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Conventional synthetic aperture radar (SAR) imaging algorithms only provide limited resolution in active MMW imaging, which is limited by the system. In terms of enhancing the resolution of a region of interest (ROI) image containing suspicious targets, super-resolution (SR) imaging is adopted via Bayesian compressive sensing (BCS) implemented by fast Fourier transform (FFT). The spatial sparsity of MMW ROI images is well exploited with BCS to achieve resolution enhancement without computational cost. Both simulated and measured experiments confirm that the proposed scheme effectively improves the resolution of ROI images.<\/jats:p>","DOI":"10.3390\/s22155757","type":"journal-article","created":{"date-parts":[[2022,8,1]],"date-time":"2022-08-01T23:49:27Z","timestamp":1659397767000},"page":"5757","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Resolution Enhancement for Millimeter-Wave Radar ROI Image with Bayesian Compressive Sensing"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3242-6351","authenticated-orcid":false,"given":"Pengfei","family":"Xie","sequence":"first","affiliation":[{"name":"School of Electronics and Communication Engineering, Sun Yat-Sen University, Shenzhen 518107, China"}]},{"given":"Jianxin","family":"Wu","sequence":"additional","affiliation":[{"name":"School of Electronics and Communication Engineering, Sun Yat-Sen University, Shenzhen 518107, China"}]},{"given":"Lei","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Electronics and Communication Engineering, Sun Yat-Sen University, Shenzhen 518107, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2435-2970","authenticated-orcid":false,"given":"Guanyong","family":"Wang","sequence":"additional","affiliation":[{"name":"Beijing Institute of Radio Measurement, Beijing 100854, China"}]},{"given":"Xue","family":"Jin","sequence":"additional","affiliation":[{"name":"Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1581","DOI":"10.1109\/22.942570","article-title":"Three-dimensional millimeter-wave imaging for concealed weapon detection","volume":"49","author":"Sheen","year":"2001","journal-title":"IEEE Trans. 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