How to compare the identity of an object in a reference photo and a new photo on a mobile device?

Question

Mobile development

Case - the user sees a photo of some landmark and must take a picture of it from the same angle.
Is it realistic to determine the identity of objects on a mobile device (ios / android) without an Internet connection, given that the weather and seasons can be different?

Answer 1

Yes.
The simplest option is to apply contour borders (moreover, you can do it on the viewfinder with a reference photo in a translucent mode) and display the correspondence scale at the moment the camera is aimed at the desired angle.
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Answer 2

Something like this