code: public static GrayU8 labelToBinary(GrayS32 labelImage , GrayU8 binaryImage ,
  									   int numLabels, int ...selected )
  	{
  		boolean selectedBlobs[] = new boolean[numLabels];
  		for (int i = 0; i < selected.length; i++) {
  			selectedBlobs[selected[i]] = true;
  		}
  
  		return labelToBinary(labelImage,binaryImage,selectedBlobs);
  	}
docs: Only converts the specified blobs over into the binary image.  Easier to use version of
  {@link #labelToBinary(GrayS32, GrayU8, boolean[])}.
  
  @param labelImage Input image. Not modified.
  @param binaryImage Output image. If null a new one will be declared. Modified.
  @param numLabels Number of labels in the image.  This is the number of found clusters + 1.
  @param selected The index of labels which will be marked as 1 in the output binary image.
  @return The binary image.