This book constitutes the refereed proceedings of the 4th International Conference on Image and Video Retrieval, CIVR 2005, held in Singapore, in July 2005.

The 20 revised full papers and 42 poster papers presented together with an introduction and 4 invited papers were carefully reviewed and selected from 128 submissions. Besides the invited and industrial presentations the papers are organized in topical sections on video retrieval techniques, video story segmentation and event detection, semantics in video retrieval, image indexing and retrieval, image/video annotation and clustering, interactive video retrieval and others, image/video retrieval applications, and two sections comprising the poster presentations on video processing, retrieval and multimedia systems and on image feature extraction, indexing and retrieval.