You are looking at your friend's pictures on his smartphone. One of them is really blurry, but you still can tell who it is. What is missing from this picture?

Question

Quizplus · Accepted Answer

High-frequency details, which include edges and fine details, are missing in a blurry picture, making it hard to see clear outlines and textures. Low-frequency details, which represent the general shape and colors, are still recognizable, allowing you to identify the subject.

You Are Looking at Your Friend's Pictures on His Smartphone