FREAK – fastest scale and rotation invariant matching

The last descriptor available in Julia is the FREAK descriptor, which was developed in 2012. The algorithm introduces a new keypoint descriptor inspired by the human visual system and, more precisely, the retina, coined the Fast Retina Keypoint (FREAK).

FREAKs are in general quicker to calculate with lower computational requirements. It makes them a great alternative to the methods covered in the preceding section. FREAK is considered to be the fastest scale, rotation, and noise invariant algorithm.

The code examples stay very similar to those we have already seen. First, we load the packages and images by using the following code:

using Images, ImageFeatures, CoordinateTransformations, ImageDraw, ImageView

img1 = Gray.(load("cat-3417184_640.jpg"))
img2 = Gray.(load("cat-3417184_640_watermarked.jpg&quot...