<p>I think you are looking for something called <a href="https://arxiv.org/abs/1610.02984" rel="nofollow noreferrer">ReID</a>. There are a lot of papers about it in CVPR2018.</p>

<p>You can imagine that you would need some sort of stored characteristic vector for each person. For each detected person, gives a new ID if it does not match any previous record, or returns the ID if it does match a record. The key is how to compute this characteristic vector. CNN features (intermediate layer) can be one. Gaussian mixtures of color of the detected human patch can be another.</p>

<p>It is still a very active research field and I think it would be quite hard to make a accurate one if you don't have much resources/time at hand.</p>
Object Identification Using OpenCV
<p>Currently I am researching about viable approaches to identify a certain object with the image processing techniques. However I ams struggling finding them. For example, I have a CNN capable of detecting certain objects, like a person, then I can track the person as well. However, my issue is that I want the identify the detected and tracked person like saving its credentials and giving an id. I do not want something like who is he/she. Just giving an id in that manner.</p>

<p>Any help/resource will be appreciated.</p>