Dr. Choi Ka Cheng is currently the Assistant Programme Coordinator and Lecturer for the Bachelor of Science in Computing Programme at the Macao Polytechnic University. She obtained her PhD in Software Engineering from the University of Macau and has been engaged in higher education for several years. Her main research areas include information hiding, digital watermarking, multimedia signal processing, genetic algorithms, and tourist itinerary planning.
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Current Employer/Organization
Macao Polytechnic University - Faculty of Applied Sciences -
Current Position
Lecturer (Assistant Programme Coordinator)Macao Polytechnic University
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Subjects Taught
- COMP1101 Information Technology
- COMP221 Object Oriented Technologies
- COMP311 Multimedia Application Development
- COMP421 Artificial Intelligence
- COMP490 Final Year Project
- COMP6299 Dissertation
- COMP6298 Project Report
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Education
Ph.D., Software Engineering, University of Macau (Macau)
M.Sc., E-Commerce Technology, University of Macau (Macau)
B.Sc., Software Engineering, University of Macau (Macau)
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Research Interests
- Information Hiding
- Digital Watermarking
- Multimedia Signal Processing
- Genetic Algorithm
- Tourist Itinerary Planning
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Work Experience
Feb 2017 – Present: Lecturer, Faculty of Applied Sciences, Macao Polytechnic University
Sep 2016 – Jan 2017: Senior Lecturer, Faculty of Humanities and Social Sciences, City University of Macao -
Additional Experience
Research Project
- Funding Institution: The Science and Technology Development Fund
- Project Number: 0082/2018/A2
- Project Name: Smart Tourism Platform for Macao and Portuguese-speaking Countries with Voice Recognition
- Project Role: Project Manager
Patents
- Chi-Man Pun, Ka-Cheng Choi and C. L. Philip Chen, "Reversible Audio Data Hiding," US Patent, Granted, US9396733, July 19, 2016.
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Publications
Journal Articles
Cheng-Hin Un and Ka-Cheng Choi, “Deep Watermarking based on Swin Transformer for Deep Model Protection,” Applied Sciences, vol. 15, no. (10), pp. 5250, 2025. https://doi.org/10.3390/app15105250 [SCI, JCR Q1]
Ka-Cheng Choi, Sha Li, Chan-Tong Lam, Angus Wong, Philip Lei, Benjamin Ng and Ka-Meng Siu, "Genetic Algorithm for Tourism Route Planning Considering Time Constrains," International Journal of Engineering Trends and Technology, vol. 70, no. (1), pp. 171–179, 2022. [Scopus]
Ka-Cheng Choi and Chi-Man Pun, "Robust Lossless Digital Watermarking Using Integer Transform with Bit Plane Manipulation," Multimedia Tools and Applications, vol. 75, no. (11), pp. 6621–6645, 2016. [SCI & EI]
Ka-Cheng Choi, Chi-Man Pun and C. L. Philip Chen, "Application of a Generalized Difference Expansion Based Reversible Audio Data Hiding Algorithm," Multimedia Tools and Applications, vol. 74, no. (6), pp. 1961-1982, 2015. [SCI & EI]
Chi-Man Pun and Ka-Cheng Choi, "Generalized Integer Transform Based Reversible Watermarking Algorithm Using Efficient Location Map Encoding and Adaptive Thresholding," Computing, vol. 96, no. (10), pp. 951-973, 2014. [SCI & EI]
Conference Articles
Pui I Lo and Ka-Cheng Choi, "AI based Social Media Privacy Issues Handler," in Proceedings of the International Conference on Computer Engineering and Application (ICCEA 2025), Hangzhou, 2025. [EI]
Lap Tou Chau and Ka-Cheng Choi, “AI Personalized Language Learning Application,” in Proceedings of the International Conference on Computer Engineering and Application (ICCEA '25), Hangzhou, 2025. [EI]
Chi Hou Lam and Ka-Cheng Choi, “Template-Adaptive Content Organization: AI-Driven Personalization for Ecommerce Email Marketing,” in Proceedings of the International Conference on Computer Engineering and Application (ICCEA '25), Hangzhou, 2025. [EI]
Soi Hou Tam and Ka-Cheng Choi, "Indoor Item Finding based on RSSI and RFID Tags," in Proceedings of the International Conference on Computing, Networks and Internet of Things (CNIOT 2024), Tokyo, 2024. [EI]
Yijia Dai and Ka-Cheng Choi, "Reversible Data Hiding in Encrypted Images Combined with Chaotic System Based on Pixel Prediction and Bit Plane Compression," in Proceedings of the International Conference on Digital Image Processing (ICDIP 2023), Nanjing, 2023. [EI]
Zhuojun Yu and Ka-Cheng Choi, "Augmenting RetinaFace Model with Conditional Generative Adversarial Networks for Hair Segmentation," in Proceedings of the International Conference on Artificial Intelligence and Big Data (ICAIBD 2023), Chengdu, 2023. [EI]
Yapeng Wang, Chan-Tong Lam, Ka-Cheng Choi, Benjamin Ng, Siu Ka Meng, Philip Lei and Xu Yang, "An Open Tourism Mobile Platform with Personalized Route Planning and Voice Recognition," in Proceedings of the International Conference on Information Technology: IoT and Smart City (ICIT 2021), Guangzhou, 2021. [EI]
Angus Wong, Alan Yeung, Ka-Cheng Choi and Philip Lei, "Exact Transient Analysis on LRU Cache Startup for Internet of Things," in Proceedings of the International Conference on Information Technology: IoT and Smart City (ICIT 2021), Guangzhou, 2021. [EI]
Yapeng Wang, Ruize Jia, Chan Tong Lam, Ka Cheng Choi, Koon Kei Ng, Xu Yang and Sio Kei Im, "Automatic Speech Recognition for Portuguese with Small Data Set," in Proceedings of the International Conference on Computer and Information Science (ICIS 2021-fall), Xi’an, 2021. [EI]
Ka-Cheng Choi and Chi-Man Pun, "Adaptive Image Encryption for High Capacity Reversible Data Hiding," in Proceedings of the International Conference on Dependable and Secure Computing, 2017, IEEE International Conference on, 7-8 Aug. 2017, Taipei, pp. 429-432. [Scopus]
Ka-Cheng Choi and Chi-Man Pun, "Difference Expansion Based Robust Reversible Watermarking with Region Filtering", in Proceedings of International Conference on Computer Graphics, Imaging and Visualization (CGiV 2016), Beni Mellal city, 2016. [Scopus]
Ka-Cheng Choi and Chi-Man Pun, "High Capacity Digital Audio Reversible Watermarking," in Proceedings of the International Conference on Computational Intelligence and Cybernetics (CYBERNETICSCOM), 2013, IEEE International Conference on, 3-4 Dec. 2013, Yogyakarta, pp.72-75. [Scopus]
Ka-Cheng Choi and Chi-Man Pun, "Adaptive Thresholding of an Efficient Generalized Integer Transform Based Reversible Watermarking," in Proceedings of the Second International Conference on Computer, Networks, Systems, and Industrial Applications (CNSI 2012), Jeju, 2012.
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Journal papers
Cheng-Hin Un and Ka-Cheng Choi, “Deep Watermarking based on Swin Transformer for Deep Model Protection,” Applied Sciences, vol. 15, no. (10), pp. 5250, 2025. https://doi.org/10.3390/app15105250 [SCI, JCR Q1]
Ka-Cheng Choi, Sha Li, Chan-Tong Lam, Angus Wong, Philip Lei, Benjamin Ng and Ka-Meng Siu, "Genetic Algorithm for Tourism Route Planning Considering Time Constrains," International Journal of Engineering Trends and Technology, vol. 70, no. (1), pp. 171–179, 2022. [Scopus]
Ka-Cheng Choi and Chi-Man Pun, "Robust Lossless Digital Watermarking Using Integer Transform with Bit Plane Manipulation," Multimedia Tools and Applications, vol. 75, no. (11), pp. 6621–6645, 2016. [SCI & EI]
Ka-Cheng Choi, Chi-Man Pun and C. L. Philip Chen, "Application of a Generalized Difference Expansion Based Reversible Audio Data Hiding Algorithm," Multimedia Tools and Applications, vol. 74, no. (6), pp. 1961-1982, 2015. [SCI & EI]
Chi-Man Pun and Ka-Cheng Choi, "Generalized Integer Transform Based Reversible Watermarking Algorithm Using Efficient Location Map Encoding and Adaptive Thresholding," Computing, vol. 96, no. (10), pp. 951-973, 2014. [SCI & EI]
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Conference Papers
Pui I Lo and Ka-Cheng Choi, "AI based Social Media Privacy Issues Handler," in Proceedings of the International Conference on Computer Engineering and Application (ICCEA 2025), Hangzhou, 2025. [EI]
Lap Tou Chau and Ka-Cheng Choi, “AI Personalized Language Learning Application,” in Proceedings of the International Conference on Computer Engineering and Application (ICCEA '25), Hangzhou, 2025. [EI]
Chi Hou Lam and Ka-Cheng Choi, “Template-Adaptive Content Organization: AI-Driven Personalization for Ecommerce Email Marketing,” in Proceedings of the International Conference on Computer Engineering and Application (ICCEA '25), Hangzhou, 2025. [EI]
Soi Hou Tam and Ka-Cheng Choi, "Indoor Item Finding based on RSSI and RFID Tags," in Proceedings of the International Conference on Computing, Networks and Internet of Things (CNIOT 2024), Tokyo, 2024. [EI]
Yijia Dai and Ka-Cheng Choi, "Reversible Data Hiding in Encrypted Images Combined with Chaotic System Based on Pixel Prediction and Bit Plane Compression," in Proceedings of the International Conference on Digital Image Processing (ICDIP 2023), Nanjing, 2023. [EI]
Zhuojun Yu and Ka-Cheng Choi, "Augmenting RetinaFace Model with Conditional Generative Adversarial Networks for Hair Segmentation," in Proceedings of the International Conference on Artificial Intelligence and Big Data (ICAIBD 2023), Chengdu, 2023. [EI]
Yapeng Wang, Chan-Tong Lam, Ka-Cheng Choi, Benjamin Ng, Siu Ka Meng, Philip Lei and Xu Yang, "An Open Tourism Mobile Platform with Personalized Route Planning and Voice Recognition," in Proceedings of the International Conference on Information Technology: IoT and Smart City (ICIT 2021), Guangzhou, 2021. [EI]
Angus Wong, Alan Yeung, Ka-Cheng Choi and Philip Lei, "Exact Transient Analysis on LRU Cache Startup for Internet of Things," in Proceedings of the International Conference on Information Technology: IoT and Smart City (ICIT 2021), Guangzhou, 2021. [EI]
Yapeng Wang, Ruize Jia, Chan Tong Lam, Ka Cheng Choi, Koon Kei Ng, Xu Yang and Sio Kei Im, "Automatic Speech Recognition for Portuguese with Small Data Set," in Proceedings of the International Conference on Computer and Information Science (ICIS 2021-fall), Xi’an, 2021. [EI]
Ka-Cheng Choi and Chi-Man Pun, "Adaptive Image Encryption for High Capacity Reversible Data Hiding," in Proceedings of the International Conference on Dependable and Secure Computing, 2017, IEEE International Conference on, 7-8 Aug. 2017, Taipei, pp. 429-432. [Scopus]
Ka-Cheng Choi and Chi-Man Pun, "Difference Expansion Based Robust Reversible Watermarking with Region Filtering", in Proceedings of International Conference on Computer Graphics, Imaging and Visualization (CGiV 2016), Beni Mellal city, 2016. [Scopus]
Ka-Cheng Choi and Chi-Man Pun, "High Capacity Digital Audio Reversible Watermarking," in Proceedings of the International Conference on Computational Intelligence and Cybernetics (CYBERNETICSCOM), 2013, IEEE International Conference on, 3-4 Dec. 2013, Yogyakarta, pp.72-75. [Scopus]
Ka-Cheng Choi and Chi-Man Pun, "Adaptive Thresholding of an Efficient Generalized Integer Transform Based Reversible Watermarking," in Proceedings of the Second International Conference on Computer, Networks, Systems, and Industrial Applications (CNSI 2012), Jeju, 2012.
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Professional Membership:
2022 – Present Associate Member, The Institute of Electrical and Electronics Engineers, Incorporated
2021 – Present Member, Macao Computer Society
2018 – Present IET Associate, The Institution of Engineering and Technology