Introduction and Background


Introduction

The following material refers to landmarks. A user specifies feature points on a face to create landmarks. Given enough data, a program can normalize the landmarks and average the feature points to create an "average" face. Next, any given face can be warped to the shape of the average face. If many images are warped to align with the average face, the image data (not just landmarks) can be blended to create a "photo" of the average face. The method I used to warp the image data was based on thin-plate spline warps from Dr. Fred Bookstein. Such warps minimize a "bending energy" basis function.

Is this technique new? F. Galton (see reference list) reported averaging faces as early as 1878 by taking multiple photographic exposures. To minimize the blur, he matched eye positions of each face. In retrospect, matching eyes anchors the rough position and orientation of the face, almost like a primitive procrustes normalization.


Background

This site about entomology and insects tickled my fancy.
I also like Daddy long legs spiders.
And of course beetles are cute as well.
Maybe not as cute as these roly poly little fellows though.
These guys have two hundred left feet.
Therefore these suckers must have two deci-left feet, maybe?
If you see one of these ugly ticks, I'd steer clear of them. I didn't realize that scorpions belonged to the Archnida class with some of these other critters.
There's only one scorpion, but lots of spiders that live in Kentucky.