This book constitutes the refereed proceedings of the 10th International Workshop on Combinatorial Image Analysis, IWCIA 2004, held in Auckland, New Zealand, in December 2004. The 55 revised full papers presented together with 3 invited papers were carefully reviewed and selected from 86 submissions. The papers are organized in topical sections on discrete tomography, combinatorics and computational models, combinatorial algorithms, combinatorial mathematics, digital topology, digital geometry, approximation of digital sets by curves and surfaces, algebraic approaches, fuzzy image analysis, image segmentation, matching and recognition.