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Just starting out: matching terminology with desired goal

Hi folks,

I'm just starting out with OpenCV (and image recognition/computer vision in general). My goal right now is simply to hold up an image to my webcam and determine which image I'm holding up based on a database of images on my computer.

My problem is I'm not sure how to rephrase my goal into terminology that matches OpenCV's feature set. Is this an object recognition problem? Thresholding? Template matching? Any hints as to what libraries I should be focusing on?