Update README.md

README.md

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 * [2022-11-8] Our paper has been accpeted by ***ISPRS*** (International Society for Photogrammetry and Remote Sensing) !
 * [2022-5-27] Submit the manuscript to the journal.
 
-We are now refactoring the code, and it will be released as soon as possible.
 ## Hierarchical Loop-based Multiview Registration Framework
 HL-MRF can automatically perform the point-cloud-based registration for large-scale TLS scans without any artificial target. The main focus of our framework lies in the efficiency of processing large-scale TLS scans and being able to tolerate pairwise registration failure for robustness. The proposed hierarchical registration strategy and the loop-based coarse registration method deal with them respectively.