The Study Of Cultural Relics Surface Texture Reconstruction Technique Based On Photography Principle

Any scenery surface in the nature exists abundant detail , which is called texture. The skill to emulate the surface's detail named texture mapping is an important research realm in computer Graphics.Recently, with the great development and extensive application of computer technique, a new research realm --real scenery reconstruction has arose and then the notion of real object surface texture reconstruction was put forward.Texture reconstruction is to reconstruct object's surface detail based on computer graphics technique through collecting and mapping original object's surface texture. The skill will play an important role in cultural relics computer reconstruction, panorama exhibition and broken cultural relics computer renovation .It will has a wide application foreground.Texture (colour texture) reconstruction was discussed extensively and thoroughly in this paper, which was based on the background. The paper's content could be seen as the following shows:(1) We elaborated the parameters of turntable's structure, the conditions and principles of collecting object's surface texture and how to set up coordinate systems (model coordinate system, camera coordinate system and photograph coordinate system )(2) The paper established the relation of correspond points among three coordinate systems based on the principle of taking photos, project transformation and deduced coordinate transform formula .To meet the demands of occlusion testing , a surface patches visibility algorithm was concerned.(3) Setting up a 3D object surface texture reconstruction system based on above mentioned algorithm, including: photograph pre-processing, setting up computer model, texture mapping and illumination.Finally, the paper chose OpenGL graphics software and VC++ platform to realize the surface texture reconstruction of a sphere, an imitation of an ancient china jar and a bowl with C/C++ and OpenGL language .Through the example, the feasibility of the system was verified.