1. An information acquisition and identification system comprising: an image characteristics storage configured to store image characteristics of textured patterns formed over an n-dimensional symbol displaying information on a part, a product, or a product including the part as its component on component or products, wherein n is a natural number; and a processor programmed to: extract an image of the n-dimensional symbol and an image of a textured pattern over the n-dimensional symbol from an image including at least the n-dimensional symbol and a textured pattern formed on the part or the product; acquire information on the part or the products from the extracted image of the n-dimensional symbol; identify the part, the product, or the product including the part as its component by matching image characteristics of the extracted image of the textured pattern with image characteristics stored in the image characteristics storage; and extract the image of the textured pattern by removing a high frequency component corresponding to granularity of a satin finished surface from a captured image and taking a difference between the captured image and an image captured after the high frequency component is removed.