how does one do a reverse image search, and how does this technology work?

Question

how does one do a reverse image search, and how does this technology work?

In: Technology

Answer 1

Each image has a level of the three primary colour e.g 94 red, 66 green, 34 blue which make up each pixel and show one colour. An example is a picture of a yellow dress so 50 red and 50 green with 0 blue. There are thousands of pixels in just a small section of every image (depending on the size).

Anyway every picture is then translated into mathematical code depending on the pixels and locations etc which a search engine compares to others.