RWTH W2D - The RWTH Aachen Two-Dimensional Image Warping Software

RWTH W2D is a software package for two-dimensional image warping for recognition. It has been developed by the Human Language Technology and Pattern Recognition Group at the RWTH Aachen University. OCR, image retrieval, and face recognition systems developed using this framework have been applied successfully in several international research projects and corresponding evaluations.

W2D Warping Example


Different pixel deformation models are included:

Terms of Use

RWTH W2D is free software; it can be redistributed and/or modified under the terms of the RWTH W2D License. This license includes free usage for non-commercial purposes as long as any changes made to the original software are published under the terms of the same license. Other licenses can be requested.

Users must cite the authors of the Software upon publication of results obtained through the use of original or modified versions of the Software by refering to the following publication:

T. Gass, L. Pishchulin, P. Dreuw, and H. Ney: "Warp that Smile on your Face: Optimal and Smooth Deformations for Face Recognition". In IEEE International Conference Automatic Face and Gesture Recognition (FG), Santa Barbara, CA, USA, March 2011.

For usage of the Two-Level Dynamic Programming algorithm refer to:

H. Hanselmann, H. Ney, and P. Dreuw: "Pose-invariant Face Recognition with a Two-Level Dynamic Programming algorithm". In Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA), Madeira, Portugal, June 2013.


To download the W2D demo system, please fill out the form below. We will send you an email about how to proceed with the download.

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Coming soon

Related Work

Older Software Versions

Note: an older release of this software is still available from our webpages.