Istituto di Scienza e Tecnologie dell'Informazione     
Banterle F., Corsini M., Cignoni P., Scopigno R. A Low-Memory, Straightforward and Fast Bilateral Filter Through Subsampling in Spatial Domain. In: Computer Graphics Forum, vol. 31 (1) pp. 19 - 32. Blackwell Publishing Ltd, 2012.
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.
DOI: 10.1111/j.1467-8659.2011.02078.x
Subject Fast Bilateral Filter
Cross Bilateral Filter
Joint Bilateral Filter
Graphics Hardware
I.4.1 [Image Processing and Computer Vision]: Enhancement; Filtering
I.3.3 [Computer Graphics]: Picture/Image Generation; Bitmap and framebuffer operations

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