This is the released code for the following paper accepted to International Journal of Computer Vision:

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 (IJCV), 2024

Usage:

1. run mexFile.m in the "funs" folder to compile all the C files first.
2. run the example functions for different tasks.

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
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
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
4. "Real-time Image Smoothing via Iterative Least Squares", Wei Liu, Pingping Zhang, Xiaolin Huang, Jie Yang, Chunhua Shen and Ian Reid. ACM Transactions on Graphics, 2020, (presented on SIGGRAPH 2020). Code