How Does Pixelated Censorship Work and Why is Uncensoring a Pixelated Image Hard/Impossible to Do?

Question

I’m not entirely sure how this works.

In: Technology

Answer 1

Pixilation works by basically averaging all the pixels in an area to come up with a single color, then filling the area all those pixels covered with that single color.

For example, suppose I have the numbers: 19, 43, 46, 10, 47, 26, and 15. I average them together to get 29.

Now given the number 29 can you figure out what all the individual pixel values were? Of course not, information was lost with the averaging operation. In this same way you can’t reverse the process of pixilation because it removes information from the image.