Morphological Operations

Image: Right Triangle

Right triangle dilated and eroded by 1×2 rectangle

Right triangle dilated and eroded by 2×1 rectangle

Right triangle dilated and eroded by 2×2 square

Right triangle dilated and eroded by cross(3 pixels tall and wide)

Right triangle dilated and eroded by 2×2 diagonal

My predictions for a right triangle being dilated (black ink) and eroded(green ink) by the structuring elements located along the top. No green ink indicates that no pixels were left after erosion.