Affine Mapping - Tutorial

Affine Mapping - Tutorial

The ImageJ plugin Affine_Mapping performs a geometric transform requiring 3 control points.

Preliminaries:

Download and unzip example image: source.zip.

Download and install the package Geometric Mappings.

Proceeding:

Open source image:
File > Open... source.png

Open target image:
File > New > Image... OK
>notice: same image type as source image recommended

Click Polygon selections:
3rd button from the left

Create a polygon with 3 sides on both images:
create 3 points with the left mouse button and
click the first point again to close the polygon

>notice: the first point of the polygon is coloured

Select Affine Mapping and choose settings:
Plugins > GeometryMappings > Affine Mapping
choose settings and press OK

>notice: if you don't create a new window the new image will replace the Target geometry image

Result: