48+ Thatcher Illusion Images. The thatcher illusion is fairly well studied in the science of visual perception. We're still not exactly sure how the illusion works.

Adele And The Margaret Thatcher Effect Psychology In Action
Adele And The Margaret Thatcher Effect Psychology In Action from static1.squarespace.com
Face perception is impaired for inverted images, and a prominent example of this is the thatcher illusion: If you've forgotten about it, here's the best example i've found (from schwaninger et al.1) both the top and bottom pairs. Why does the effect occur?

Highly familiar faces were often thought to be processed in a pronounced configural mode, so they seem ideal candidates to be tested in one thatcher study against unfamiliar.

They only work in the ranges where they've been trained. This app is based on javafx and opencv subsequently it detects eyes and mouth in the face and if all parts are detected, the app creates a margaret thatcher illusion from this by flipping. The thatcher illusion has been used to demonstrate the importance of orientation when processing configural information within faces. The thatcher illusion is an intriguing visual phenomenon that can reveal deep insights about face processing in the brain.