1. Introduction

Since the dawn of the Strategic Defense Initiative (SDI), different types of threats and the complex defense system architectures have always been a confrontation to the target detection and tracking. In this context, detection is always prior to tracking without which the aerospace guidance and control is practically impossible [1]. In fact, this is true for civilian sensors such as Primary and Secondary Surveillance Radars to control incoming and departing airplanes, as well as, for military sensors to perform a sequence of successful tasks [2]. The degree of target detection and tracking varies from single sensor to multiple sensors which led to multi sensor fusion for multi object tracking. Intelligence, Surveillance and Reconnaissance (ISR), missile guidance and control, remote sensing and oceanography, computer vision and robotic applications are the few wide variety of applications utilizing from single sensor to multiple sensor detection and tracking [3]. Based on the type of threat and nature of attack many integrated solutions have been introduced to confront with the threat. One such an example is U.S. National Missile Defense system. Aurgus and Cerebrus are the FLIR designed integrated systems for border surveillance with 24/7 situational awareness [4]. Apart from RADAR, Optical and Thermal technology, Bat acoustic detection system, a new technology was introduced for target localization and identification. Echolocation bionics [5], [6] based on the bat technology utilizing the acoustic echo is a process of determining the relative range and velocity, bearing angle and size of the target. In fact, echolocation bionics has the superior advantages and success rate compared to other detection and tracking technologies that made it helpful in civil and military applications. However, irrespective of any given dynamic situation and the type of technology, the designated track has to be followed by a closed loop system tracker for airborne interception or ground attack that requires high performance data association algorithms. The purpose of data association and processing algorithms is to mitigate the high degree of uncertainty associated with the target motion and the environmental conditions resulting from system noise and measurement noise [7] [8].  With these insights, this paper presents the theoretical advancements in echolocation bionics and, tracking and filtering of bat acoustic signal that could enhance the performance of echolocation bionic sensors. On the other hand, this paper also focuses on application of image processing techniques using Finite Impulse Response filters as an added extension to the echolocation bionics. Two-dimensional FIR filters are the most profoundly used filters for image data processing from a given particular optical device. Image data processing techniques such as image sharpening and smoothing, detecting edges in a particular image clustered with many features, and contrast improvement are necessary to apply for agiven 2D image data in the presence of noisy environments. All these techniques are applied to visualize the data as being the key objective in modern computational sciences. Data visualization is not an easy operation as how it has been in a perfect daylight conditions. In poor visibility, capturing and processing of image data and its visualization is quite daunting and a difficult task. However, there are optical and thermal sensors that can enhance processing of an image even in poor visibility conditions.  In this paper, the image of a drone is captured by a digital night vision camera with built-in IR mode and a thermal camera to examine the effects with a 2D FIR filter. This paper presents the superiority and the performance of individual sensor in detection and enhancement, and recognize the patterns in the captured images. Section 2 presents the echolocation bionics and state estimation. Section 3discusses the sensor specifications and test images of target. Section 4demonstrates the image processing based target recognition and identification methods.

2. Echolocation and Tracking

Usually, the mouth (nose) of bat is for broadcasting echolocation and its ears were used as receiving antennas. The emission system of bat is an adaptive waveform where each pulse consists of eight signals. Four long-constant frequency (CF) and four short constant frequency modulated (FM) harmonics [9].  The speed information is obtained by CF component and the FM component determines the detection and imaging. Whenever a bat gets closer to its stationary prey, due to Doppler Effect the echo frequency becomes higher than the emitted pulse [10]. At the same time, the pulse density becomes larger and larger which is shown in Figure 1 describing the attack process of a bat and the adaptive waveform conversion on the top left.

Figure 1.Bat intercepting its prey [10]

A three dimensional simulation of a bat sonar beam while attacking its prey, and the two dimensional spectrogram sequence of the bat echolocation relative to the target [11] is shown in Figure 2. Initially the bat searches for its prey using its directional beam and once the prey is detected the target is locked with the sonar beam. The bat while hunting to its prey decreases the number of echoes it emits using automatic gain control.

For the purpose of simulation and based on the literature available as represented in the Figures 1 and 2, the three dimensional motion of the bat is considered as a spiral motion and the prey or the target is stationary. The position and the velocity of the target are almost negligible when compared to the motion of the bat. It is assumed that the bat has already received the passive observation of the target and the simulation shows the hunting of the bat toward its prey. The relative position which is also known as line of sight (LOS) between the bat and the prey is considered for tracking using different state estimators and the performance evaluation of each estimator in terms of RMS error measure. Using the flat earth approximation [12], the target and its prey are described in a Spherical Coordinate system [13] upon which the position is illustrated in Cartesian coordinate system for 3D target tracking. Therefore, the finite dimensional representation [14] for the target and the prey model, as well as, the LOS system measurements [15] are modeled by

Figure 2. Approach methods of bat [11]

Equation 1 describes the 3D motion characteristics of bat and its prey in terms of position, velocity and acceleration. Equation 2 presents the relative position or the line of sight distance between the bat and its target. Figure 3 shows the motion characteristics [16] that are utilized in state variable form and all the motions are simulated in MATLAB.

Figure 3. Bat its prey motion dynamics

Figure 4.Relative LOS distance

Figure 5. Fixed gain filter recursive flow diagram [19]

2.1.  State Estimation of Line of Sight

The difference in position between the bat and its prey is considered as the line of sight (LOS) distance for which a popular finite-dimension approach known as state estimation is utilized in this paper for predicting and correcting the LOS distance. Therefore, the generic representation of a kinetic model [17] is given by

Two different filters namely fixed-gain andKalman filters are studied and implemented for LOS estimation. Before examining each filter, the underlying assumption made is portraying the measurement acoustic noise as zero-mean Gaussian (ZMG) as shown in the Figure 4 with a known standard deviation.

2.2.  Linear Rustic Filters

Assuming that the system is a linear time invariant [18], the first class of rustic filters namely fixed gain and Kalman filters are implemented for which the process flow diagram for each filter is shown in Figures 5 and 6. A one dimensional third order filter is adopted for the LOS estimation.

Figure 6. Kalman filter recursive flow diagram [19]

Table 1 Simulation Parameters

2.3.  Simulation Analysis

For the purpose of simulation, it is assumed that both bat and prey are in the vicinity with a radius of maximum of 25 meters. The simulation parameters are shown in Table1.

The initial values of prediction covariance and transition matrix are employed as follows:

To ensure the performance of each estimator the error analysis in LOS distance is computed using RMS error given by the Equation 6.

Figure 7. Actual, Measured and LOS distances

Figure 8. RMS Errors

Figure 7 shows the tracking performances for LOS distance. The principal function of these trackers is for better signal reconstruction by reducing measurement noise with less residual. The performance of each filter estimates is shown from Figure 8. It is found that the efficiency of fixed gain filter is highly reliable upon the filter gain coefficients which are solely depend upon the smoothing coefficient that varies from zero to one. A value of 1 is chosen for heavy smoothing and low value for less smoothing. Whereas the Kalman filter has a better estimate than fixed gain filter because the Kalman gains are computed dynamically. In other words the Kalman gain matrix is determined from the state error variance as well as from measurement and noise variances adjusts adaptively. The Kalman filter computes its own state error uncertainty estimates while observing a new measurement. Also as it is mentioned [20] if the new measurement noise error variance is bigger than the state error variance, the Kalman filter will place less emphasis on the new measurement than if the state error is larger than the measurement error. On the other hand the simple fixed gain filter computes the filter gains based on assigned smoothing coefficient. This effect and the superiority of Kalman filter over fixed gain estimator can be seen in RMS errors shown in Figure 8. The performance of the fixed gain and Kalman filters serves as best linear estimators for reducing mean squared errors in LOS distance. The next section deals with the target recognition and identification using image processing techniques. From the Figure 8 and using the equation 6 the RMS errors for measured, fixed gain and Kalman filter is found to be 1.5350 m, 0.3119 m and 0.0206 m, respectively, and are shown in Table 2.

Table 2: Thermal Camera Specs

Table 3: IR Digital Night Vision Camera Specs

3. Sensor Specifications

3.1.  Night Vision Camera

A night vision digital video camera is employed for capturing the images to post process the images in the MATLAB. The night vision camera selected for this experiment belongs to a class of image intensifier (I²) device. Also, a CMVision IR infrared illuminator is added to the night vision camera for more illumination of the target drone. The important technical specifications [21] of the two devices are given in Table 3.

3.2.  Thermal Camera

A Seek CompactXR thermal imaging camera designed for smart phone is utilized in this research work. The purpose of using a thermal camera is based on their ability to detect and track in extreme pitch black conditions.They are more sensitive to temperature variations. Designed with over 32,000 thermal pixels, the CompactXR will sense the temperature illumination and displays on the smart phone installed with the Seek thermal app. The important technical features [22] of the thermal sensor are given in Table 4.

Table 4: Thermal Camera Specs

3.3.  Target Drone and Platform Setup

A 4 channel X5C 2.4GHz remote control quadcopter is used as a target drone. The size of the drone is 16.5 x 12.2 x 3.8 inches. Although, this drone is designed with built-in 6 axis gyroscope with 360⁰ 3D eversion and throwing flight function, the target drone was made to hang on a wallas well as tree for the sake of simplicity in simulation. A tripod mounted with different sensors shown in Figure 9 is used to capture the images of the drone at different light conditions.

Figure 9. Sensors Tripod

To better understand the image processing techniques, two different environmental backgrounds are considered and the performance of each device is observed. The first set of images is taken with a dark background and the second set of images is taken as the target drone blended to the outside environment.

1. First set of Images

Figure 10. Test image with dark background

Figure 11. Test image in night vision

Figure 12. Thermal image

1. Second Set of Images

Figure 13. Test image when target blended to the background

Figure 14. Figure: Test image in night vision

Figure 15. Thermal image

The heat dissipated by the motors of the drone can be easily seen in Figures 12 and 13. The next section deals with the numerical simulation analysis by utilizing the edge detection, image sharpening, smoothing, and contrast enhancement techniques [20].

4. Numerical Simulation Analysis

Each pixel element representing the brightness on the corresponding location in an image is an 8-bit number and can be combined with the adjacent pixels through simple weighted average. Also, the texture of the image as well as sharpness, resolution and contrast can be altered. Moreover, the importance of feature extraction using a signal processing filter known as template detector can also be applied to an image to extract the features like edges of a drone when blended into the surrounding clutter. For the regions where there is a perfect match between the template and pixel, the template detector produces high output for those regions. In the neighborhood of diversity of drones, the computer will be able to recognize one drone from the other using vision feature in which the 2D digital filter or the convolver has become the main processing tool. The core function of a 2D filter is to combine the local pixels with the weights to output the filtered image brightness. It can be expressed as

where,  is the processed image brightness and  are the weights. Based on the solid foundation of 2D FIR filters, the moving average technique has originated as a fundamental process for brightness computation that utilizes weighted average of the neighborhood pixels. The visual effects such as alteration of image focus, image contrast and sharpness can also be implemented with 2D filters. They can enhance and reduce the texture features in an image. One of the simple illustrations of a 2D FIR filtering process is pixilation or pixel decimation where all the pixels are replaced by the average of the pixels of original higher resolution image. This technique is often applied in television broadcast to obscure some offensive images and blur the selected areas.

4.1.  Edge Detection

One of the wider applications of a 2D FIR filter is edge detection to enhance boundaries or the shape of an object in an image.As 2D FIR filtering being a prominent application in computer pattern recognition, determining the edges of a target in a particular image can extract important features such as its size and shape.  The target considered here is a drone in the image captured by digital night vision and thermal camera. A gradient filter which is an example of an edge detector is applied in the direction of positive x-gradient. Since it is undesirable to produce an output image offset by half a pixel in the desired gradient direction, a symmetric finite-difference approximation is typically used to avoid the unwanted offsets. It is given by the equation

The effect of the negative sign in front of the equation 8 is shown in Figures 16, 18 and 19. These are the observations performed by an edge detector using a gradient with directional derivatives. The disadvantage of these directional derivatives is the presence of the inherent noise. As this method is solely based on a finite difference method, there will always be a random noise associated because ofthe difference computation between the two pixels. The finite difference method tends to amplify the noise and averaging the pixels tends to smooth out the image noise. However, apart from these deficiencies, the noise can be suppressed by adding more pixels in the filter. This can be accomplished by simply averaging the derivatives based on the choice of direction. If it is in x-direction, the derivatives in the adjacent rows will be averaged, else the adjacent columns in y-direction. The choice of filter weights when the gradient is in the negative x-direction are given by the equation

Equation is known as kernel operator that has an ease of rotation based on the desired gradient direction. In essence, the negative kernel operator in upward (positive) y-direction is given by equation

There are different 2D based gradient kernel operators available with respect to size and complexity, and finite-difference approximation based higher order filters. Any two-dimensional image data with gradient information is useful for automatic detection to identify and extract the geometric features. These directional derivative gradients applied either in the x (toward right) and y (upward) axis are essential for detecting the edges in a particular orientation of an image. However, the complete geometric features of an image in all directions, i.e., all edges of a particular object in an image are needed for the application of this paper. Indeed, by detecting all edges simultaneously, the important features such as shape and size, as well as orientation can be determined. A widely used conventional edge detection technique known as Sobel edge detection is utilized in this paper for identifying the target object which is the drone in the test images. A Sobel edge detector first calculates the spatial derivatives in each x-and-y directions. Thereby, it sums their squares and computes the square root. This complex process can be avoided by Kirsh operator which is very less complex in nature. Instead of computing the square root of the sum, the Kirsh operator estimates the neighborhood gradients and calculates the maximum absolute value to produce an edge detected output. Figures 16, 17 and 18 show the application of Sobel edge detection combined with Kirsh operator approximation depicting the significance of edge detection for feature extraction. Moreover, apart from the various features of these images that are useful for pattern recognition analysis, these edge detection techniques are also applicable to enhance the image visual quality.

4.2.  Image Enhancement

Typically, these edge detectors are considered as high-pass filters through which the random changes in spatial brightness could be seen. On the other aspect, the sharpness of an image to its highest acuity can be enhanced by amplifying the higher frequencies and attenuating the lower frequencies. A rotational invariant Laplacian operator is applied for the test images shown in Figure 10, 11, 13 and 14 to perform this operation and is given by

Figure 16. Enhancement and edge detection of optical image

Figure 17. Edge detection of night vision image

Figure 18. Edge detection of optical image

Figure 19. Edge detection of night vision image

The Laplacian operator employs finite difference method in summing up the x-direction and negative (second) derivatives in y-direction expressed as

In order to reduce noise by considering all eight neighboring pixels as is the case in the edge detector, the addition in the diagonal components are done to negative Laplacian given by

Based on the finite differences, equations 11, 12 and 13 are known as normalized operators for approximating a negative Laplacian operator. The normalization was done in such a way that the average brightness in the image is not shifted. The advantage with the Laplacian operator is that it will cancel the varying brightness however, it makes the image noisier as the random variations are amplified by the operator from pixel to pixel. Moreover, the edge enhancement and the image sharpening are done by adding the output image of the negative Laplacian operator to its original image. Although, it adds noise, the high frequency spatial components are enhanced by image sharpening filter, though the filtered image doesn’t look like the original image. Hence, in this case an unsharp filter can be utilized to improve the sharpness of an original image by adding or subtracting some percentage to the original image.

4.3.  Image Sharpening

The digital un-sharp filter is done either by adding or subtracting the Laplacian filtered image to the original or by subtracting the low-pass-filtered image from the original. The image which is added or subtracted to the original in place of the Laplacian image is considered as the high frequency image. Another less noisy approach is the Laplacian of Gaussian (LOG) filter in which first the image is low pass filtered to remove noises and Laplacian is applied. In essence, as the 2D convolution operation of the filter is associative, the LOG smoothing filter result can be used as the 2D FIR filter. The LOG function is given by

where, x and y can vary from -1 to +1 pixel. Assuming σ=0.66, the unshrpen operator is given by

Figure 20. Image enhancement of optical image

Figure 21. Image enhancement of night vision image

Figure 22. Image enhancement of optical image

Figure 23. Image enhancement of night vision image

Figure 24. Comparison of night vision and thermal vision in dense fog

Conclusion

This paper deals with the advancement of echolocation bionics and its importance for analyzing and preying upon the target. The mathematical modeling and simulation of bat and its prey is developed upon which the tracking of LOS distance using different state estimators is presented. The RMS error shows the superiority of state estimators for better reconstruction of the signal with less residual. Also, the second half of the paper presents the image processing based techniques to identify the target drone in different places at different environmental situations using multiple sensors. Figure 24 demonstrates the advantages of thermal sensor over digital IR night vision cameras in the midst of fog showing that the thermal sensors can detect the heat signatures, whereas, night vision cannot penetrate through fog.

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33. Binghan Li, Yindong Hua, Mi Lu, "Advanced Multiple Linear Regression Based Dark Channel Prior Applied on Dehazing Image and Generating Synthetic Haze", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 790–800, 2021. doi: 10.25046/aj060291
34. Susanto Kumar Ghosh, Mohammad Rafiqul Islam, "Convolutional Neural Network Based on HOG Feature for Bird Species Detection and Classification", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 733–745, 2021. doi: 10.25046/aj060285
35. Shahnaj Parvin, Liton Jude Rozario, Md. Ezharul Islam, "Vehicle Number Plate Detection and Recognition Techniques: A Review", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 423–438, 2021. doi: 10.25046/aj060249
36. Adelaiye Oluwasegun Ishaya, Ajibola Aminat, Bisallah Hashim, Abiona Akeem Adekunle, "Improved Detection of Advanced Persistent Threats Using an Anomaly Detection Ensemble Approach", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 295–302, 2021. doi: 10.25046/aj060234
37. Sk. Md. Masudul Ahsan, Aminul Islam, "Visual Saliency Detection using Seam and Color Cues", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 2, pp. 139–153, 2021. doi: 10.25046/aj060217
38. Nasr Rashid, Khaled Kaaniche, "SIFT Implementation based on LEON3 Processor", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 1257–1263, 2021. doi: 10.25046/aj0601143
39. Bryan Huaytalla, Diego Humari, Guillermo Kemper, "An algorithm for Peruvian counterfeit Banknote Detection based on Digital Image Processing and SVM", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 1171–1178, 2021. doi: 10.25046/aj0601132
40. Antonio Vitale, Federico Corraro, Nicola Genito, Luca Garbarino, Leopoldo Verde, "An Innovative Angle of Attack Virtual Sensor for Physical-Analytical Redundant Measurement System Applicable to Commercial Aircraft", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 698–709, 2021. doi: 10.25046/aj060176
41. Anass Barodi, Abderrahim Bajit, Taoufiq El Harrouti, Ahmed Tamtaoui, Mohammed Benbrahim, "An Enhanced Artificial Intelligence-Based Approach Applied to Vehicular Traffic Signs Detection and Road Safety Enhancement", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 672–683, 2021. doi: 10.25046/aj060173
42. Alan A. Jorgensen, Las Vegas, Connie R. Masters, Ratan K. Guha, Andrew C. Masters, "Bounded Floating Point: Identifying and Revealing Floating-Point Error", Advances in Science, Technology and Engineering Systems Journal, vol. 6, no. 1, pp. 519–531, 2021. doi: 10.25046/aj060157
43. Aarthi Ramachandran, Amudha Joseph, Shunmuga Velayutham, "Feature Gate Computational Top-Down Model for Target Detection", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 6, pp. 1001–1006, 2020. doi: 10.25046/aj0506120
44. Andrea Generosi, Silvia Ceccacci, Samuele Faggiano, Luca Giraldi, Maura Mengoni, "A Toolkit for the Automatic Analysis of Human Behavior in HCI Applications in the Wild", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 6, pp. 185–192, 2020. doi: 10.25046/aj050622
45. Khalid Ait Hadi, Rafik Lasri, Abdellatif El Abderrahmani, "Inferring Topics within Social Networking Big Data, Towards an Alternative for Socio-Political Measurement", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 6, pp. 155–159, 2020. doi: 10.25046/aj050618
46. Pamela Zontone, Antonio Affanni, Riccardo Bernardini, Leonida Del Linz, Alessandro Piras, Roberto Rinaldo, "Supervised Learning Techniques for Stress Detection in Car Drivers", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 6, pp. 22–29, 2020. doi: 10.25046/aj050603
47. Mohammad Mohammad Abdul-Atty, Ahmed Sayed Ismail Amar, Mohamed Mabrouk, "C-Band FMCW Radar Design and Implementation for Breathing Rate Estimation", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 1299–1307, 2020. doi: 10.25046/aj0505156
48. Redha Touati, Max Mignotte, Mohamed Dahmane, "A Circular Invariant Convolution Model-Based Mapping for Multimodal Change Detection", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 1288–1298, 2020. doi: 10.25046/aj0505155
49. Paul Cabacungan, Carlos Oppus, Gregory Tangonan, Nerissa Cabacungan, John Paul Mamaradlo, Neil Angelo Mercado, "Design and Development of Electronic Sensor and Monitoring System of Smart Low-cost Phototherapy Light System for Non-Invasive Monitoring and Treatment of Neonatal Jaundice", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 1233–1246, 2020. doi: 10.25046/aj0505149
50. Chunlai Yan, Hongxia Li, "Knowledge Mapping of Virtual Academic Communities: A Bibliometric Study Using Visual Analysis", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 493–499, 2020. doi: 10.25046/aj050561
51. Hicham Moujahid, Bouchaib Cherradi, Oussama El Gannour, Lhoussain Bahatti, Oumaima Terrada, Soufiane Hamida, "Convolutional Neural Network Based Classification of Patients with Pneumonia using X-ray Lung Images", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, pp. 167–175, 2020. doi: 10.25046/aj050522
52. Adonis Santos, Patricia Angela Abu, Carlos Oppus, Rosula Reyes, "Real-Time Traffic Sign Detection and Recognition System for Assistive Driving", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 600–611, 2020. doi: 10.25046/aj050471
53. Katleho Moloi, Yskandar Hamam, Jacobus Andries Jordaan, "A Support Vector Machine Based Technique for Fault Detection in A Power Distribution Integrated System with Renewable Energy Distributed Generation", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 577–588, 2020. doi: 10.25046/aj050468
54. Samir Allach, Mohamed Ben Ahmed, Anouar Abdelhakim Boudhir, "Deep Learning Model for A Driver Assistance System to Increase Visibility on A Foggy Road", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 314–322, 2020. doi: 10.25046/aj050437
55. Amal Hadri, Khalid Chougdali, Raja Touahni, "Nonlinear \(\ell_{2,p}\)-norm based PCA for Anomaly Network Detection", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 234–243, 2020. doi: 10.25046/aj050429
56. Rizki Jaka Maulana, Gede Putra Kusuma, "Malware Classification Based on System Call Sequences Using Deep Learning", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 207–216, 2020. doi: 10.25046/aj050426
57. Ali Al-Rashid, "Composition of Methods to Ensure Iris Liveness and Authenticity", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 4, pp. 130–143, 2020. doi: 10.25046/aj050417
58. Ruba Obiedat, "Risk Management: The Case of Intrusion Detection using Data Mining Techniques", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 529–535, 2020. doi: 10.25046/aj050365
59. Akram Hatem Saber, Mohd Ayyub Khan, Basim Galeb Mejbel, "A Survey on Image Forgery Detection Using Different Forensic Approaches", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 361–370, 2020. doi: 10.25046/aj050347
60. Jesuretnam Josemila Baby, James Rose Jeba, "A Hybrid Approach for Intrusion Detection using Integrated K-Means based ANN with PSO Optimization", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 317–323, 2020. doi: 10.25046/aj050341
61. Manh Le Tran, Sunghwan Kim, "Enhanced Collaborative Constellation for Visible Light Communication System", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 259–263, 2020. doi: 10.25046/aj050333
62. Sally Almanasra, Ali Alshahrani, "Alternative Real-time Image-Based Smoke Detection Algorithm", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 123–128, 2020. doi: 10.25046/aj050316
63. Gillala Rekha, Shaveta Malik, Amit Kumar Tyagi, Meghna Manoj Nair, "Intrusion Detection in Cyber Security: Role of Machine Learning and Data Mining in Cyber Security", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 3, pp. 72–81, 2020. doi: 10.25046/aj050310
64. Aditi Haresh Vyas, Mayuri A. Mehta, "A Comprehensive Survey on Image Modality Based Computerized Dry Eye Disease Detection Techniques", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 748–756, 2020. doi: 10.25046/aj050293
65. Rabeb Faleh, Souhir Bedoui, Abdennaceur Kachouri, "Review on Smart Electronic Nose Coupled with Artificial Intelligence for Air Quality Monitoring", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 739–747, 2020. doi: 10.25046/aj050292
66. Yeji Shin, Youngone Cho, Hyun Wook Kang, Jin-Gu Kang, Jin-Woo Jung, "Neural Network-based Efficient Measurement Method on Upside Down Orientation of a Digital Document", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 697–702, 2020. doi: 10.25046/aj050286
67. Evan Kristia Wigati, Gede Putra Kusuma, Yesun Utomo, "Combination of Salient Object Detection and Image Matching for Object Instance Recognition", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 584–591, 2020. doi: 10.25046/aj050273
68. C. Namrata Mahender, Ramesh Ram Naik, Maheshkumar Bhujangrao Landge, "Author Identification for Marathi Language", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 432–440, 2020. doi: 10.25046/aj050256
69. Dr. Minal Moharir, Karthik Bhat Adyathimar, Dr. Shobha G, Vishal Soni, "Scapy Scripting to Automate Testing of Networking Middleboxes", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 293–298, 2020. doi: 10.25046/aj050238
70. Nova Muhammad Ferlansyah, Suharjito, "A Systematic Literature Review of Vessel Anomaly Behavior Detection Methods Based on Automatic Identification System (AIS) and another Sensor Fusion", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 2, pp. 287–292, 2020. doi: 10.25046/aj050237
71. Brian Meneses-Claudio, Witman Alvarado-Diaz, Avid Roman-Gonzalez, "Classification System for the Interpretation of the Braille Alphabet through Image Processing", Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 1, pp. 403–407, 2020. doi: 10.25046/aj050151
72. Noor Syahirah Nordin, Mohd Arfian Ismail, Vitaliy Mezhuyev, Shahreen Kasim, Mohd Saberi Mohamad, Ashraf Osman Ibrahim, "Fuzzy Modelling using Firefly Algorithm for Phishing Detection", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 6, pp. 291–296, 2019. doi: 10.25046/aj040637
73. Farah Nadia Ibrahim, Zalhan Mohd Zin, Norazlin Ibrahim, "Eye Feature Extraction with Calibration Model using Viola-Jones and Neural Network Algorithms", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 6, pp. 208–215, 2019. doi: 10.25046/aj040627
74. Niranjan A, Akshobhya K M, P Deepa Shenoy, Venugopal K R, "EKMC: Ensemble of kNN using MetaCost for Efficient Anomaly Detection", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 5, pp. 401–408, 2019. doi: 10.25046/aj040552
75. Michael Santacroce, Daniel Koranek, Rashmi Jha, "Detecting Malicious Assembly using Convolutional, Recurrent Neural Networks", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 5, pp. 46–52, 2019. doi: 10.25046/aj040506
76. Antonio Fuduli, Pierangelo Veltri, Eugenio Vocaturo, Ester Zumpano, "Melanoma detection using color and texture features in computer vision systems", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 5, pp. 16–22, 2019. doi: 10.25046/aj040502
77. Yuto Yoshizawa, Yutaka Watanobe, "Logic Error Detection System based on Structure Pattern and Error Degree", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 5, pp. 01–15, 2019. doi: 10.25046/aj040501
78. Stephen Craig Stubberud, Kathleen Ann Kramer, Allen Roger Stubberud, "Estimation of Target Maneuvers from Tracked Behavior Using Fuzzy Evidence Accrual", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 4, pp. 468–477, 2019. doi: 10.25046/aj040457
79. Takahiro Ishizu, Makoto Sakamoto, Masamichi Hori, Takahiro Shinoda, Takaaki Toyota, Amane Takei, Takao Ito, "Hidden Surface Removal for Interaction between Hand and Virtual Objects in Augmented Reality", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 4, pp. 359–365, 2019. doi: 10.25046/aj040444
80. Maryam Butt, Golshah Naghdy, Fazel Naghdy, Geoffrey Murray, Haiping Du, "Investigating The Detection of Intention Signal During Different Exercise Protocols in Robot-Assisted Hand Movement of Stroke Patients and Healthy Subjects Using EEG-BCI System", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 4, pp. 300–307, 2019. doi: 10.25046/aj040438
81. Priyamvada Chandel, Tripta Thakur, "Smart Meter Data Analysis for Electricity Theft Detection using Neural Networks", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 4, pp. 161–168, 2019. doi: 10.25046/aj040420
82. Sohail Akhtar, Adarsh Tandiya, Medhat Moussa, Cole Tarry, "An Efficient Automotive Paint Defect Detection System", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 3, pp. 171–182, 2019. doi: 10.25046/aj040323
83. Mohammad Ahmar Khan, Sarfraz Fayaz Khan, Taher Alawi Taher Barham BaOmar, Abdul Rahman Mohammed Aqeel Ba Omar, "Development & Implementation of Smart Vehicle Over Speeding Detector using IoT", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 2, pp. 170–175, 2019. doi: 10.25046/aj040222
84. Viorel Lupu, "Web Authentication: no Password; Listen and Touch", Advances in Science, Technology and Engineering Systems Journal, vol. 4, no. 1, pp. 84–92, 2019. doi: 10.25046/aj040109
85. Zheng Xie, Chaitanya Gadepalli, Farideh Jalalinajafabadi, Barry M.G. Cheetham, Jarrod J. Homer, "Machine Learning Applied to GRBAS Voice Quality Assessment", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 6, pp. 329–338, 2018. doi: 10.25046/aj030641
86. Elena Basan, Alexander Basan, Oleg Makarevich, "Probabilistic Method for Anomalies Detection Based on the Analysis of Cyber Parameters in a Group of Mobile Robots", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 6, pp. 281–288, 2018. doi: 10.25046/aj030636
87. Satyam Paul, Raheleh Jafari, "Recent Advances in Intelligent-Based Structural Health Monitoring of Civil Structures", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 5, pp. 339–353, 2018. doi: 10.25046/aj030540
88. Jia-Jing Kao, Chun-Liang Lin, Chih-Cheng Huang, Hau-Shian Jian, "Contactless Power and Bidirectional Data Transmission via Magnetic Field", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 5, pp. 226–234, 2018. doi: 10.25046/aj030528
89. Mohammed Faeik Ruzaij Al-Okby, Sebastian Neubert, Norbert Stoll, Kerstin Thurow, "Development and Testing of Intelligent Wheelchair Controller for Quadriplegic Patients", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 5, pp. 220–225, 2018. doi: 10.25046/aj030527
90. Andre Dehne, Nantwin Moller, Thorsten Hermes, "MARWIN: Localization of an Inspection Robot in a Radiation exposed Environment", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 4, pp. 354–362, 2018. doi: 10.25046/aj030436
91. Mohamed Abd Elghany Khalifa, Amr Elsayed Emam, Mohamed Ibrahim Youssef, "Performance Enhancement of MIMO-OFDM Using Redundant Residue Number System", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 4, pp. 1–7, 2018. doi: 10.25046/aj030401
92. Naoki Kimura, Yuya Takeda, Yoshifumi Tsuge, "Agent Based Fault Detection System for Chemical Processes using Negative Selection Algorithm", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 2, pp. 90–98, 2018. doi: 10.25046/aj030211
93. Arlinda Alimehaj Rrecaj, Marija Malenkovska Todorova, "Estimating short time interval densities in a CTM-KF model", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 2, pp. 85–89, 2018. doi: 10.25046/aj030210
94. Yi Yi Aung, Myat Myat Min, "An Analysis of K-means Algorithm Based Network Intrusion Detection System", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 1, pp. 496–501, 2018. doi: 10.25046/aj030160
95. Naima Amrouche, Ali Khenchaf, Daoud Berkani, "Tracking and Detecting moving weak Targets", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 1, pp. 467–471, 2018. doi: 10.25046/aj030157
96. Himanshu Upadhyay, Hardik Gohel, Alexander Pons, Leo Lagos, "Virtual Memory Introspection Framework for Cyber Threat Detection in Virtual Environment", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 1, pp. 25–29, 2018. doi: 10.25046/aj030104
97. El Mostapha Chakir, Mohamed Moughit, Youness Idrissi Khamlichi, "Building an Efficient Alert Management Model for Intrusion Detection Systems", Advances in Science, Technology and Engineering Systems Journal, vol. 3, no. 1, pp. 18–24, 2018. doi: 10.25046/aj030103
98. Faten Ayadi, Mongi Lahiani, Nabil Derbel, "Kalman filter Observer for SoC prediction of Lithium cells", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 4, pp. 180–188, 2017. doi: 10.25046/aj020424
99. Anum Mehmood, M. Usman Akram, Anum Tariq, Ayesha Fatima, "A Comparison of Mean Models and Clustering Techniques for Vertebra Detection and Region Separation from C-Spine X-Rays", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 3, pp. 1758–1770, 2017. doi: 10.25046/aj0203215
100. Weihua Li, Chiman Kwan, "A Novel Approach to Sensor and Actuator Integrity Monitoring and Fault Magnitude Reconstruction", Advances in Science, Technology and Engineering Systems Journal, vol. 2, no. 3, pp. 1748–1757, 2017. doi: 10.25046/aj0203214