{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T02:44:15Z","timestamp":1769741055406,"version":"3.49.0"},"reference-count":36,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2021,3,5]],"date-time":"2021-03-05T00:00:00Z","timestamp":1614902400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Key R&amp;D Program of China","award":["2019YFB2204800"],"award-info":[{"award-number":["2019YFB2204800"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper proposes a novel 3D discrete cosine transform (DCT) based image compression method for medical endoscopic applications. Due to the high correlation among color components of wireless capsule endoscopy (WCE) images, the original 2D Bayer data pattern is reconstructed into a new 3D data pattern, and 3D DCT is adopted to compress the 3D data for high compression ratio and high quality. For the low computational complexity of 3D-DCT, an optimized 4-point DCT butterfly structure without multiplication operation is proposed. Due to the unique characteristics of the 3D data pattern, the quantization and zigzag scan are ameliorated. To further improve the visual quality of decompressed images, a frequency-domain filter is proposed to eliminate the blocking artifacts adaptively. Experiments show that our method attains an average compression ratio (CR) of 22.94:1 with the peak signal to noise ratio (PSNR) of 40.73 dB, which outperforms state-of-the-art methods.<\/jats:p>","DOI":"10.3390\/s21051817","type":"journal-article","created":{"date-parts":[[2021,3,5]],"date-time":"2021-03-05T11:46:09Z","timestamp":1614944769000},"page":"1817","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["3D DCT Based Image Compression Method for the Medical Endoscopic Application"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0934-8604","authenticated-orcid":false,"given":"Jiawen","family":"Xue","sequence":"first","affiliation":[{"name":"Institute of Microelectronics, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Li","family":"Yin","sequence":"additional","affiliation":[{"name":"Institute of Microelectronics, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zehua","family":"Lan","sequence":"additional","affiliation":[{"name":"Institute of Microelectronics, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mingzhu","family":"Long","sequence":"additional","affiliation":[{"name":"Institute of Microelectronics, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guolin","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Electronic Engineering, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhihua","family":"Wang","sequence":"additional","affiliation":[{"name":"Institute of Microelectronics, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiang","family":"Xie","sequence":"additional","affiliation":[{"name":"Institute of Microelectronics, Tsinghua University, Beijing 100084, China"},{"name":"The Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Iddan, G., Meron, G., Glukhovsly, A., and Swain, P. (2000). Wireless capsule endoscopy. Nature, 405.","DOI":"10.1038\/35013140"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"590","DOI":"10.1109\/TBCAS.2014.2359012","article-title":"Design of endoscopic capsule with multiple cameras","volume":"9","author":"Gu","year":"2014","journal-title":"IEEE Trans. Biomed. Circuits Syst."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1109\/RBME.2017.2757013","article-title":"Are current advances of compression algorithms for capsule endoscopy enough? A technical review","volume":"10","author":"Alam","year":"2017","journal-title":"IEEE Rev. Biomed. Eng."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"2390","DOI":"10.1109\/JSSC.2006.882884","article-title":"A Low-Power Digital IC Design Inside the Wireless Endoscopic Capsule","volume":"41","author":"Xie","year":"2006","journal-title":"IEEE J. SolidState Circuits"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Chen, X., Zhang, X., Zhang, L., Qi, N., Jiang, H., and Wang, Z. (2008, January 3\u20135). A wireless capsule endoscopic system with a low-power controlling and processing ASIC. Proceedings of the IEEE Asian Solid-State Circuits Conference, Fukouka, Japan.","DOI":"10.1109\/ASSCC.2008.4708792"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"10235","DOI":"10.1109\/ACCESS.2016.2638475","article-title":"VLSI implementation of a cost-efficient near-lossless CFA image compressor for wireless capsule endoscopy","volume":"4","author":"Chen","year":"2016","journal-title":"IEEE Access"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1016\/j.bspc.2018.10.016","article-title":"Low complexity image compression algorithm based on hybrid DPCM for wireless capsule endoscopy","volume":"48","author":"Malathkar","year":"2019","journal-title":"Biomed. Signal Process. Control"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1016\/j.sna.2014.10.033","article-title":"Physical Design of a smart-device and FPGA based wireless capsule endoscopic system","volume":"221","author":"Khan","year":"2015","journal-title":"Sens. Actuators A Phys."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"13823","DOI":"10.1109\/ACCESS.2017.2726997","article-title":"Lossless Compression in Bayer Color Filter Array for Capsule Endoscopy","volume":"5","author":"Mohammed","year":"2017","journal-title":"IEEE Access"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"20779","DOI":"10.3390\/s141120779","article-title":"Design of a Lossless Image Compression System for Video Capsule Endoscopy and Its Performance in In-Vivo Trials","volume":"14","author":"Khan","year":"2014","journal-title":"Sensors"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1534","DOI":"10.1109\/TCSVT.2011.2163985","article-title":"Low power and low complexity compressor for video capsule endoscopy","volume":"21","author":"Khan","year":"2011","journal-title":"IEEE Trans. Circuits Syst. Video Technol."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"2717","DOI":"10.1109\/JSSC.2013.2274894","article-title":"An asymmetrical qpsk\/ook transceiver soc and 15:1 jpeg encoder ic for multifunction wireless capsule endoscopy","volume":"48","author":"Gao","year":"2013","journal-title":"IEEE J. Solid-State Circuits"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1425","DOI":"10.1007\/s11554-016-0653-4","article-title":"Energy-efficient image compression algorithm for high-frame rate multi-view wireless capsule endoscopy","volume":"16","author":"Turcza","year":"2019","journal-title":"J. Real-Time Image Process."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"552","DOI":"10.1016\/j.sna.2011.09.026","article-title":"Low power fpga-based image processing core for wireless capsule endoscopy","volume":"172","author":"Turcza","year":"2011","journal-title":"Sens. Actuators A Phys."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Mostafa, A., Khan, T., and Wahid, K. (2014, January 27\u201331). An improved YEF-DCT based compression algorithm for video capsule endoscopy. Proceedings of the 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Chicago, IL, USA.","DOI":"10.1109\/EMBC.2014.6944118"},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Gu, Y., Jiang, H., Xie, X., Li, G., and Wang, Z. (2016, January 17\u201319). An image compression algorithm for wireless endoscopy and its ASIC implementation. Proceedings of the 2016 IEEE Biomedical Circuits and Systems Conference (BioCAS), Shanghai, China.","DOI":"10.1109\/BioCAS.2016.7833735"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1588","DOI":"10.1049\/el.2012.3470","article-title":"Two-stage wireless capsule image compression with low complexity and high quality","volume":"48","author":"Gu","year":"2012","journal-title":"Electron. Lett."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1016\/j.jesit.2017.01.006","article-title":"Low power design of wireless endoscopy compression\/communication architecture","volume":"5","author":"Abdelkrim","year":"2018","journal-title":"J. Electr. Syst. Inf. Technol."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1016\/j.image.2017.03.003","article-title":"Low-power DCT-based compressor for wireless capsule endoscopy","volume":"59","author":"Shabani","year":"2017","journal-title":"Signal Process. Image Commun."},{"key":"ref_20","unstructured":"Bayer, B.E. (2021, March 05). Color Imaging Array. Available online: https:\/\/patentimages.storage.googleapis.com\/pdfs\/US3971065.pdf."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Tong, K., Gu, Y.K., Li, G.L., Xie, X., Liu, S.H., Zhao, K., and Wang, Z.H. (2012, January 16\u201318). A fast algorithm of 4-point floating DCT in image\/video compression. Proceedings of the 2012 International Conference on Audio, Language and Image, Shanghai, China.","DOI":"10.1109\/ICALIP.2012.6376736"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"5431","DOI":"10.1109\/TIP.2020.2982832","article-title":"Learned fast HEVC intra coding","volume":"29","author":"Chen","year":"2020","journal-title":"IEEE Trans. Image Process."},{"key":"ref_23","unstructured":"Costa, L.F., and Veiga, A.C.P. (2005, January 24\u201326). \u201cIdentification of the best quantization table using genetic algorithms,\u201d in PACRIM. Proceedings of the 2005 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, BC, Canada."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Jiang, M., Luo, Y., and Yang, S. (2007, January 1\u20135). Stagnation analysis in particle swarm optimization. Proceedings of the 2007 IEEE Swarm Intelligence Symposium, Honolulu, HI, USA.","DOI":"10.1109\/SIS.2007.368031"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1109\/4235.985692","article-title":"The particle swarm-explosion, stability, and convergence in a multidimensional complex space","volume":"6","author":"Clerc","year":"2002","journal-title":"IEEE Trans. Evolut. Comput."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"1234","DOI":"10.1109\/LCOMM.2011.092911.111661","article-title":"New approach in image compression: 3d spiral jpeg","volume":"15","author":"Engin","year":"2011","journal-title":"IEEE Commun. Lett."},{"key":"ref_27","unstructured":"Pennebaker, W.B., and Mitchell, J.L. (1992). JPEG: Still Image Data Compression Standard, Springer Science & Business Media."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"779","DOI":"10.1109\/TIP.2018.2871597","article-title":"Fast adaptive bilateral filtering","volume":"28","author":"Gavaskar","year":"2018","journal-title":"IEEE Trans. Image Process."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"74","DOI":"10.1109\/76.388056","article-title":"An optimization approach for removing blocking effects in transform coding","volume":"5","author":"Minami","year":"1995","journal-title":"IEEE Trans. Circuits Syst. Video Technol."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1649","DOI":"10.1109\/TCSVT.2012.2221191","article-title":"Overview of the high efficiency video coding (HEVC) standard","volume":"22","author":"Sullivan","year":"2012","journal-title":"IEEE Trans. Circuits Syst. Video Technol."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"877","DOI":"10.1109\/TCSVT.2002.804880","article-title":"Blocking artifact detection and reduction in compressed data","volume":"12","author":"Triantafyllidis","year":"2002","journal-title":"IEEE Trans. Circuits Syst. Video Technol."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"1437","DOI":"10.1109\/TCSVT.2010.2077474","article-title":"No-reference quality assessment of H. 264\/AVC encoded video","volume":"20","author":"Queluz","year":"2010","journal-title":"IEEE Trans. Circuits Syst. Video Technol."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"251","DOI":"10.1016\/j.jvcir.2010.12.007","article-title":"Image postprocessing by non-local Kuan\u2019s filter","volume":"22","author":"Zhang","year":"2011","journal-title":"J. Vis. Commun. Image Represent."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Zhang, R., Liu, Y., and Cham, W.-K. (2011, January 22\u201327). High performance deartifacting filters in video compression. Proceedings of the 2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Prague, Czech Republic.","DOI":"10.1109\/ICASSP.2011.5946592"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"838","DOI":"10.1109\/TIP.2003.814252","article-title":"Removing the blocking artifacts of block-based DCT compressed images","volume":"12","author":"Luo","year":"2003","journal-title":"IEEE Trans. Image Process."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"He, K., Sun, J., and Tang, X. (2010). Guided image filtering. European Conference on Computer Vision, Springer.","DOI":"10.1007\/978-3-642-15549-9_1"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/5\/1817\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:33:34Z","timestamp":1760160814000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/5\/1817"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,3,5]]},"references-count":36,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2021,3]]}},"alternative-id":["s21051817"],"URL":"https:\/\/doi.org\/10.3390\/s21051817","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,3,5]]}}}