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2-D geometric transformation object

A `geometricTransform2d`

object defines a custom 2-D geometric
transformation using point-wise mapping functions.

creates a `tform`

= geometricTransform2d(inverseFcn)`geometricTransform2d`

object and sets the inverse mapping
`InverseFcn`

property.

also sets the forward mapping property, `tform`

= geometricTransform2d(inverseFcn,fowardFcn)`ForwardFcn`

.

`transformPointsForward` | Apply forward geometric transformation |

`transformPointsInverse` | Apply inverse geometric transformation |

`affine2d`

| `geometricTransform3d`

| `imwarp`

| `projective2d`

| `rigid2d`