[FFmpeg-devel] [PATCH] [GSOC] avfilter: added guided filter

[Andrey Moskalenko]

 > Maybe not only use multithreading for speedup, also need some
 > algorithms to improve it.
 > What about the speedup compare data?
Additionally, a fast implementation of box filtering is used and 
sub-sampling as recommended in https://arxiv.org/abs/1505.00996. Current 
implementation outperforms the existing bilateral filter in terms of 
speed and quality on my 8-core CPU. The speed depends significantly on 
the sub-sampling parameter. With sub = 4, for example, the filter works 
110 FPS against 74 FPS for the bilateral one with the same spatial radius.