{"id":1152,"date":"2013-10-22T17:50:20","date_gmt":"2013-10-22T16:50:20","guid":{"rendered":"http:\/\/www.ceessnoek.info\/?p=1152"},"modified":"2013-10-23T07:28:19","modified_gmt":"2013-10-23T06:28:19","slug":"mm13-querying-for-video-events-by-semantic-signatures-from-few-examples","status":"publish","type":"post","link":"https:\/\/www.ceessnoek.info\/index.php\/mm13-querying-for-video-events-by-semantic-signatures-from-few-examples\/","title":{"rendered":"MM13: Querying for Video Events by Semantic Signatures from Few Examples"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" alt=\"query-by-video\" src=\"http:\/\/www.ceessnoek.info\/wp-content\/uploads\/2013\/10\/Screen-Shot-2013-10-22-at-18.47.49-e1382460525943.png\" width=\"325\" height=\"203\" align=\"right\" \/>The ACM Multimedia\u201913 paper on \u201c<em>Querying for Video Events by Semantic Signatures from Few Examples<\/em>\u201d by Masoud Mazloom, Amirhossein Habibian and Cees Snoek is <a href=\"http:\/\/staff.science.uva.nl\/~cgmsnoek\/pub\/mazloom-query-by-semantic-mm13.pdf\">now available<\/a>. We aim to query web video for complex events using only a handful of video query examples, where the standard approach learns a ranker from hundreds of examples. We consider a semantic signature representation, consisting of off\u000b-the-shelf concept detectors, to capture the variance in semantic appearance of events. Since it is unknown what similarity metric and query fusion to use in such an event retrieval setting, we perform three experiments on unconstrained web videos from the TRECVID event detection task. It reveals that: retrieval with semantic signatures using normalized correlation as similarity metric outperforms a low-level bag-of-words alternative, multiple queries are best combined using late fusion with an average operator, and event retrieval is preferred over event classi\fcation when less than eight positive video examples are available.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The ACM Multimedia\u201913 paper on \u201cQuerying for Video Events by Semantic Signatures from Few Examples\u201d by Masoud Mazloom, Amirhossein Habibian and Cees Snoek is now available. We aim to query web video for complex events using only a handful of video query examples, where the standard approach learns a ranker from hundreds of examples. We [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-1152","post","type-post","status-publish","format-standard","hentry","category-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>MM13: Querying for Video Events by Semantic Signatures from Few Examples - Cees Snoek<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ceessnoek.info\/index.php\/mm13-querying-for-video-events-by-semantic-signatures-from-few-examples\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MM13: Querying for Video Events by Semantic Signatures from Few Examples - Cees Snoek\" \/>\n<meta property=\"og:description\" content=\"The ACM Multimedia\u201913 paper on \u201cQuerying for Video Events by Semantic Signatures from Few Examples\u201d by Masoud Mazloom, Amirhossein Habibian and Cees Snoek is now available. We aim to query web video for complex events using only a handful of video query examples, where the standard approach learns a ranker from hundreds of examples. We [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ceessnoek.info\/index.php\/mm13-querying-for-video-events-by-semantic-signatures-from-few-examples\/\" \/>\n<meta property=\"og:site_name\" content=\"Cees Snoek\" \/>\n<meta property=\"article:published_time\" content=\"2013-10-22T16:50:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2013-10-23T06:28:19+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.ceessnoek.info\/wp-content\/uploads\/2013\/10\/Screen-Shot-2013-10-22-at-18.47.49-e1382460525943.png\" \/>\n<meta name=\"author\" content=\"Cees\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Cees\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.ceessnoek.info\/index.php\/mm13-querying-for-video-events-by-semantic-signatures-from-few-examples\/\",\"url\":\"https:\/\/www.ceessnoek.info\/index.php\/mm13-querying-for-video-events-by-semantic-signatures-from-few-examples\/\",\"name\":\"MM13: Querying for Video Events by Semantic Signatures from Few Examples - 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