1. A method of detecting a common road sign from collected images to develop a master navigation database, the method comprising: collecting a plurality of images of geographic areas along a road; selecting an image of the plurality of images; determining components that correspond to an object about the road in the selected image, the determined components being independent to scale of the object; comparing the determined components to reference components in a data library; if, based on the comparison, the determined components substantially meet a matching threshold with the reference components, identifying the object in the selected image to be a common text pattern of a common road sign corresponding to the reference components in the data library; and developing a master navigation database based on identifying the object in the selected image to be the common text pattern of the common road sign.