and f is an activation function [18]. The max pooling is the most common pooling operation
which is used in this paper.
Fully connected layers: which used the extracted features in the preceding layers to do the
classification task [19]. The result of the last convolutional or pooling layer is fed to the fully
connected layers like in an original neural network [15].
Figure 1. An illustration of the Convolutional Neural Networks architecture. The gray squares mention the
feature maps and the green squares mention the convolution filter. The cross-lines among the last two
layers mention the fully connected neurons[15].

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3. RELATED WORK
Several works have been addressed the use of the Convolutional Neural Network (CNN) for
biometric recognition. Some of these works are presented here.
The authors in [5] proposed an iris recognition system where they used the pertained VGG-Net to
extract the deep features. Then they used a multi-class SVM algorithm for classification. They
tested their system on two iris databases, IIT iris dataset, and CASIA 1000 Iris dataset. Their
experiment achieved high results with the accuracy recognition of 99.4%.
The authors in [20] proposed a system for face recognition with strong 4-layer CNN architecture;
the proposed system can handle facial images which have facial expressions, poses, occlusions
and changing illumination. The results of the experiment showed a high accuracy rate of 99.5%
on AR database. Their experiment on the 35-individuals from FERET database shown
recognition accuracy of 85.13%.
The authors in [14] proposed a system for the diagnosis of iris nevus depending on a
Convolutional Neural Network in addition to deep belief network. Iris nevus is defined as a
pigmented growth located around the pupil or in the front of the eye. They used a pertained
LeNet-5 architecture for CNN. Their accuracy rates are 93.35% for CNN and 93.67% for the
deep belief network.
The authors in [7] proposed an algorithm which uses a convolutional network named scattering
transform/network which delivers a multi-layer representation of the signal and is invariant to
translation, small deformation, and rotation. After extraction of scattering features, they used the
Principal component analysis to decrease the data dimensionality and then recognition is
performed using a multi-class support vector machine. Their proposed algorithm has been tested
on three face datasets and gives a very high recognition rate.
The authors in [21] proposed a MATLAB-based finger-vein recognition system based on CNN
with Graphical User Interface as the user input. To retrain the network for new incoming subjects,
they used two layers of CNN out of the proposed four-layer CNN. The pre-processing stages for
finger-vein images and CNN design have been conducted on different platforms. They tested the
system on 50 images that are developed in-house. The experiment achieved an accuracy rate of
96%.
Table 1. summarize the related work presented in this section.
4. THE PROPOSED IRIS RECOGNITION SYSTEM
The proposed iris recognition system using the Convolutional Neural Network (Alex Net) for
feature extraction is shown in Figure 2, The development of the proposed iris recognition system
is discussed in three parts: the pre-processing stage, feature extraction stage, and classification
stage.
4.1. The preprocessing stage
In this stage, iris segmentation and normalization are performed. In the proposed system, the
primary goal of selecting the iris region as an input to Convolutional Neural Network (Alex-net)
model as an alternative to the entire eye image, as proposed in [15], is to decrease the
computational complexity of the model. An additional goal is to avoid the decline of matching
performance as well as the extraction of feature causing by eyelids and eyelashes appearance.

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For the iris segmentation process, the circular Hough transform is applied for detecting the
boundaries of the iris and the pupil which involve first perform Canny Edge detection to generate
an edge map [22]. The Canny Edge detecting contains five stages: Smoothing, Finding,
Gradients, Non-maximum suppression, Double thresholding, Edge tracking through hysteresis
[23]. Algorithm 1 lists all the required steps for iris segmentation.
For iris normalization process, the rubber sheet model is used. As shown in Figure 3, In this
model every pixel within the localized iris area is remapped from Cartesian coordinate (x,y) to
polar coordinate (r,θ) where r is on the interval [0,1], and θ is angle [0,2π]. The representation of
mapping the iris region to the normalized polar coordinates can be modeled as in (3) [15, 24].
Where I(x,y) is the iris area, (x,y) is the original Cartesian coordinates, (r,θ) is the corresponding
normalized polar coordinates xp, yp and xl, yl are the coordinates of the pupil and iris boundaries
along the θ direction [15, 24].
The results of the segmentation and the normalization steps are shown in Figure 4.
Table 1. Summary of Using Convolutional Neural Network for Biometric Recognition
Reference#
(Year)
Biometric
CNN
Model
Classification Dataset Accuracy
[5]
(2016)
iris VGG-Net
multi-class
SVM
IIT iris dataset, and
CASIA 1000 Iris dataset
99.4% on IIT
iris dataset
90% on CASIA
1000 Iris dataset
[20]
(2014)
face LeNet-5
classification
depends on the
winner-takes-
all rule
AR database and FERET
database
99.5% on AR
database
85.13% on
FERET
database
[14]
(2017)
iris LeNet-5
multi-class
SVM
A free database (The
Eye Cancer Foundation,
Eye Cancer Network)
93.35%
[7]
(2016)
face
scattering
transform/
network
multi-class
SVM
Yale Face Database
Georgia Tech Face
Database
Extended Yale Face
Database
93.1%
[21]
(2016)
Finger-
vein
LeNet-5
classification
depends on the
winner-takes-
all rule
The database collected
in-house using 6
different fingers. There
are 60 participants from
the Universiti Teknikal
Malaysia Melaka. The
total is 600 samples.
96%

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Figure 2. The proposed iris recognition system using Convolutional Neural Network (Alex Net) for feature
extraction
Figure 3. Normalized iris region using the rubber sheet model [15].
(a) (b) (c) (d)
Figure 4. The result of segmentation and normalization stage for (Image 01-L) from IIT Iris Database (a)
Original input image. (b) Detected iris and pupil boundary. (c) segmented iris image. (d) Normalized iris
image.
Algorithm 1: Automatic iris region segmentation from an eye image.
//Input: The input eye image
//Output: center and radius of iris circle, and center and radius of pupil circle
1: Define the range of pupil and iris radius, manually set the range of radius, according to the
database used
2: Find the iris boundaries
• Perform canny edge detection to generate an edge map.
a) Apply Gaussian filter
b) Apply gamma function
c) Apply non-maximum suppression
d) Apply hysteresis thresholding
• Apply circular Hough transform
• Draw circles of different radius for all edge point.
• Find the maximum in the Hough space, and it will be the parameters of the circle
3: Find pupil boundary using the same steps but just using the region within the previously detected
iris boundary
4: Return the center and radius of iris and pupil circle
4.2. The feature extraction stage
The pre-trained Convolutional Neural Network model (Alex-Net) is used for feature extraction
process. This model was designed by the Super Vision group[25]. Alex-Net is a scaled version of
the conventional Le-Net [12].

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Alex-Net is trained on the Image-Net Large-Scale Visual Recognition Challenge (ILSVRC).
Alex-Net is trained to classify the 1.2 million images in the image-Net database into 1000
different classes. Figure 5 shows the overall architecture of Alex-Net model [25]. It contains set
of layers; the input layer is the first layer which defines the input dimensions. The Alex-Net
model needs the input image to be 227-by-227-by-3. The middle layers make up the bulk of the
AlexNet. These layers consist of series of five convolutional layers, followed by rectified linear
units (ReLU) and max-pooling layers. Next to these layers, three fully-connected layers. The
classification layer is the final layer [25].
The first convolutional layers perform 11x11 convolutions with stride 4 and with no padding, the
second convolutional layers perform 5x5 convolutions with stride 1 and pad 2, The other
convolutional layers perform 3x3 convolutions with stride 1 and pad 1, and 2x2 pooling (with no
padding). The detailed explanation of Alex-Net layers is shown in Table 2.
Figure 5. The architecture of Alex-Net model [25]
Table 2. The Detailed Explanation of The Alex-Net Layer
Type of Layer No. of
Filter
Feature Map Size Kernel
Size
No. of
Stride
No. of Padding
Image input layer 227 x 227 x3
(height x width x
channel)
(1st convolutional layer)
Relu-1
Cross-channel normalization
Max pooling1
96
1
55 x 55 x 96
27x27x96
11x11
3x3
4x4
2x2
0x0
0x0
(2nd convolutional layer)
Relu-2
Cross-channel normalization
Max pooling2
256
1
27 x 27 x 256
13x13x256
5x5
3x3
1x1
2x2
2x2
0x0
(3rd convolutional layer)
Relu-3
384 13 x 13 x 384 3x3 1x1 1x1
(4th convolutional layer)
Relu-4
384 13 x 13 x 384 3x3 1x1 1x1
(5th convolutional layer)
Relu-5
Max pooling5
256
1
13 x 13 x 256
6x6x256
3x3
3x3
1x1
2x2
1x1
0x0
Fully connected layer-6(fc6)
Relu-6
4096 x1
4096 x1
Fully connected layer-7 (fc7)
Relu-7
4096 x1
4096 x1
Fully connected layer-8 (fc8)
Softmax layer
Output layer
1000x1
1000 class

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4.3. The classification stage
The classifier is needed after feature extraction to find the corresponding label for every test
image. Different types of classifiers can be used for this task, for example, Support Vector
Machine, Softmax Regression, and Neural Network [26]. In this work, a multiclass Support
Vector Machine classifier has been used. A brief description of multiclass SVM is as follows:
Assuming we have the set of training data (x1,y1),(x2,y2),…(xn,yn) and we want to classify the set
into two classes where xi ∈ Rd
is the feature vector and yi ∈ {-1, +1} is the label class. The two
classes are linearly separable with a hyperplane w.x+b=0. With no other previous knowledge
about the data, SVM can find the optimal hyperplane as the one with the maximum margin
(which results in the minimum expected generalization error) [27].
The multi-class SVM can be implemented for a set of data with M classes, we can train M binary
classifiers that can distinguish each class against all other classes, then select the class that
classifies the test sample with the greatest margin (one-vs-all) [27].
Algorithm 2 lists all the required steps for the feature extraction and the classification stages.
Algorithm 2: Extracting feature using a Pre-trained CNN (Alex-Net) and classify the feature using the
SVM algorithm.
//Input: The input images
//Output: The recognition accuracy
1: Load input images and its labels
2: Split each category into the similar number of images
3: Load pre-trained CNN (Alex Net model)
4: Pre-process images For Alex Net model
5: Split the sets of the images into training and testing data.
6: Extract Features from the deeper layers of Alex-Net model.
7: Get training labels from the training set
8: Use the training features to train a multiclass SVM classifier
9: Extract features from test set
10: Use the trained classifier to predict the label for test set
11: Get the known labels for test set
12: Tabulate the results by a confusion matrix.
13: Convert confusion matrix into percentage form
14: Display the mean accuracy
5. EXPERIMENTAL RESULTS AND ANALYSIS
The proposed system is tested using four popular iris datasets: IITD iris databases [8], CASIA-
Iris-V1 [9], CASIA-Iris-thousand [10], and CASIA-Iris-Interval [11]. The iris images are
captured in these databases under different situations of pupil dilation, eyelids/eyelashes
occlusion, slight shadow of eyelids, specular reflection, etc.
The proposed system performance is evaluated according to the accuracy of the recognition rate.
The accuracy is the fraction of labels that the classifier predicts correctly. We tested the system on
60 subjects in each dataset. The specifications of these subjects for the four datasets are
summarized in Table 3.

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Table 3. The specifications of the used datasets
dataset IITD CASIA-Iris-V1
CASIA-Iris-
Thousand
CASIA-Iris-
Interval
Number of
subjects
60 60 60 60
Samples per
subject
10 7 10 10
Number of images 600 420 600 600
Image size (pixels) (320 × 240) (320 × 280) (640 × 480) (320 × 280)
Image format BMP BMP JPEG JPEG
The experiments have been conducted on these datasets in two cases, the first case: using the iris
image after segmentation. In this case we resize the image to be 227-by-227 as required for the
for Alex-Net input.
The second case: using the iris image after normalization. In the normalization stage, the
normalization parameters were set manually, the radial resolution is set to 227 and the angular
resolution also is 227. So, the size of the image that comes from normalization stage is 227-by-
227, which is suitable for Alex-Net input.
The sets of the segmented and normalized images are split randomly into training and test data.
For each person 80% of images are used for the training and 20% of images are used for the
testing.
The features extracted from one of the deeper layers of Alex-Net named 'fc6' using the
"activations" method. The output of (fc6) layer is a 4096-dimensional vector. The 'MiniBatchSize'
is set to 22. The mini-batch is defined as a subset of the training data which used to assess the
gradient of the loss function in addition to updating the weights[25]. To speed-up the multiclass
SVM, the activations output is arranged as columns.
The system and its stages are implemented using MATLAB 2017 on a laptop with Core i7 CPU
running at 2.8GHz.
The learned filters on the first layer of the used convolutional neural network (Alex-Net) are
shown in Figure 6, It contains mostly edges and colors, which indicates that the filters at layer
'conv1' are edge detectors and color filters. The edge detectors are at different angles, which
allows the network to construct more complex features in the later layers. Moreover, the filters
learned on (fc6) layer is shown in Figure 7, This layer is towards the end of the network and
learns high-level combinations of the features learned by the earlier layers.
Figure 6. Filters learned on the first layer of CNN (Alex-Net) on IIT Iris Database

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Figure 7. Filters learned on (fc6) layer of CNN (Alex-Net) on IIT Iris Database
As stated earlier, different layers encode different levels of visual content. To investigate the
performance due to each layer in the used CNN (Alex-Net), the recognition accuracy is estimated
after using the output from each layer as a feature vector to represent the iris. The recognition
accuracy is illustrated in Figure 8 and Figure 9 when the features are extracted from the iris
segmented image and from the iris normalized image respectively.
Figure 8. The recognition accuracy after segmentation stage versus different Alex-Net layer
As it can be seen from Figure 8. and Figure 9., in both cases of using the iris segmented image
and the iris normalized image, the features from the (fc6) layer have the highest recognition
accuracy and after that, the recognition accuracy drops. That because the higher layers of the
Alex-Net model, maybe cannot distinguish much between diverse iris patterns because they
capture only the abstract and high-level information, while the mid-level features in the fc6 layer
have additional distinguished power for same-class recognition.
The proposed system recognition accuracy and the required time to extract the features for each
iris image for the four databases are shown in Table 4. The recognition accuracy after the
segmentation stage is better than the recognition accuracy after the normalization stage that
because Alex-Net architecture can capture the discriminative visual features in the segmented iris
image better than the normalize iris images. but the time for extracting features after the
normalization stage is less than the time for extracting features after the segmentation stage.

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Figure 9. The recognition accuracy after normalization stage versus different Alex-Net layer
Table 4. The recognition accuracy of the adopted iris image databases.
Database
After Segmentation After Normalization
Recognition
Accuracy
Time (S)
Recognition
Accuracy
Time (S)
IIT Delhi Iris Database 100% 0.06 98.33% 0.015
CASIA-Iris-V1 98% 0.08 85% 0.02
CASIA-Iris-Thousand 98% 0.06 96.6% 0.02
CASIA-Iris-Interval 89% 0.09 86.6% 0.02
The proposed system recognition accuracy for iris image after segmentation and the required time
to extract features for each iris image are compared to other systems as illustrated in Table 5, the
proposed iris recognition system has overall, outperformed than other feature extraction
algorithms which include, Intersecting Cortical Model (ICM) network [28], circular sector and
triangular DCT [29], discrete wavelet transformation (DWT) [30], Radon transform and
gradient-based isolation [31], Discrete Wavelet Trans Intersecting Cortical Model (ICM) network
form (DWT), Discrete Cosine Transform (DCT) [32], scattering transform and textural features
[6] and the feature extraction using pre-trained VGG-Net [5]. Also, the proposed system feature
extraction for each image takes less time than previous algorithms.
6. CONCLUSIONS
This paper evaluated the extracted learned features from a pre-trained Convolutional Neural
Network (Alex-Net) followed by multi-class SVM algorithm to perform iris recognition. The iris
is segmented using circular Hough transform and normalized using rubber sheet model. The
segmented and normalized image is fed as an input to the CNN (Alex-Net). The proposed system
is tested on public datasets (IITD iris databases, CASIA-Iris-V1, CASIA-Iris-thousand, and
CASIA-Iris- Interval), and a high accuracy rate is achieved. The results showed that the
recognition accuracy when extracting features from the segmented image is higher than when
extracting features from the normalized image.

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In the future, we will evaluate the performance of the proposed algorithm using the different pre-
trained model in more iris datasets with other biometric recognition problems.
Table 5. Comparison Between the Performance of The Proposed Iris Recognition Scheme and The Other
Algorithms
Reference#
(Year)
Feature Extraction Database
Recognition
Accuracy
Time (S)
[28]
(2008)
Intersecting Cortical
Model (ICM) network
CASIA-Iris-V1 97.74% Not available
[29]
(2012)
circular sector and
triangular DCT
IIT Delhi Iris Database 97.12% Not available
[30]
(2013)
discrete wavelet
transformation (DWT)
IIT Delhi Iris Database 99.5 Not available
[31]
(2014)
Radon transform and
gradient-based isolation
IIT Delhi Iris Database 95.93% 0.10
CASIA-Iris-Interval 84.17% 0.44
[32]
(2015)
Discrete Wavelet
Transform (DWT) and
Discrete Cosine
Transform (DCT)
IIT Delhi Iris Database 97.81% 93.24
[6]
(2015)
Texture+ Scattering
Features
IIT Delhi Iris Database 99.2% Not available
[5]
(2016)
pre-trained VGG-Net
IIT Delhi Iris Database 99%
Not available
CASIA-Iris-Thousand 90%
The Proposed
scheme
(2018)
pre-trained Alex-Net
IIT Delhi Iris
Database
100% 0.06
CASIA-Iris-V1 98.3% 0.08
CASIA-Iris-
Thousand
98% 0.06
CASIA-Iris-Interval 89% 0.09
ACKNOWLEDGEMENTS
This work was supported by King Abdulaziz City for Science and Technology (KACST) under
Grant Number (PGP – 37 – 1858). Therefore, the authors wish to thank, KACST technical and
financial support.
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AUTHORS
Maram G. Alaslani Received her B.Sc. degree in Computer Science with Honors from King Abdulaziz
University in 2010. She works as Teaching Assistant from 2011 to date at Faculty of Computers and
Information Technology at King Abdulaziz University, Rabigh, Saudi Arabia. Now she is working in her
Master Degree at King Abdulaziz University, Jeddah, Saudi Arabia. She has a research interest in image
processing, pattern recognition, and neural network..
Lamiaa A. Elrefaei received her B.Sc. degree with honors in Electrical Engineering (Electronics and
Telecommunications) in 1997, her M.Sc. in 2003 and Ph.D. in 2008 in Electrical Engineering (Electronics)
from faculty of Engineering at Shoubra, Benha University, Egypt. She held a number of faculty positions at
Benha University, as Teaching Assistant from 1998 to 2003, as an Assistant Lecturer from 2003 to 2008,
and has been a lecturer from 2008 to date. She is currently an Associate Professor at the faculty of
Computing and Information Technology, King Abdulaziz University, Jeddah, Saudi Arabia. Her research
interests include computational intelligence, biometrics, multimedia security, wireless networks, and Nano
networks. She is a senior member of IEEE..

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