OpenCV with Python By Example

Affine transformations

In this section, we will discuss about the various generalized geometrical transformations of 2D images. We have been using the function warpAffine quite a bit over the last couple of sections, it's about time we understood what's happening underneath.

Before talking about affine transformations, let's see what Euclidean transformations are. Euclidean transformations are a type of geometric transformations that preserve length and angle measure. As in, if we take a geometric shape and apply Euclidean transformation to it, the shape will remain unchanged. It might look rotated, shifted, and so on, but the basic structure will not change. So technically, lines will remain lines, planes will remain planes, squares will remain ...