1. A computer-implemented image feature matching method, comprising: performing, by a computer: selecting a target component image from a set of component images; selecting a component image subset including one or more of the component images in the set of component images, wherein said selecting a component image subset comprises: checking for user input specifying connectivity relationships among the component images in the set of component images for use in selecting the component image subset in accordance with the user input; and in response to determining that there is insufficient user input specifying connectivity relationships among the component images in the set of component images, selecting the component image subset in accordance with at least one of file information about the component images in the set of component images and previously generated geometric relationship information about the component images in the set of component images; and performing feature matching of the target component image to the component images in the selected component image subset.