How to compare charts, DS?

Question

Machine learning

Good afternoon! I am not a DS, but I need to solve the following problem:
you need to find a similar graph .

In the example, image 4 is closest to the original.

Tell me, how best to implement such functionality, and where to dig? Does Google Cloud or AWS have boxed services that can solve this problem?

PS Similarity is purely visual similarity. Absolute values ​​are not that important. In the case of the example, the graph rises, then falls, then rises again. The answer number 4 has the same behavior, so this is the correct answer

Answer 1

Correlation coefficient.