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A Low-Memory, Straightforward and Fast Bilateral Filter Through Subsampling in Spatial Domain
Article first published online: 1 DEC 2011
DOI: 10.1111/j.1467-8659.2011.02078.x
© 2012 The Authors Computer Graphics Forum © 2012 The Eurographics Association and Blackwell Publishing Ltd.
Additional Information
How to Cite
Banterle, F., Corsini, M., Cignoni, P. and Scopigno, R. (2012), A Low-Memory, Straightforward and Fast Bilateral Filter Through Subsampling in Spatial Domain. Computer Graphics Forum, 31: 19–32. doi: 10.1111/j.1467-8659.2011.02078.x
Publication History
- Issue published online: 28 FEB 2012
- Article first published online: 1 DEC 2011
- Accepted 9 October 2011.
Keywords:
- bilateral filter;
- cross-bilateral filter;
- real-time filtering;
- video denoising;
- edge-aware painting;
- GPU techniques
- I.4.1 [Image Processing and Computer Vision]: Enhancement;
- Filtering I.3.3 [Computer Graphics]: Picture/Image Generation;
- Bitmap and framebuffer operations
Abstract
In this work we present a new algorithm for accelerating the colour bilateral filter based on a subsampling strategy working in the spatial domain. The base idea is to use a suitable subset of samples of the entire kernel in order to obtain a good estimation of the exact filter values. The main advantages of the proposed approach are that it has an excellent trade-off between visual quality and speed-up, a very low memory overhead is required and it is straightforward to implement on the GPU allowing real-time filtering. We show different applications of the proposed filter, in particular efficient cross-bilateral filtering, real-time edge-aware image editing and fast video denoising. We compare our method against the state of the art in terms of image quality, time performance and memory usage.