**Distance Transform Functions**

L2RDistance |
Returns an image of the distance of each white pixel from its
nearest left edge in its corresponding blob |

R2LDistance |
Returns an image of the distance of each white pixel from its
nearest right edge in its corresponding blob |

T2BDistance |
Returns an image of the distance of each white pixel from its
nearest top edge in its corresponding blob |

B2TDistance |
Returns an image of the distance of each white pixel from its
nearest bottom edge in its corresponding blob |

3x3Distance |
Returns an image of the distance of each white pixel from its
nearest edge in its corresponding blob using a 3x3 window of
examination |

5x5Distance |
Returns an image of the distance of each white pixel from its
nearest edge in its corresponding blob using a 5x5 window of
examination |

GFTransform |
Returns an image of the distance of each white pixel from its
nearest edge in its corresponding blob using a step-in approach |