Sparse codes as Alpha Matte
نویسندگان
چکیده
Matting is a useful tool for image and video editing where foreground objects need to be extracted and pasted onto a different background. A matte is represented by α which defines the opacity of a pixel and is a value in [0, 1], with 0 for background (B) pixels and 1 for foreground (F) pixels. There are three main approaches for image matting: In samplingbased approaches, a foreground-background sample pair is picked from few candidate samples taken from F and B regions by optimizing an objective function. This (F,B) pair is then used to estimate α at a pixel with color I by
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