How to compare 2 images in php\python?

Question

PHP

The bottom line is this, there is a picture with several images, you need to get an id from the database for each image.
Previously, I have never come across an image comparison, I don’t know the subtleties / nuances / pitfalls.
I see 2 ways:
1) Through php using imageMagick
2) Through python and OpenCV
Interested in which of these two options is more accurate and easier to identify images?

Answer 1

Keep the solution in php.
Here GD and ImageMagick
usefuldevops.ru/blog/2013/11/07/sravnit '-dva-izobrazhieniia-s-pomoshch'iu-php/
It all depends on whether it is a local project or you will place it somewhere .
Here is python
www.intuit.ru/studies/courses/10621/1105/lecture/1...
As for me, OpenCV is easier, but this is my IMHO.
P.s.
Using OpenCV in conjunction with Python is convenient for creating simple applications, conducting first experiments, and creating prototypes. I note that almost all the functionality of the library is available in Python. Performance could be a weak point, but if you use the "vector-matrix" ideology, then you can get a fairly fast code. To do this, you should avoid processing images pixel-by-pixel and other arrays element-by-element in loops. Instead, use vector functions that operate on the entire image or array at once.