This text constitutes the refereed proceedings of the 8th International Conference on Discrete Geometry for Computer Imagery, DGCI 99 held in Marne la Valle, France in March 1999. The 24 revised full papers presented were selected from a total of 41 submissions. Also included are four invited papers and seven poster presentations. The volume is divided in topical sections on discrete objects and shapes, planes, surfaces, reconstruction, topology, distance and object recognition, thinning, discretization and visualization.