The surfaces of walls of the Mogao caves are not smooth.Confined to the current digital devices and methods,acquisition of digital mural images shows a series of problems,such as the perturbation from different photographing distance,uncertainties of image acquisition and integration plane,a certain angle between the image acquisition and integration plane,and the projection surface used for positioning and correct fitting.A three-dimensional model is used to acquire accurate curvature parameters of photographed walls and solve these problems,not only improving the quality and fidelity of panoramic images,but also standardizing the process of image acquisition.
