Update papersUsingFLIP.md

misc/papersUsingFLIP.md

@@ -214,6 +214,8 @@ Please let us know if you know of more papers that use/cite ꟻLIP.
 
 1. Rohan Sawhney, Daqi Lin, Markus Kettunen, Benedikt Bitterli, Ravi Ramamoorthi, Chris Wyman, and Matt Pharr, ["Decorrelating ReSTIR Samplers via MCMC Mutations"](https://dl.acm.org/doi/full/10.1145/3629166), ACM Transactions on Graphics, vol. 43, no. 1, pp 1–15, 2024.
 
+1. Qian Fu, Linlin Liu, Fei Hou, and Ying He, ["Hierarchical vectorization for facial images"](https://link.springer.com/article/10.1007/s41095-022-0314-4), Computational Visual Media, vol. 10, pages 97–118, 2024.
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