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Detect of Railroad using Image Processing and Applying it on Syrian Railways
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Detect of Railroad using Image Processing and Applying it on Syrian Railways
1.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 02 | Feb 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 912 Detect of Railroad using Image Processing and Applying it on Syrian Railways Razan Fattal1, Abdel Mounem Alabdullah2, Mohamad Najib Salaho3, Yahia Fareed4 1PHD Student Dept. of Telecommunication, College of Electrical & Electronics Engineering, University of Aleppo, Aleppo, Syria. 2Professor, Dept. of Telecommunication, College of Electrical & Electronics Engineering, University of Aleppo, Aleppo, Syria 3Professor, Dept. of Telecommunication, College of Electrical & Electronics Engineering, University of Aleppo, Aleppo, Syria 4Professor, Dept. of Telecommunication, College of Electrical & Electronics Engineering, University of Aleppo, Aleppo, Syria ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - Recently, the use of computer vision has increased in all fields. It helps in detecting objects, and faults in railway transport systems. It can also assist in monitoring that status of the railway using data obtained by cameras and smart sensors. Given the importance of rail transport in general, and in Syria in particular, efforts are being made to develop monitoring systemstoallow monitoringtherailway, especially after the Syrian railway network was sabotaged. In this research, a database was adopted to perform digital image processing operations, which consists of real video clips that were captured through a camera installed at the front of the locomotive for one of the railways in Syria, in order to discover, identify and monitor the two lines of the railway network. A series of digitalimageprocessingapplicationshave been used on images clipped from a video file, and the rail line bends have been detected under various lighting conditions. The experimental results have been analyzed and it has been shown that the proposed method has accurate and effective results. Key Words: Computer Vision- Curve Detection- Image Processing- Railway Detection 1.INTRODUCTION Monitoring the status of railways has a direct effect on the safety of the track. This task is usually provided in a manpower-based manner. However, there are some disadvantages in terms of cost and good results1. In recent years, technological progress has led to the development of manpower-based methods in this field. With the lower costs for computers and electronic devices andthedevelopmentof software technologies, railway monitoring techniques provide more effective and reliable results. There are many studies in the field of railway computer vision monitoring2,3. image processing is a branch of computer science Informatics, concerned with performing operations on images with the aim of improving them according to specific criteria or extracting some information from them. Rail transport is one of the commonly used modes of transport. Compared to other modes of transportation, rail traffic is very important. Multiple locomotives run continuously on one or two lines4. In spite of various and various research efforts in this field, there are still difficulties regarding images processing of complex scenes with changing lighting conditions, low contrast, blurry backgrounds5. Other difficultiesexistwhenitcomestodetect lines Rail-road using image processing and recognition systems6. Most research focused on studying twodirections: the first direction depends onto distinguish the railwaylines in order to monitor their conditions7. The second direction depends on the use of digital image processing techniques and computer vision in railway networks within smart systems8. As in any digital image processing system, choosing thecolor space for processing constitutes is the most important stage. In thisstudy, a new method based on image processingusing Python and OpenCV environment is presented to detect railways. The proposed method consists of three main parts including preprocessing and feature extraction. At the start, traditional image processing methods were used, which are consisting of six successive stages: get the image (image acquisition) By a light sensor (for example, a camera, a laser sensor, etc.). pretreatment(pre-processing) Suchasfiltering the image from noise or converting it to a binary image cropping image (segmentation) To separate important information (eg any object in the image) from the background. Feature extraction (features extraction) or attributes. Features rating Link it to the pattern you return to and identify patterns. Understanding the picture (image understanding). Then Canny Edge algorithm is used to detect and extract the edges of the railway. Finally, the Hough transform method is used in the processing stage of the extracted features. As a final result, the railroad tracks are obtained clearly and with great accuracy on the image.Taking into account the slopeof each straight line and thus, the railways are revealed. The proposed image processing method in this research is very
2.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 02 | Feb 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 913 fast, as it was found that the proposed method gives quick and successful results. 1.1 Previous studies: Many studies exist to detect the two-line railways. Karakose and others proposed awayofseeingtherailwaytodetermine the lines and their bends1. In this study, a computer-based visual rail condition monitoring is proposed. By means of a camera placed on top of the train the rail that the train is on and the neighbor rail images are taken. Singha and others explorethepossibilitiesofcomputervision-basedmonitoring through drone imagery. The experimental results ensured that the proposed method provide high reliability and accuracy10. The discovery of the railway components was carried out as in11, 12. The researchers here detected failures in real time on the railway surface by developing a contactlessmethodbasedon image processing. The railway surface was detected by extracting a portion of the railway images. The faults of the detected rod surfaces were determined using the contrast enhancement method. This method onlyallowsdetectingthe surface of the rail and identifying surface faults13. Trinh and others suggested an integration and optimization method withmultiplesensorsforrailwayinspection14.Inthe proposed method, distance measuring devices were used to identify railway objects with multiple cameras. With this method, failures such as parts defects, alignment, surface failureand inclination were identified during rail inspection. 2. Materials and Methods: 2.1 Research importance: Computer vision-based railway monitoring methods are possible using data obtained with the help of computers and the digital processing of the captured images. This research proposes to monitor the state of the railway visually by means of a camera placed on the top-front of the train. The track on which the train is running, and the pictures of the neighboring railways are captured. Edge and feature extraction are applied on the captured images to identify the rails. The contribution of this researchliesinrestoringthesafetyof the traffic of the Syrian railway network, because of the global and local importance of rail transportation. This will help running freight and passenger trains to the maximum capacity over these railways. The video image processor is a combination of methods that are extracted to process the data provided by the imaging sensor which is a camera placed at the front-top of the train15. The operator sets several railroad detection areas within the field of view forthe camera.Then,real-timeimageprocessing algorithmsare applied to these regionsinordertoextractthe required information, such as the path of the two railway tracks and the curves of the track. The advantages of this method are that the camera is mounted to the front of the locomotive rather than to the road. In this way, detection defects caused by shadows, weather and reflections can be overcome. 2.2 Search objective: Applyingreal-timeimageprocessingalgorithmsusingPython and Open CV library to discover fails in the two railways a moving locomotive using camera fixed on the front-top of it. This research comes from the requirements of the railway reality in the Syrian RailwaysGeneral Corporationtoachieve the safety of rail traffic. This is important to guarantee reliable rail transportation of shipping goods and fuel, especially the Syrian Railways General Corporation is carrying a massive reconstruction and rehabilitation of the railways, after the huge damage they suffered from because of the current conflict in country. Hence the importance of this research is toachieve optimal control of therailwaywith tracking bends, through the digital image processing using real time camera. The novelty in this research lies in discovering the two railways in a clear way, with the focus on detecting bends during the movement of the train, in real time, by installing a tracking camera on the head of the train. 2.3 Search method: The captured images of the railway are processed using Python and Open CV library. ..Each video frame is converted into a series of images. The images are sent through a set of filters and convert them intodigital images (frames)Inorder to optimally determine the two railway lines with the bends of the lines through a set of stages, but at first a set of pre- treatment operations is carried out. 2.4 Initialization: In order to reduce the human input and the number of parameters required, an initialization process is carried out for each train. After that the system will keep the configuration file and update it automatically. The only human intervention required during this process is to determine the gap between the rails and the left rail start position, as explained below, at which point a trigger is used. 2.5 Determining the starting position of the rails: The starting location of the rails should be determined to create windows from the bottom to the top. This method assumes that the gap between the rails is fixed. To make it work in real time, the algorithm must become linear, and to do that, a sliding pair of windows has been created, so that the gap between windows is the same as the gap between bars and is read from the configuration file.
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 02 | Feb 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 914 2.6 Image processing steps: Images of the railway captured via the camera are processed According to the stages shown in Fig 2. The stages are explained in more details in the coming sections. Fig -1: shows the workflow of processing the captured images using the camera fixed at the head of the locomotive Figure 2 shows example of the captured image that is ready to be processed from Syrian Railways: Fig -2: Basic image captured from the camera fixed on the front of Syrian locomotive Frame Size Adjustment (Resize): This modification is done using the. method cv2.resize() Where the image size can be determined manually or by scaling factor Image stack: It is used to serialize and deserialize the structure of a Python object, so that any object can be stored in Python and saved to disk. The stack first renderstheobject as a string before writing it to the file, by converting it to a string of characters. Distortion processing Caused by the camera: Some cameras cause significant image distortion. There are two main types of distortion, radial distortion and transverse distortion. Processing the image in gray level: A set of operations were performed on the image, as shown in the following Figure 3. Video frames are converted from RGB to grayscale because processing a single channel image is faster than processing a three-channel color image, especially most of the significant information is in the luminance part of the image, not in the chrominance parts. Fig -3: The railway image after converting to grayscale Noise Reduction: Noise can create false edges, so before moving forward, it is necessary to perform imagesmoothing. The filter used here is Gaussian. Figure 4 shows the image after applying Gaussian filter.
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 02 | Feb 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 915 Fig -4: The railway image after applying Gaussian filter Applying edge detection using Canny algorithm edge Detector: Edge detection using Canny is a famous algorithm for defining edges. Figure 5 shows the image after applying Canny method for edge detection. Fig -5: The railway image after applying Canny Edge Detector. Determine the region of interest (ROI): This stage only take into consideration theareacoveredbytheroadcorridor. A mask with the same dimensions of the railway image is created. A bitwise AND operation isperformedBetweeneach pixel of the image and the mask. finally hides the image without the two train lines and shows the region of interest traced by the polygonal contour ofthemask.Herethemaskis used as a triangle, as shown in Figure 6. Fig -6: The railway image after extracting a region of interest Erosion process: This process is used to smooth the front surface limits. Fig 7 shows the image after applying Erosion process. Fig -7: The railway image after applying erosion operation Stretching Dilation process: It is the opposite process corrosion area. Usually after applying the erosion processto remove the noise of the white area in the picture, the body area is decreased. For that erosion process is followed by a stretching process to increase the area and restore its eroded parts. As a result of converting the color image to gray level and then applying the Canny algorithm and determining the region of interest, unfilled voids in the railway lines have appeared. For that the use of erosion and expansion filters are essential to get a more accurate result, as shown in Figure 8.
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 02 | Feb 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 916 Fig -8: The railway image after applying dilation operation. Convert the image to color space HSV (hue, saturation, value): There are many available methods to convert a grey image to color spaces. In this paper, the image is converted to gray for processing, then converted to HSV color space (hue, saturation, value). Bit-level operations (Bitwise operation): It includes operations NOT, XOR, OR, AND. These operations are very useful when determining which part of the image is not rectangular and here the images were combined using the instruction Bitwise OR. Perspective adjustment: perspective transformation standardization scaling: It is the process of determining the size of the image dimensions, through the function cv2.resize. Obtaining the required curvature: here the basic image is used with a curvature point from the left and a curvature point from the right according to the following function polyfit Figure 9: The final result. Fig -9: The final result. Discuss the results: Using the stages described above, on images captured using the camera at the front of the moving locomotiveinreal time shows that the proposed image processing method can detect two railroad tracks with great accuracy. The stages and steps that are performed, and the results of the image processing show that the image obtained in this way is characterized by great clarity and high accuracy ,in addition to the speed of image processing in this paper compared to other methods mentioned in the previous studies. Through the experimental resultsinthisresearchtomonitor and identify the two railway tracks, the two railway tracks were detected and the railway surface was monitored. Compared with similar studies, it's been found that no method has been developed to detect railway components and monitor railway surface failures andtheconditionofthe railway line in real time and during the movement of the locomotive. The method proposed in this research has been compared with some related previous studies as shown table 1. Table-1: Comparison of the proposed image processing method with other studies. processing time(ms) standard deviation(ms) Image size(pixel) Suggested method for searching 125 2.1 480×360 Ref[ 11] 1064.6 2.3 640*480
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 02 | Feb 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 917 Ref[ 12] 247 4.1 512*832 Ref[ 13] 120 2.5 320*240 Ref[ 14] 100 1.7 220*220 From the previous table, the components of the railway, the surface of the railway and its direction on the railway were revealed. The dimensions and processing time of the image were given to discover the railway track. Looking at the processing time and image dimensions for the references mentioned in table 1, it’s been found that the proposed method is successful and achieved a high speed of image processing and high image accuracy and clarity. 3. CONCLUSIONS This paper considers monitoring the conditions of Syrian railways in real time using camera mounted at the front of a moving locomotive. This study proposes a new method of image processing to detect the two railway lines, which they are the most important components of the railway. In the proposed method for discovering railway components, edge extraction was performed on imagescapturedfromacamera mounted at the front of a moving locomotive. The straight lines in the picture were classified and the image was processed using Python after the video was cut into frames according to gray-level image processing techniques, and then HSV the two stages are complementary to each other, and an adjustment process has been made to the image size to obtain the final version of the image. The benefit of the proposed research method, is it can be applied to a video clip and not only a static image. In addition to the possibility of discovering curves and thus discovering the entire rails of the railway and identifying them clearly and accurately along the train track even with the presence of curves. The other important point of this research is that there is no need to consider the conditions of environment brightness and its impact on image processing. The results show that the proposed method exceeds other methods in terms of speed of processing and accuracy. The proposed method is an effective alternative for railways. Future prospects and suggestions: This research relied on image processing techniques to detect railways. Techniques such as AI and deep learning techniques can be used to process the image from a moving video in real time to improve the results further and detect obstacles and malfunctions possible acquisition of the two railway lines. ACKNOWLEDGEMENT - This work was approved by Dept of Telecommunication and Computer science university of Aleppo Authors' declaration - All the Figuresand Tables in themanuscriptaremineours. - Ethical Clearance: The project was approvedbyUniversity of Aleppo. REFERENCES [1]. Karakose M, Yaman O, Baygin M, Murat K, Akin E. A New Computer Vision Based Method for Rail Track Detectionand Fault Diagnosis in Railways . International Journal of Mechanical Engineering and Robotics Research .2017 JAN 1;6(1). [2]. Parlakyıldız S, Gencoglu MT, Cengiz MS. ANALYSIS OF FAILURE DETECTION AND VISIBILITY CRITERIA IN PANTOGRAPH-CATENARY INTERACTION. Light & Engineering. 2020;28(6): 127–135. [3]. Karakose M, Yaman O, Murat K, Akin E. A New Approach for Condition Monitoring and Detection of Rail Components and Rail Track in Railway. International Journal of Computational Intelligence Systems. 2018;11: 830–845. [4]. SANTUR Y, KARAKOSE M, Akın E. An adaptive fault diagnosis approach using pipeline implementation for railway inspection. Turkish Journal of Electrical Engineering & Computer Sciences .2018;26: 987-998. [5]. MathWorks,( 2017),"Convert from YCbCr to RGB Color Space". [Online].Available: ttps://www.mathworks.com/help/images/convert-from- ycbcr-to-rgb-color-space.html?requested Domain=www.mathworks.com [6]. Nugroho HA, Goratama RD, Frannita EL. Face recognition in four types of colour space: a performance analysis. IOP Conference Series: Materials Science and Engineering. 2021. [7]. Onat E. FPGA implementation of real time video signal processing using Sobel, Robert, PrewittandLaplacianfilters. In2017 25th Signal Processing and Communications Applications Conference (SIU) 2017 May 15 (pp. 1-4). IEEE. [8]. Qin Y, Jia L, Liu B, Liu Z, Diao L, An M. Proceedings of the 4th International Conference on Electrical and Information Technologies for Rail Transportation (EITRT) .Springer. 2021. [9]. Singha AK, Swarupa A, Agarwalb A, Singh D. Vision based rail track extraction and monitoring through drone imagery. The Korean Institute of Communications and Information Sciences (KICS). 2019. [11]. Karaköse M, Yaman O, Erhan AK. Real time implementation for faultdiagnosisandconditionmonitoring approach using image processing in railway switches.
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 02 | Feb 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 918 International Journal of Applied Mathematics Electronics and Computers. 2016 Sep 1(Special Issue-1):307-13. [12]. Xia Y, Xie F, Jiang Z. Broken railway fastener detection based on adaboost algorithm. In2010 International Conference on Optoelectronics and Image Processing 2010 Nov 11 (Vol. 1, pp. 313-316). IEEE. [13]. Li Q, Ren S. A real-time visual inspection system for discrete surface defects of rail heads. IEEE Transactions on Instrumentation and Measurement. 2012 Feb 10;61(8):2189-99. [14]. Trinh H, Haas N, Pankanti S. Multisensor evidence integration and optimization in rail inspection. InProceedings of the 21st International Conference on Pattern Recognition (ICPR2012)2012Nov11(pp.886-889). IEEE. [15]. Tastimur C, Karakose M, Akin E. Image processing based level crossing detection and foreign objects recognition approach in railways. International Journal of Applied Mathematics Electronics and Computers. 2017 Aug(Special Issue-1):19-23.
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