Inheritance diagram for prapi::texture::OpponentColorLBP< T >:
The difference between OC-LBP and its gray-scale correspondent is that in OC-LBP, the center pixel and the neighborhood can reside on separate color channels, hence the name. There are a total number of nine possible combinations, as both the center and the neighbors can be taken from three color channels (R,G,B). For illustration of the possible neighborhood settings for the case involving eight neighborhood samples, see the illustration below. In the figure, the color channel of the neighborhood center is lower case for clarity.
RRR RRR RRR GGG GGG GGG BBB BBB BBB RrR RgR RbR GrG GgG GbG BrB BgB BbB RRR RRR RRR GGG GGG GGG BBB BBB BBB
|OpponentColorLBP (int centerChannel=0, int surroundChannel=0)|
|Create a new OpponentColorLBP feature extractor/image transform with the given center and neighborhood color channels.|
|int||getValue (RGBColor< T > center, util::List< RGBColor< T > > &surrounding)|
|Subclasses must implement this method to return a transformed value for a center pixel given a known circular neighborhood. |
|util::List< int >||getFeatureVector (const util::Matrix< RGBColor< T > > &mat) throw (FeatureExtractionException&)|
|void||setMapping (int *mapping, int maxVal)|
|void||setMapping (LBPMapping::MappingType type)|
|void||setChannels (int centerChannel, int surroundChannel)|
|Set the center and surrounding color channels.|
|Get the color channel of the center pixel.|
|Get the color channel of the neighborhood.|
Subclasses must implement this method to return a transformed value for a center pixel given a known circular neighborhood.
The default implementation returns 0. This method is called for each pixel in an matrix from getTransformedImage(Matrix<U>&). For example, the local variance operator returns the variance of the values in surrounding. LBP, in turn, compares each value in surrounding to the value of the center pixel, and builds up a binary code that it then returns.
Reimplemented from prapi::texture::CircularLocalSampler< int, RGBColor< T > >.