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Live Sign Language Translation: A Survey
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 1024 Live Sign Language Translation: A Survey Aditya Dawda1, Aditya Devchakke2, Avdhoot Durgude3 1Student, Dept. of Computer Science and Engineering, MIT School of Engineering, Maharashtra, India 2Student, Dept. of Computer Science and Engineering, MIT School of Engineering, Maharashtra, India 3Student, Dept. of Computer Science and Engineering, MIT School of Engineering, Maharashtra, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - Languages are the basic need for communication, sharing of knowledge, emotions and thoughts. As language is a verbal, persons having hearing or speaking disabilities use various gestures to communicate with others. Thus, it is known as ‘sign language', it has its own patterns and variables. It always becomes hard for a person who uses sign language for communication with others .Additionally, there exists various sign languages, mainly American Sign Language (ASL),British, Australian and New Zealand Sign Language (BANZSL),Chinese Sign Language (CSL),French Sign Language (LSF) and Japanese Sign Language (JSL).By using concepts of Human Computer Interaction (HCI) LSTM(Long Short Term Memory) networks were studied and implemented for classification of gesture data because of their ability to learn long-term dependencies. This paper presents the recommendation system/model to translate facial and hand gestures of Sign Languages into English Language. Most of the search was based on CNN or variants of CNN (Convolutional N), SVM, KNN and TensorFlow Library based models and images of gestures in black and gray form were feeded to these models for prediction of sign language. No facial or body pose were used in the search, so our study concluded most of the models were static in nature as they process only one frame and only one body part. Key Words: American sign language, Computer Vision, Convolutional Neural Network, Deep Learning Model, Gesture recognition, LSTM, Media pipe Holistic. 1. INTRODUCTION This paper studies the problem of vision-based Sign Language Translation (SLT), which bridges the communication gap between the deaf mute and normal people. It is related to several video understanding topics that targets to interpret video into understandable text and language. Sign Language is a gesture language which visually transmits sign patterns using hand-shapes, orientation and movements of the hands, arms or body, facial expressions and lip-patterns to convey word meanings instead of acoustic sound patterns. Different sign languages exist around the world, each with its own vocabulary and gestures. A lot of research has been done with respect to Sign Language Translation Some examples are ASL (American Sign Language) [1], GSL (German Sign Language), BSL (British Sign Language), and so on. There are approximately 6000 gestures of ASL for common words, using fingers to communicate obscure words or proper nouns. This language is commonly used in deaf communities, including interpreters, friends, and families of the deaf, as well as people who are hard of hearing themselves. However, these languages are not commonly known outside of these communities, and therefore communication barriers exist between deaf and hearing people. Hand gestures are nonverbal communication methods for these people. It becomes very difficult and time consuming to exchange the information or feelings for a person who uses sign language to communicate with other non-users. One can make use of devices which translate sign language into words, but this is not an effective way as it can have huge costs and need maintenance. The main aim of our research is to form an effective way of communication between the people using sign language and the English language. Recognition varies from researcher to researcher based on the method they use to conduct their research and the model they built their application on [6]. This paper can help other researchers to have an idea of the methods used previously; they get to know about the pros of the earlier research and cons which previous research could not overcome. Further they can make use of this data to make changes in their system for achieving higher accuracy, also they will get an idea to make a plan for building models, making complex calculations in various ways in order to get the desired results. The problem of developing sign language recognition ranges from data collection to building an effective model for image recognition. Using a camera can be ineffective as there are many noises associated with it which leads to a lot of image pre-processing while using a sensor-based approach can be costly and not feasible for every researcher. There are some classifiers which classify
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 1025 alphabets of English but no phrases translation is done by them and vice -versa. 2. LITERATURE SURVEY Purpose of reviewing literature is to find out different approaches and methods applied by the authors for translating sign language into English language. Various models are studied for image processing and image classification. Following table presents the research of different authors in this field: Table -1.1: Literature paper-1 [1] Title American Sign Language Recognition System: An Optimal Approach. Author Shivashankara S, Srinath S [1]. Publication International Journal of Image, Graphics and Signal Processing, Aug 2018 Result/ Accuracy ASL alphabets A-Z (26) and numbers 0- 9 (10) are recognized with 93.05% accuracy. Table -1.2: Literature paper-2 [2] Title Vision-based Portuguese Sign Language Recognition System. Author Paulo Trigueiros, Fernando Ribeiro, Luís Paulo Reis [2] Publication Springer Science and Business Media LLC, April 2014. Result/ Accuracy Sixteen models were compared based on precision, recall, accuracy, activation function, and AROC. The variance in most models was analogous. Accuracy: 74%, Precision: 78% , Recall: 68%. Table -1.3: Literature paper-3 [3] Title A Comprehensive Analysis on Sign Language Recognition System Author Rajesh George Rajan, M Judith Leo [3] Publication International Journal of Recent Technology and Engineering (IJRTE), March 2019 Result/ Accuracy Different Acquisition methods like SVM, HMM, SVM+ANN, PCA+KNN, MLP+MDC, Polynomial classifier and ANFIS for sign language recognition. Table -1.4: Literature paper-4 [4] Title Intelligent Hand Cricket. Author Aditya Dawda, Aditya Devchakke[4] Publication Cyber Intelligence and Information Retrieval 2021, Springer Result/ Accuracy CNN based hand gesture recognition for playing hand cricket games with 97.76% training and 95.38% validation accuracy. Table -1.5: Literature paper-5 [5] Title Conversion of sign language into text Author Mahesh Kumar N B [5] Publication International Journal of Applied Engineering Research (2018) Result/ Accuracy Recognizing Indian sign language with MATLAB, total of 10 images of each alphabet has been taken. It used Linear Discriminant Analysis (LDA), because LDA reduces dimensionality ultimately reducing noise, and achieving higher accuracy.
3.
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 1026 Table -1.6: Literature paper-6 [6] Title Hierarchical LSTM for Sign Language Translation Author Dan Guo, Wengang Zhou, Houqiang Li, Meng Wang [6] Publication The Thirty-Second AAAI Conference on Artificial Intelligence (AAAI-18) Result/ Accuracy Hierarchical-LSTM framework for sign language translation, which builds a high- level visual semantic embedding model for SLT. It explores visemes via online variable-length key clip mining and attention-aware weighting.. Conclusion This study presents three distinct ways that enable the choice of selecting a solution in specific situations. K-Means, DBSCAN, and Hierarchical clustering all have certain types of drawbacks that render them unsuitable when used solely. Table -1.7: Literature paper-7 [7] Title Sign language recognition system using CNN and Computer Vision Author MehreenHurroo, Mohammad ElhamWalizad [7] Publication International Journal of Engineering Research & Technology (IJERT), December 2020 Result/ Accuracy CNN based model for classifying ASL with 10 alphabets having accuracy above 90% (with gloves), HSV color algorithm for detecting gesture. The dataset is self- created with 80:20 split Table -1.8: Literature paper-8 [8] Title Improving Sign Language Translation with Monolingual Data by Sign Back- Translation Author Hao Zhou1 Wengang Zhou1, Weizhen Qi1 Junfu Pu1 Houqiang Li1[8] Publication CVPR 2021 Result/ Accuracy In this paper they propose to improve the translation quality with monolingual data, which is rarely investigated in SLT. By designing a Sign BT pipeline, they converted massive spoken language texts into source sign sequences. The synthetic pairs are treated as additional training data to alleviate the shortage of parallel data in training. Table -1.9: Literature paper-9 [9] Title Research of a sign language translation system based on deep learning Author Siming He [9] Publication Conference on artificial intelligence and advanced manufacturing ,2019 Result/ Accuracy Faster R-CNN with an embedded RPN module is used with accuracy of 91.7%, he used 3D CNN for feature extraction and sign language recognition framework consisting of LSTM Table -1.10: Literature paper-10 [10] Title Sign Language Translator Author Divyanshu Mishra, MedhaviTyagi, and AnkurVerma, Gaurav Dubey[10] Publication International Journal of Advanced Science and Technology (2020) Result/ The classification model provides an
4.
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 1027 Accuracy accuracy of 93% on the validation set and the translation of gestures to the English language is happening smoothly frame by frame. However, the system working on a computer is not flexible as the user has to carry the computer wherever he or she goes. Table -1.11: Literature paper-11 [11] Title Multi-Modality American Sign Language Recognition Author ChenyangZhang,YingliTian,Matt Huenerfauth [11] Publication Rochester Institute of Technology RIT Scholar Works,9-2016 Result/ Accuracy This learns from labelled ASL videos captured by a Kinect depth sensor and predicts ASL components in new input videos, words are divided into 4 groups according to their frequencies. The combined accuracy is 36.07% with 99 lexical items Table -1.12: Literature paper-12 [12] Title Real-Time American Sign Language Recognition with Faster Regional Convolutional Neural Networks Author S. Dinesh,S. Sivaprakash [12] Publication International Journal of Innovative Research in Science, Engineering and Technology, March 2018 Result/ Accuracy They are able to interpret isolated hand gestures from the Argentinian Sign Language (LSA) with r-CNN model having accuracy of 93.33% Table -1.13: Literature paper-13 [13] Title Recognition of Single-Handed Sign Language Gestures using Contour Tracing Descriptor Author Rohit Sharma, YashNemani, Sumit Kumar [13] Publication Proceedings of the World Congress on Engineering 2013 Vol II, WCE 2013, July 3 - 5, 2013, London, U.K. Result/ Accuracy They use classifiers (Support Vector Machines and k-Nearest Neighbors) to characterize each color channel after background subtraction. The change is using a contour trace, which is an efficient representation of hand contours. The accuracy of 62.3% is achieved using an SVM on the segmented color channel model. Table -1.14: Literature paper-14 [14] Title Hand gesture recognition based on dynamic Bayesian network framework Author H suk,bongkee sin [14] Publication Korea university 2010 Result/ Accuracy Dynamic Bayesian network-based inference is.10 isolated gestures, they attempt to classify moving hand gestures having 99% accuracy Table -1.15: Literature paper-15 [15] Title SIGN LANGUAGE RECOGNITION: STATE OF THE ART Author Ashok K Sahoo, GouriSankar Mishra and Kiran Kumar Ravulakollu[15] Publication ARPN Journal of Engineering and Applied Sciences, VOL. 9, NO. 2, FEBRUARY 2014 Result/ Lifeprint Fingerspell Library data set is
5.
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 1028 Accuracy used with 87.64 accuracy Table -1.16: Literature paper-16 [16] Title Sign Language Translation Using Deep Convolutional Neural Networks Author RahibH.Abiyev , Murat Arslan and John Bush Idoko [16] Publication KSII Transactions on Internet and Information Systems VOL. 14, NO. 2, Feb. 2020 Result/ Accuracy Model is divided into three parts (SSD, Inception v3 and SVM) which are then integrated in one model with 99.90 % accuracy. Table -1.17: Literature paper-17 [17] Title Sign Language Recognition using Convolutional Neural Networks Author Lionel Pigou, Sander Dieleman [17] Publication Ghent University, ELIS, Belgium,2015 Result/ Accuracy Aims to classify 20 Italian gestures from the ChaLearn 2014 using Microsoft Kinect with accuracy of 91.7 Table -1.18: Literature paper-18 [18] Title Indian Sign Language Recognition System Author Yogeshwar I. Rokade, Prashant M. Jadav [18] Publication ResearchGate 2017 Result/ Accuracy In this paper they worked on Indian sign language using ANN and it also supports vector machines. For feature extraction, central moments and HU moments are used, Artificial Neural Networks are used to classify the sign which gives average accuracy of 94% and SVM gives accuracy of 92%. Table -1.19: Literature paper-19 [19] Title Sign language Recognition Using Machine Learning Algorithm Author Prof.Radha S. Shirbhate, Mr. Vedant D. Shinde, Ms. Sanam A. Metkari, Ms. Pooja U. Borkar,Ms. Mayuri A. Khandge[19] Publication International Research Journal of Engineering and Technology (IRJET)2020 Result/ Accuracy In this paper they have gone through an automatic sign language gesture recognition system in real-time, using different tools. Also, they proposed work expected to recognized the sign language and convert it into the text. Table -1.20: Literature paper-20 [20] Title A Survey on Sign Language Recognition Systems Author Shruty M. Tomar, Dr.Narendra M. Patel,Dr. Darshak G. Thakore [20] Publication International Journal of Creative research Thoughts (IJCRT) 2021
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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 1029 Result/ Accuracy In This they Study various classification techniques concludes that deep neural network (CNN, Inception model, LSTM) performs better than traditional classifiers such as KNN and SVM. Table -1.21: Literature paper-21 [21] Title Sign language recognition system based on prediction in Human-Computer Interaction Author Maher Jebali, Patrice Dalle, and Mohamed Jemni[21] Publication ResearchGate 2014 Result/ Accuracy The integrated framework is used for head and hand tracking in videos of SL, it is in fact employed in prediction based SLR. Con-cerning the detection of different components, 3. OBSERVATIONS: As the above table explains there are various methods/models to detect the sign language [3]. One thing which is frequently observed was the quantity and quality of data set used to train the model [15]. When the dataset size is increased the person reaches more to the desired accuracy. Quality of data set affects the model exponentially, where there is dataset made by web cam, data set of any higher resolution, data augmentation, data set with continuous videos changes the accuracy. Out of the 21 papers reviewed most of the papers are based on CNN or CNN integrated models for image classification. Various approaches like convolutional neural network (CNN), Region based convolutional neural network(r-CNN) [12], K-nearest Neighbors (KNN) [13], Dynamic Bayesian network (DBN) [14], Support vector machines (SVM) [13][18], Matlab with Linear discriminant analysis (LDA) [5]. LSTM based model to capture the important features and discard unwanted features based on past features is used by the author of this paper to bridge the gap between the research as conventional methods process each frame independently and not based on the information generated from past steps. The accuracy of 62.3% is achieved using an SVM on the segmented color channel model [13]. Artificial Neural Networks are used to classify the sign which gives average accuracy of 94% and SVM gives accuracy of 92% [18]. 4. CONCLUSION: Normally, for sign language translation, various projects have used CNN model, some of them also tried with Linear discriminant analysis (LDA) and achieved the output[5]. Here we have proposed a LSTM framework for sign language translation which works on long short-term memory concept. This model removes the unwanted features and remembers features which are important and updates features for further recognition. Thus, building a comprehensive sign language recognizer through LSTM instead of CNN, for phrases and alphabet detection, data has been gathered for processing using web cameras. Further various data augmentation techniques could be used to get the model working under numerous situations and achieving higher accuracy. REFERENCES: 1. SsShivashankara&Dr.S.Srinath. (2018).” American Sign Language Recognition System: An Optimal Approach”. International Journal of Image, Graphics and Signal Processing. 10. 10.5815/ijigsp.2018.08.03. 2. Trigueiros Paulo, Ribeiro Fernando, Reis Luís. (2014). Vision-Based Portuguese Sign Language Recognition System. Advances in Intelligent Systems and Computing. 275. 10.1007/978-3- 319-05951-8_57. 3. Rajan, Rajesh & Leo, Judith. (2019). “A comprehensive analysis on sign language recognition system”. 4. KingeAnuj, Kulkarni Nilima, Devchakke Aditya, Dawda Aditya, Mukhopadhyay Ankit. (2022).” Intelligent Hand Cricket”. 10.1007/978-981-16- 4284-5_33. 5. Mahesh Kumar N B. “Conversion of Sign Language into Text”. International Journal of Applied Engineering Research ISSN 0973-4562 Volume 13, Number 9 (2018) pp. 7154-7161.
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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 1030 6. Dan Guo, Wengang Zhou, Houqiang Li, Meng Wang. "Hierarchical LSTM for Sign Language Translation”. The Thirty-Second AAAI Conference on Artificial Intelligence (AAAI-18), Vol. 32 No. 1 (2018) 7. MehreenHurroo , Mohammad Elham, 2020,” Sign Language Recognition System using Convolutional Neural Network and Computer Vision”. INTERNATIONAL JOURNAL OF ENGINEERING RESEARCH & TECHNOLOGY (IJERT) Volume 09, Issue 12 (December 2020). 8. Hao Zhou, Wengang Zhou, Weizhen Qi, Junfu Pu, HouqiangLi:Improving Sign Language Translation with Monolingual Data by Sign Back-Translation. CoRR abs/2105.12397 (2021) 9. S. He, "Research of a Sign Language Translation System Based on Deep Learning," 2019 International Conference on Artificial Intelligence and Advanced Manufacturing (AIAM), 2019, pp. 392-396, doi: 10.1109/AIAM48774.2019.00083. 10. D. M. M. T. AnkurVerma, Gaurav Dubey, “Sign Language Translator”, IJAST, vol. 29, no. 5s, pp. 246 - 253, Mar. 2020. 11. C. Zhang, Y. Tian and M. Huenerfauth, "Multi- modality American Sign Language recognition," 2016 IEEE International Conference on Image Processing (ICIP), 2016, pp. 2881-2885, doi: 10.1109/ICIP.2016.7532886. 12. S. Dinesh,S. Sivaprakash, Real-Time American Sign Language Recognition with Faster Regional Convolutional Neural Networks, international Journal of Innovative Research in Science, Engineering and Technology, March 2018 13. Sharma, R., Nemani, Y., Kumar, S., Kane, L., & Khanna, P. Recognition of Single-Handed Sign Language Gestures using Contour Tracing Descriptor. 14. Suk, H. I., Sin, B. K., & Lee, S. W. (2010). Hand gesture recognition based on dynamic Bayesian network framework. Pattern Recognition, 43(9), 3059-3072. https://doi.org/10.1016/j.patcog.2010.03.016 15. Sahoo, Ashok & Mishra, Gouri&RavulaKollu, Kiran. (2014). Sign language recognition: State of the art. ARPN Journal of Engineering and Applied Sciences. 9. 116-134. 16. “Sign Language Translation Using Deep Convolutional Neural Networks,” KSII Transactions on Internet and Information Systems, vol. 14, no. 2. Korean Society for Internet Information (KSII), 29-Feb-2020. 17. L. Pigou, S. Dieleman, P.-J. Kinderman's, and B. Schrauwen, “Sign language recognition using convolutional neural networks,” in Lecture Notes in Computer Science, Zürich, Switzerland, 2015, pp. 572–578. 18. Rokade, Yogeshwar&Jadav, Prashant. (2017). Indian Sign Language Recognition System. International Journal of Engineering and Technology. 9. 189-196. 10.21817/ijet/2017/v9i3/170903S030. 19. Shirbhate, Radha S., Mr. Vedant D. Shinde, Ms. Sanam A. Metkari, Ms. Pooja U. Borkar and Ms. Mayuri A. Khandge. “Sign language Recognition Using Machine Learning Algorithm.” Volume: 07 Issue: 03 Mar 2020 20. 1Shruty M. Tomar, 2Dr. Narendra M. Patel, 3Dr. Darshak G. Thakore.A Survey on Sign Language Recognition Systems.IJCRT, Volume 9, Issue 3 March 2021. 21. Jebali, Maher &Dalle, Patrice &Jemni, Mohamed. (2014). Sign Language Recognition System Based on Prediction in Human-Computer Interaction. Communications in Computer and Information Science. 435. 565-570. 10.1007/978-3-319- 07854-0_98. BIOGRAPHIES: Aditya Dawda is from Thane city, Maharashtra, India. He is currently pursuing a B.Tech In Computer Science from MIT-ADT University, School of Engineering. He is one of the authors of the paper 'Intelligent Hand Cricket' that won the Best Paper Award at CIIR 2021(a Springer conference). He developed projects like Intelligent Hand Cricket, Energy Demand Series, Sign Language Translation. He is interested in MERN stack development and Artificial Intelligence.
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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 1031 Aditya Devchakke is from Pune City, Maharashtra, India. He is currently pursuing B.Tech from MIT-ADT University, School of Engineering, Pune, India. He has won the Best Paper Award at the Springer conference(CIIR 21). He has worked on projects such as Energy price prediction, mask detection, hand cricket game. He is interested in WebDevelopment, Data Analysis, Machine Learning and Deep Learning. Avdhoot Durgude is from Pune City, Maharashtra, India. He is currently pursuing B.Tech from MIT-ADT University, School of Engineering, Pune, India. He has worked on projects such as Driver drowsiness detection system, Image segmentation. He is interested in Data Analysis, Machine Learning and Deep Learning.
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