Reading between the lines—a method for extracting dynamic 3D with texture
Marc Proesmans, Luc Van Gool · 1997
A method is presented that extracts the 3D shape of objects, together with their surface texture.Both shape and texture are obtained from a single image.The paper sketches the complete system but focuses on the problem of texture extraction.The underlying principle is based on an active technique.A high resolution pattern is projected onto the object and the deformations as observed by a single camera yield the 3rd dimension.The surface texture is extracted from the same image by literally reading between the lines that are used for the shape extraction.This is done using a combination of interpolation and non-linear diffusion techniques.Because the whole procedure is based on a single image, a frame-byframe reconstruction of a video taken with the pattern projected throughout, yields 3D shape dynamics. A paradigm shift in 3DMost methods for three-dimensional shape extraction go via the explicit calculation of the distance between the sensor and the object.The 3D shape of the surface then follows from the variation of this distance.This is what 3D acquisition devices for reverse engineering, shape inspection, and mobile robotics wotild typically do.More recent applications, however, focus on visualization, such as virtual and augmented reality, 3D on the Internet, special effects in movies, etc.These kind of applications come with different priorities: l Extracting the absolute scale of objects usually is not crucial.Objects.will be shown at completely different scales anyway.