id author title date pages extension mime words sentence flesch summary cache txt ital-3262 Wan, Gary (Gang); Liu, Zao Content-Based Information Retrieval and Digital Libraries 2008-03-01 7 .pdf application/pdf 4656 270 57 The second method—the most popular technique used today—is text- based retrieval. One of the most well-known CBIR systems is query by image content (QBIC), which was developed by IBM. cache/ital-3262.pdf txt/ital-3262.txt