Dr. Richard Hsung

Publication List

My publications appear in high impact international journals and conferences. The journal papers citations were up to 150 [3] (from google scholar) covering the following areas:

  1. Theory, design and applications of wavelet/multiwavelet.
  2. Enabling techniques for fast 3D surface reconstruction.
  3. Theory and applications of the Discrete Periodic Radon Transform.
  4. Signal/image processing and biomedical applications including speech enhancement, tomography;
  5. Digital dentistry.
  6. Artificial Intelligence.

 

FULL LIST JOURNAL PUBLICATIONS
(Impact factor and citation count may not be the most updated)
A. Wavelet / Multiwavelet: Theory, design and applications (Image/Audio)

  1. Tai-Chiu Hsung, Daniel Pak-Kong Lun, and Wan-Chi Siu, “A Deblocking Technique for Block-Transform Compressed Image using Wavelet Transform Modulus Maxima,” IEEE Transactions on Image Processing, vol. 7, no. 10, pp.1488-1496, Oct. 1998. (Impact factor: 11.04, citation: 83)
  2. Tai-Chiu Hsung and Daniel Pak-Kong Lun, “Application of singularity detection for the deblocking of JPEG decoded images,” IEEE transactions on circuits and systems II (special issue on ISCAS), vol. 45, no. 5, pp.640-644, May 1998. (citation: 38)
  3. Tai-Chiu Hsung, Daniel Pak-Kong Lun and Wan-Chi Siu, “Denoising by singularity detection,” IEEE Transactions on Signal Processing, vol 47, no. 11, pp. 3139-3144, 1999. (citation: 149)
  4. Tai-Chiu Hsung and Daniel Pak-Kong Lun, “Boundary Filters Design for Multiwavelets,” IEE Proceedings – Vision, Image and Signal Processing, U.K., vol. 149, no. 4, pp.315-320, Oct. 2002.
  5. Tai-Chiu Hsung, Man-Cheong Sun, Daniel Pak-Kong Lun and Wan-Chi Siu, “Symmetric prefilters for multiwavelets,” IEE Proceedings – Vision, Image and Signal Processing, U.K, vol. 150, no. 1, Feb. 2003, pp.59-68. (Citation: 18)
  6. Tai-Chiu Hsung and Daniel Pak-Kong Lun, “Optimal Thresholds for Multiwavelet Shrinkage,” IEE Electronics Letters, U.K., vol. 39, no. 5, Mar. 6, 2003, pp.473-474. (citation: 6)
  7. Tai-Chiu Hsung and Daniel P.K. Lun, “Generalized Cross Validation for Multiwavelet Shrinkage,” IEEE Signal Processing Letters, vol. 11, no. 6, Jun. 2004, pp.549-552. (citation: 21)
  8. Tai-Chiu Hsung and Daniel P.K. Lun and Dominic K.C. Ho, “Optimizing the Multiwavelet Shrinkage Denoising,” IEEE Transactions on Signal Processing, vol. 53, no. 1, Jan. 2005, pp.240-251. (citation: 61)
  9. Tai-Chiu Hsung, Daniel Pak-Kong Lun and K.C. Ho, “Orthogonal symmetric prefilter banks for discrete multiwavelet transforms,” IEEE signal processing letters, vol. 13, no.3, Mar. 2006, pp.145-148. (citation: 17)
  10. Tai-Chiu Hsung, Daniel Pak-Kong Lun, Yu-Hing Shum and K.C. Ho, “Generalized Discrete Multiwavelet Transform With Embedded Orthogonal Symmetric Prefilter Bank,” IEEE Transactions on Signal Processing, vol. 55, no.12, Dec. 2007, pp.5619-5629. (citation: 11)

B. 3D reconstruction/Biomedical engineering

  1. Tai-Chiu Hsung, Daniel Pak-Kong Lun and William W.L. Ng, “Efficient fringe image enhancement based on dual-tree complex wavelet transform,” Applied Optics, vol. 50, issue 21, pp.3973-3986, 2011. http://dx.doi.org/10.1364/AO.50.003973 (citation: 23)
  2. Budianto, P. K. D. Lun, and Tai-Chiu Hsung, “Marker encoded fringe projection profilometry for efficient 3D model acquisition,” Applied Optics, vol. 53, issue 31, pp.7442-7453, 2014. http://dx.doi.org/10.1364/AO.53.007442 (citation: 33)

C. Biomedical engineering / Dentistry

  1. Tai-Chiu Hsung, John Lo, T.S. Li, L.K. Cheung, “Recording of natural head position using stereo-photogrammetry: A new technique and reliability study,” Journal of Oral and Maxillofacial Surgery, vol. 72, issue 11, pp.2256–2261, Nov. 2014. doi: 10.1016/j.joms.2014.03.025 (citation: 28)
  2. Cze-yin Lin, Tai-Chiu Hsung, Balvinder Khambay, “Reducing conebeam CT scan height as a method of radiation reduction for photorealistic three-dimensional orthognathic planning,” Journal of Cranio-Maxillofacial Surgery, Volume 43, Issue 6, July 2015, Pages 907-912, http://dx.doi.org/10.1016/j.jcms.2015.04.002. ISSN 1010-5182 (citation: 12)
  3. Tai-Chiu Hsung, John Lo, Tik-Shun Li and Lim-Kwong Cheung, “Automatic detection and reproduction of Natural Head Position in stereo-photogrammetry”, PLoS ONE 10(6): e0130877. June 30, 2015. doi: 10.1371/journal.pone.0130877 (citation: 21)
  4. Cheung, A. Almukhtar, A. Keeling, TC. Hsung, X. Ju, J. McDonald, A. Ayoub and B. Khambay, “The accuracy of conformation of a generic surface mesh for the analysis of facial soft tissue changes,” PLoS One 11(4): e0152381. April 19, 2016. doi:10.1371/journal.pone.0152381 (citation: 17).
  5. Walter Y.H. Lam, Richard T.C. Hsung, Winnie W.S. Choi, Henry W.K. Luk, Edmond H.N. Pow, “A 2-part facebow for CAD-CAM dentistry,” The Journal of Prosthetic Dentistry, December 2016, Volume 116, Issue 6, Pages 843–847, http://dx.doi.org/10.1016/j.prosdent.2016.05.013. (citation: 53)
  6. Zhu S, Keeling A, Hsung TC, Yang Y, Khambay B, “The difference between registered Natural Head Position and Estimated Natural Head Position in three dimensions,” International Journal of Oral and Maxillofacial Surgery. 2017, Volume 47, Issue 2, 2018, Pages 276-282. https://doi.org/10.1016/j.ijom.2017.07.016. (citation: 13)
  7. Tai-Chiu Hsung, John Lo, Mei-Man Chong, Tazuko K. Goto and Lim-Kwong Cheung, “Orbit Segmentation by Surface Reconstruction With Automatic Sliced Vertex Screening,” IEEE Transactions on Biomedical Engineering, vol. 65, no. 4, pp. 828-838, April 2018. doi: 10.1109/TBME.2017.2720184 (citation: 8)
  8. Walter Y.H. Lam, Richard T.C. Hsung, Winnie W.S. Choi, Henry W.K. Luk, Edmond H.N. Pow, “A clinical technique for virtual articulator mounting with natural head position using calibrated stereophotogrammetry,” The Journal of Prosthetic Dentistry. Volume 119, Issue 6, June 2018, Pages 902-908. https://doi.org/10.1016/j.prosdent.2017.07.026. (citation: 53)
  9. J. Lowney, T.C. Hsung, D.O. Morris and B.S. Khambay, “Quantitative dynamic analysis of the nasolabial complex using 3D motion capture: A normative data set,” Journal of Plastic, Reconstructive & Aesthetic Surgery, Volume 71, Issue 9, September 2018, Pages 1332-1345, doi: 10.1016/j.bjps.2018.05.001 (citation: 11)
  10. Walter Y.H. Lam, Richard T.C. Hsung, Leo Y.Y. Cheng, Edmond H.N. Pow, “Mapping intraoral photographs on virtual teeth model,” Journal of Dentistry, Volume 79, December 2018, Pages 107-110, https://doi.org/10.1016/j.jdent.2018.09.009. (citation: 12)
  11. Jing Li, Zhong Shen, Wen Yu Tian Xu, Walter Yu Hang Lam, Richard Tai Chiu Hsung, Edmond Ho Nang Pow, Kazuhiro Kosuge, Zheng Wang, “A Compact Dental Robotic System Using Soft Bracing Technique,” IEEE Robotics and Automation Letters, vol. 4, no. 2, pp. 1271-1278, April 2019. doi: 10.1109/LRA.2019.2894864 (citation: 26)
  12. S. Khambay, C.J. Lowney, T.-C. Hsung, D.O. Morris, “Fluctuating asymmetry of dynamic smiles in normal individuals,” International Journal of Oral and Maxillofacial Surgery, October 2019, Volume 48, Issue 10, Pages 1372–1379. DOI: https://doi.org/10.1016/j.ijom.2019.01.032
  13. Yang Zheng, Hong Fu, Ruimin Li, Tai-Chiu Hsung, Zongxi Song, Desheng Wen, “Deep neural network oriented evolutionary parametric eye modeling,” Pattern Recognition, May 2021, 107755, https://doi.org/10.1016/j.patcog.2020.107755.
  14. F. Hung, L.L. Hui, A.W.K. Yeung, Y.Q. Wu, T.C. Hsung, M.M. Bornstein, “A volumetric analysis of mucous retention cysts in the maxillary sinus: a retrospective study using cone beam computed tomography (CBCT),” Imaging Science in Dentistry, v.51, pp. e16, 2021.
  15. Zhiyi Shan, Richard Tai-Chiu Hsung, Congyi Zhang, Juanjuan Ji, Wing Shan Choi, Wenping Wang, Yanqi Yang, Min Gu and Balvinder S. Khambay, “Anthropometric accuracy of three-dimensional average faces compared to conventional facial measurements,” Science Report, 11, 12254 (2021). https://doi.org/10.1038/s41598-021-91579-4
  16. Kang-Gao Pang, Tai-Chiu Hsung, Guozhao Liao,Wing-Kuen Ling, Alex Ka-Wing Law and Winnie W.S. Choi, “Obstructive Sleep apnea Detection using Speech signals with High Frequency Components,” Journal of Communications, vol. 17, no. 1, pp. 49-55, January 2022. Doi: 10.12720/jcm.17.1.49-55.
  17. Tai-Chiu Hsung, Andy W.K. Yeung, W.S. Choi, Henry W.K. Luk, Leo Y.Y. Cheng and Walter Y.H. Lam, “Recording Natural Head Position Using Cone Beam Computerized Tomography,” Sensors, vol. 21, no. 24, p. 8189, Dec. 2021. https://doi.org/10.3390/s21248189
  18. Yu Pan, Caiyun Heng, Zhi-Jie Wu, Juliana Tam, Richard TC Hsung, Edmond HN Pow, Walter YH Lam, “Comparison of the virtual techniques in registering single implant position with a universal-coordinate system: An in vitro study,” Journal of Dentistry, Volume 117, 2022, 103925. https://doi.org/10.1016/j.jdent.2021.103925
  19. Deepal Haresh Ajmera, Richard Tai-Chiu Hsung, Pradeep Singh, Natalie Sui Miu Wong, Andy Wai Kan Yeung, Walter Yu Hang Lam, Balvinder S. Khambay, Yiu Yan Leung, Min Gu, “Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes,” Clinical Oral Investigations, Springer, vol 26, pp.4947–4966 (2022) DOI: https://doi.org/10.1007/s00784-022-04463-4
  20. Reinhard Chun Wang Chau, Ming Chong, Khaing Myat Thu, Nate Sing Po Chu, Mohamad Koohi-Moghadam, Richard Tai-Chiu Hsung, Colman McGrath, Walter Yu Hang Lam, “Artificial intelligence-designed single molar dental prostheses: a protocol of prospective experimental study,” PLoS ONE 17(6): e0268535. Published: June 2, 2022, https://doi.org/10.1371/journal.pone.0268535.
  21. Min GU, Deepal Haresh Ajmera, Congyi Zhang, Janson Hoi Hei Ng, Richard Tai-Chiu Hsung, Pradeep Singh, Wenping Wang, Yiu Yan Leung, Balvinder S. Khambay, “Three-dimensional assessment of facial asymmetry in Class III subjects, Part 2: comparing asymmetry index and asymmetry scores,” Clinical Oral Investigation, 2023 Oct, 27(10):5813-5826. https://doi.org/10.1007/s00784-023-05193-x
  22. Denise Yung, Andy KL Tse, Richard TC Hsung, Michael G Botelho, Edmond HN Pow, Walter YH Lam, “Comparison of the colour accuracy of a single-lens reflex camera and a smartphone camera in a clinical context,” Journal of Dentistry, volume 137, Oct. 2023, 104681. https://doi.org/10.1016/j.jdent.2023.104681
  23. Pradeep Singh, Richard Tai-Chiu Hsung, Deepal Haresh Ajmera, Yiu Yan Leung, Colman McGrath, Min Gu, “Can smartphones be used for routine dental clinical application? A validation study for using smartphone-generated 3D facial images,” Journal of Dentistry, volume 139, Dec. 2023, 104775, https://doi.org/10.1016/j.jdent.2023.104775.
  24. Singh, Pradeep, Michael M. Bornstein, Richard Tai-Chiu Hsung, Deepal Haresh Ajmera, Yiu Yan Leung, and Min Gu. 2024. “Frontiers in Three-Dimensional Surface Imaging Systems for 3D Face Acquisition in Craniofacial Research and Practice: An Updated Literature Review” Diagnostics 14, no. 4: 423, 2024. https://doi.org/10.3390/diagnostics14040423
  25. Singh, P., Hsung, R. T. C., Ajmera, D. H., Said, N. A., Leung, Y. Y., McGrath, C., & Gu, M., “Smartphone-generated 3D facial images: reliable for routine assessment of the oronasal region of patients with cleft or mere convenience? A validation study,” BMC Oral Health, 2024, 24(1), 1517.
  26. Pradeep Singh, Huijun Han, Heng Zhang, Richard Tai-Chiu Hsung, Yifan Lin, Deepal Haresh Ajmera, Yiu Yan Leung, Lifeng Zhu, Congyi Zhang, Min Gu, “Determining post-orthognathic surgery profile: A validation study on the potential of modified chin point as a reliable predictor,” PLOS One, (accepted July 18, 2025).

 D. Discrete Periodic Radon Transform

  1. Tai-Chiu Hsung, Daniel Pak-Kong Lun, and Wan-Chi Siu, “The Discrete Periodic Radon Transform,” IEEE Transactions on Signal Processing, vol. 44, no. 10, pp.2651-2657, 1996. (citation: 70)
  2. Daniel P.K. Lun, Tai-Chiu Hsung and T.W. Shen, “Orthogonal Discrete Periodic Radon Transform Part I: Theory and Realization,” Signal Processing (EURASIP), Elsevier Science, Amsterdam, vol. 83, no. 5, pp.941-955, May 2003. (citation: 35)
  3. Daniel P.K. Lun, Tai-Chiu Hsung and T.W. Shen, “Orthogonal Discrete Periodic Radon Transform Part II: Applications,” Signal Processing (EURASIP), Elsevier Science, Amsterdam, vol. 83, no. 5, pp.957-971, May 2003. (citation: 25)
  4. Daniel P.K. Lun, Tommy C.L. Chan, Tai-Chiu Hsung, David D. Feng and Y.H. Chan, “Efficient Blind Image Restoration using Discrete Periodic Radon Transform,” IEEE Transactions on Image Processing. vol. 13, no.2, pp.188-200, Feb. 2004. (citation: 24)
  5. Tai-Chiu Hsung, Daniel Pak-Kong Lun, and Wan-Chi Siu, “Reply to “Comments on ‘The Discrete Periodic Radon Transform'”,” IEEE Transactions on Signal Processing, vol. 58, no.11, pp.5963-5964, 2010. (citation: 5)

E. Tomography, Speech enhancement

  1. Tai-Chiu Hsung and Daniel Pak-Kong Lun, “A new sampling scheme for the region-of-interest tomography,” IEEE Transactions on Signal Processing, vol. 48, no. 4, pp.1154-1163, 2000. (citation: 8)
  2. Tommy C.L. Chan, Tai-Chiu Hsung and Daniel P.K. Lun, “Improved MPEG-4 Still Texture Image Coding Under Noisy Environment,” IEEE Transactions on Image Processing, vol. 12, no. 5, pp.500-508, 2003. (citation: 9)
  3. K. Cheuk, T.C. Hsung, and Daniel P.K. Lun, “Design and Implementation of Contractual Based Real-time Scheduler for Multimedia Streaming Proxy Server,” Multimedia Tools and Applications, vol.28, pp.69-88, 2006. (citation: 3)
  4. Daniel Pak-Kong Lun, Tak-Wai Shen, Tai-Chiu Hsung, Dominic K.C. Ho, “Wavelet based speech presence probability estimator for speech enhancement,” Digital Signal Processing, Elsevier, vol.22, issue 6, pp.1161–1173, Dec. 2012. http://dx.doi.org/10.1016/j.dsp.2012.06.011. (citation: 18)

F. Artificial Intelligence applications

  1. Reinhard Chun Wang Chau, Richard Tai-Chiu Hsung, Colman McGrath, Edmond Ho Nang Pow, and Walter Yu-Hang Lam, “Accuracy of Artificial Intelligence-designed Single-molar Dental Prostheses: A Feasibility Study,” The Journal of Prosthetic Dentistry, 2023 Jan 9:S0022-3913(22) 00764-8.
    doi:10.1016/j.prosdent.2022.12.004. (accepted on Dec 07, 2022, available online:
    https://www.sciencedirect.com/science/article/pii/S0022391322007648).
  2. Wai Lun Lo, Henry Shu Hung Chung, Richard Tai Chiu Hsung, Hong Fu and Tak Wai Shen, “PV Panel Model Parameter Estimation by Using Neural Network,” Sensors, 2023, 23(7), 3657; https://doi.org/10.3390/s23073657 – 31 Mar 2023.
  3. Reinhard Chun Wang Chau, Khaing Myat Thu, Richard Tai Chiu Hsung and Walter Yu Hang Lam, “Teeth Reconstruction Using Artificial Intelligence: Trends, Perspectives, and Prospects, ” Journal of the California Dental Association, vol 51, issue 1, Article: 2199910, (Published online: 18 Apr 2023) DOI: 10.1080/19424396.2023.2199910
  4. Reinhard Chun Wang Chau, Guan-Hua Li, In Meei Tew, Khaing Myat Thu, Colman McGrath, Wai-Lun Lo, Wing-Kuen Ling, Richard Tai-Chiu Hsung, Walter Yu Hang Lam, “Accuracy of Artificial Intelligence-based Photographic Detection of Gingivitis,” International Dental Journal, Volume 73, Issue 5, October 2023, Pages 724-730, https://doi.org/10.1016/j.identj.2023.03.007
  5. Reinhard Chun Wang Chau, Khaing Myat Thu, Akhilanand Chaurasia, Richard Tai Chiu Hsung, and Walter Yu-Hang Lam, “A Systematic Review of the Use of mHealth in Oral Health Education among Older Adults,” Dentistry Journal, vol. 11, no. 8: 189, 2023 https://doi.org/10.3390/dj11080189
  6. Reinhard Chun Wang Chau, Khaing Myat Thu, Ollie Yiru Yu, Richard Tai-Chiu Hsung, Edward Chin Man Lo, Walter Yu Hang Lam, “Performance of Generative Artificial Intelligence in Dental Licensing Examinations,” International Dental Journal, 2024, Volume 74, Issue 3, June 2024, Pages 616-621. https://doi.org/10.1016/j.identj.2023.12.007.
  7. Reinhard Chun Wang Chau, Khaing Myat Thu, Richard Tai Chiu Hsung, Colman McGrath, Walter Yu Hang Lam, “Self-monitoring of Oral Health Using Smartphone Selfie Powered by Artificial Intelligence: Implications for Preventive Dentistry,” Oral Health and Preventive Dentistry, 2024 Jul 23;22:5758200. DOI: 10.3290/j.ohpd.b5758200, PubMed-ID: 39308412
  8. Chau RCW, Thu KM, Yu OY, Lo ECM, Hsung RT, Lam WYH. Response to Generative AI in Dental Licensing Examinations: Comment. Int Dent J. 2024 Aug;74(4):897-898. doi: 10.1016/j.identj.2024.02.002. Epub 2024 Feb 25. PMID: 38403499; PMCID: PMC11287190.
  9. Ku JCK, Lam WYH, Li KY, Hsung RTC, Chu CH, Yu OY, “Accuracy of Detection Methods for Secondary Caries Around Direct Restorations: A Systematic Review and Meta-Analysis,”. Journal of Dentistry, Feb 2025, volume 153, 105541, https://doi.org/10.1016/j.jdent.2024.105541
  10. Chau RCW, Cheng ACC, Mao K, Khaing MT, Ling Z, Tew IM, Chang TH, Tan HJ, McGrath C, Lo WL, Hsung RTC, Lam WYH, “External Validation of an AI mHealth Tool for Gingivitis Detection among Older Adults at Daycare Centers: A Pilot Study,” International Dental Journal, Volume 75, Issue 3, June 2025, Pages 1970-1978. https://doi.org/10.1016/j.identj.2025.01.008
  11. Han, Huijun and Zhang, Congyi and Zhu, Lifeng and Singh, Pradeep and Hsung, Richard Tai-Chiu and Leung, Yiu Yan and Komura, Taku and Wang, Wenping and Gu, Min, “Facial Surgery Preview Based on the Orthognathic Treatment Prediction” (Available at SSRN: https://ssrn.com/abstract=5062569 or http://dx.doi.org/10.2139/ssrn.5062569 Computer Methods and Programs in Biomedicine (Available online 23 April 2025, 108781); Posted on SSRN: 2 Jan 2025)
  12. Wai-Lun Lo, Kwok-Wai Wong, Richard Tai-Chiu Hsung, Henry Shu-Hung Chung, and Hong Fu, “Meteorological Visibility Estimation Using Landmark Object Extraction and the ANN Method,” Sensors 25, no. 3: pp.951, Published: 5 February 2025. https://doi.org/10.3390/s25030951
  13. Huijun Han, Congyi Zhang, Lifeng Zhu, Pradeep Singh, Richard Tai-Chiu Hsung, Yiu Yan Leung, Taku Komura, Wenping Wang, Min Gu, “Facial surgery preview based on the orthognathic treatment prediction,” Computer Methods and Programs in Biomedicine, Volume 267, July 2025, 108781. https://doi.org/10.1016/j.cmpb.2025.108781
  14. Chau, R. C. W., Thu, K. M., Yu, O. Y., Hsung, R. T.-C., Wang, D. C. P., Man, M. W. H., Wang, J. J., & Lam, W. Y. H., “Evaluation of Chatbot Responses to Text-Based Multiple-Choice Questions in Prosthodontic and Restorative Dentistry,” Dentistry Journal, 13(7), 279. https://doi.org/10.3390/dj13070279
  15. Wai Lun Lo, Henry Shu Hung Chung, Richard Tai Chiu Hsung, Hong Fu, Tony Yulin Zhu, Tak Wai Shen and Harris Sik Ho Tsang, “Optimal Parameter Estimation for Solar PV Panel Based on ANN and Adaptive Particle Swarm Optimization,” Algorithms 2025, 18, 598. https://doi.org/10.3390/a18100598
  16. Zhicong Song, Harris Sik-Ho Tsang, Richard Tai-Chiu Hsung, Yulin Zhu and Wai-Lun Lo, “From Market Volatility to Predictive Insight: An Adaptive Transformer-RL Framework for Sentiment-Driven Financial Time Series Forecasting,” Forecasting, forecasting-3791370 (Accepted on 30 September 2025, preprint: https://www.preprints.org/manuscript/202507.1499/v1 ).
  17. Wai Lun Lo, Kwok Wai Wong, Richard Tai Chiu Hsung, Henry Shu Hung Chung, Hong Fu, Tony Yulin Zhu and Harris Sik Ho Tsang, “A Learnable Attention Framework for Meteorological Visibility Estimation,” (Submitted to IEEE Access), Sept 2025.
ADMISSION