How to use

labelToBinary

method

in

boofcv.alg.filter.binary.BinaryImageOps

/**
 * 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.
 */
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);
}