How to extract features?

Question

first of all what is the features in terms of image ?
and in image processing, how we can extract the features from images and which language is much suitable to do so...whether python or c...and which library needs to do so...pls explain...

Answer 1

a Feature is something you can "measure" or calculate. there is not the feature but several features you can use or learn.
the important thing with features is, that they should describe uniquely your (scene, face, object)
for eample: edges ( canny), corners, and so on.
normally you decide or learn which features you use, maybe depends on your task.

a good start is opencv, it exists for python and c/c++.
https://opencv.org

at the beginning it is hard to use it. use a tutorial and Google extensively ;)

[hint]
hint: all cvStuff is c, the rest c++ if you ask your self what's the difference

Answer 2

thx