Research Of Image Matching Strategy On Multi-source Control Point Images And Design Of Control Point Images Database

Image matching is hardcore techonology that digital photogrammetry achieve automatic survey. The main research contains precision and reliability of Image matching as well as adaptability and speed of arithmetic. traditional image matching is based on survey control point. veracity and efficiency of image matching is decreased not only because It is difficult to distinguish and confirm corresponding point on image only by the value of coordinate, but also in respect that it needs information of topographical map and so on to confirm the position of point If we realize automatic selection of control point image and automatic matching of target image by the way of building and managing database of control point image, we not only improve efficiency and veracity of image matching, but also ensure control point security. Further more, we achieve effective manage and use control point production.Based on the analysis of previous image matching technology, this paper builded control point image database and added image information and correlative descriptive information of part area of corresponding control point on primary control point database. We match target image rapidly using control point whic pass muster. It come down to multi-source remote sensing images matching by the reason of control points from different source which are saved in control point image database have different sensors, different time, different resolution, different geometric and radial feature, while target image is specific image. We designed and built multi-source control point database, discussed matching technology of multi-source emote sensing images feature relationship based on feature, realized multi-source remote sensing images matching and elementary confirmation of control point position. Besides, we achieve database application based on selecting mature database management system and GIS software as foundation of database building.This paper studied and analysed the matching method of target image and control point image based on control point image database, realized the arithmetic of feature extraction and matching of target image and control point image. Then we validated the arithmetic's feasibility. Meanwhile, we designed and built control point image database. The study has practical value in management and application of control point image and improvement of image matching efficiency.