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; applying an image area restraint that constrains an allowable area of the selected image for identification of object components to an elevated area of the selected image; determining components that correspond to an object about the road in the allowable area of the selected image, the determined components being independent to scale of the object; comparing the determined components to reference components in a data library; when, 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; modifying a path segment attribute for the road in the master navigation database to include an association with the common road sign based on the identified common text pattern of the common road sign; and providing a navigation service from the master navigation database according to the modified attribute of the path segment.