In the process of building virtual worlds

it is very important to get the textures of irregular objects. Many texture acquirement techniques have been proposed in recent years. However

suffering from costly equipment and the ambiguity of texture presentation

these currently available approaches cannot meet the requirements of the conservation and presentation of digital heritages. To overcome these problems

a new algorithm on generating cylindrical textures of irregular objects is presented in this paper. Based on the homochromatic geometric models of objects and the photo sequences shot around them

the algorithm generates the textures of irregular objects by transferring the color information of the photo sequences to the cylindrical texture maps. It consists of three steps: first

building the mapping relations between the pixels on the photos and the pixels on the texture map by projective transformation

second

acquiring partial textures from respective photos and at last

combining these partial textures into integrated one by mosaicing. The algorithm is runtime-controllable and has low quality requirement of source photos. It has been applied to the Digital Rebuilding and Restoration System of Dunhuang Culture Relics and gets good results.