# Real-time Image Smoothing via Iterative Least Squares
 This is the released code for the following paper accepted to ACM Transactions on Graphics, presented on SIGGRAPH 2020
 
 *"Real-time Image Smoothing via Iterative Least Squares"*. Wei Liu, Pingping Zhang, Xiaolin Huang, Jie Yang, Chunhua Shen, Ian Reid. ACM Transactions on Graphics (TOG), 39(3), 1-24.
 
 **Requirements：**
 CUDA library is required if running with the GPU version.
 
 **Usage:**
 The Test.m manuscript provides examples of the usage.
 
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 **Related Work:**
 1. *"Semi-global weighted least squares in image filtering.", Wei Liu, Xiaogang Chen, Chuanhua Shen, Zhi Liu, and Jie Yang. In ICCV 2017.* [Code](https://github.com/wliusjtu/Semi-Global-Weighted-Least-Squares-in-Image-Filtering)
 2. *"Embedding bilateral filter in least squares for efficient edge-preserving image smoothing." Wei Liu, Pingping Zhang, Xiaogang Chen, Chunhua Shen, Xiaolin Huang, Jie Yang. IEEE Transactions on Circuits and Systems for Video Technology (2018).* [Code](https://github.com/wliusjtu/Embedding-Bilateral-Filter-in-Least-Squares-for-Efficient-Edge-preserving-Image-Smoothing)
 3. *"A generalized framework for edge-preserving and structure-preserving image smoothing." Wei Liu, Pingping Zhang, Yinjie Lei, Xiaolin Huang, Jie Yang, and Michael Ng. IEEE Transactions on Transactions on Pattern Analysis and Machine Intelligence (2021).* [Code](https://github.com/wliusjtu/Generalized-Smoothing-Framework)
 4.  *“Fast Global Image Smoothing via Quasi Weighted Least Squares.” Wei Liu, Pingping Zhang, Hongxing Qin, Xiaolin Huang, Jie Yang, Michael Ng, International Journal of Computer Vision, 2024.* [Code](https://github.com/wliusjtu/Q-WLS)