红外与毫米波学报2024，Vol.43Issue(4)：541-550,10.DOI:10.11972/j.issn.1001-9014.2024.04.014
基于希尔伯特空间曲线填充的太赫兹图像超分辨算法研究
Terahertz imaging super-resolution algorithm based on Hilbert spatial curve filling
摘要
Abstract
The performance of radiation sources and detectors currently limits terahertz imaging technology,which still requires further improvement in terms of detail resolution,imaging speed,and noise suppression.This paper proposes a terahertz image super-resolution algorithm based on spatial curve filling.The ViT(Vision Transformer)structure back-bone network is utilized to extract terahertz image features through an attention mechanism.A Hilbert spatial curve is constructed to reconstruct the image according to the feature map using the curve filling method.Lightweight one-di-mensional convolution processing is used for reconstructing image features,while inverse transformation of reconstruct-ed maps restores the image's spatial structure.Finally,pixel reorganization enables up sampling to obtain an output im-age with enhanced object contour and details.Experimental results show that compared with conventional ViT struc-tures,this proposed method improves Peak Signal-to-Noise Ratio(PSNR)by 0.81 dB and Structural Similarity Index(SSIM)by 0.007 4,which effectively inhibits the noise influence on texture and significantly improves the resolution and image quality.关键词
太赫兹成像/超分辨重建/注意力机制/空间曲线Key words
terahertz imaging/resolution enhancement/attention mechanism/space curve分类
数理科学引用本文复制引用
杨墨轩,赵源萌,刘昊鑫,刘祎,吴悠,张存林..基于希尔伯特空间曲线填充的太赫兹图像超分辨算法研究[J].红外与毫米波学报,2024,43(4):541-550,10.基金项目
国家自然科学基金(61875140) （61875140）
科技创新服务能力建设-高精尖创新中心-成像技术高精尖创新中心(19530012003) （19530012003）
校内专项--学位点建设与研究生教育质量提升(008-2355093) Supported by the National Natural Science Foundation of China(61875140) （008-2355093）
Scientific and technological innovation service capac-ity building-Advanced Innovation Center-Advanced Innovation Center for Imaging Technology(19530012003) （19530012003）
Campus Project--Construction of De-gree Sites and Improvement of Graduate Education Quality(008-2355093) （008-2355093）
