1. A method for determining whether a product image includes a logo pattern, the method comprising: retrieving, by a server, one or more logo patterns from a logo pattern library, each of the one or more logo patterns identifying a respective product brand; retrieving, by the server, a product image; calculating, by the server, for each of the one or more logo patterns, a matching degree, the matching degree representing a degree to which each logo pattern is present in the product image; selecting, by the server, as a selected logo pattern, the logo pattern having the greatest calculated matching degree; and determining, by the server, that the product image includes the selected logo pattern if the matching degree of the selected logo pattern is greater than a first threshold.