multimedia/video search

A. Frank

Multimedia/Video Search

חיפוש מולטימדיה בדגש חוזי

אריאל פרנקמחלקה למדעי המחשב

אוניברסיטת בר-אילן[email protected]

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Contents

• Multimedia (MM) and search/retrieval

• Text-based MM search in General SEs

• Text-based MM search in Vertical SEs

• Tag-based MM search

• Content-based MM search

• Video downloads

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Multimedia Resources

• ,Pictures, Photos, Maps, Graphics) תמונות Animations)

• (Audio, Sounds) שמע

• (Music, MP3)מוסיקה

• (Radio, Podcasts, Speeches) הקלטות

• (Video, Flash, Vlogs)חוזי

• (Movies, TV) סרטים

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MM Search & Information Retrieval (MMIR)

• Search & information retrieval of multimedia objects is hard!!

• Using SEs to find relevant, quality MM objects can be difficult and frustrating.

• Sample query: find a movie that has a large mouse chasing a Persian cat with twins watching from above?

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MM Search & Information Retrieval (MMIR)

• Common MM search is mainly text-based; the object text is derived from:– caption of the MM object

– text surrounding the MM object

– entire text of the containing page

– filenames of MM object and the containing page

– manual/automatic annotations

• Recently, tag-based MM search is becoming effective (social computing).

• Fortunately, long due, content-based MM search on the Web is forthcoming.

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Contents






• Video downloads

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General SEs Sample

• Google (general, video)

• Yahoo (general, audio)

• AOL (general, video)

• MSN/Live (images, video)

• AltaVista (images, audio, video)

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Multimedia: Google

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Multimedia: Google

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Multimedia: Yahoo

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Yahoo Audio Search

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AOL Video Search

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MSN Live

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Multimedia: MSN Live

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AltaVista Multimedia Search

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Contents






• Video downloads

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Vertical SEs Sample

• Picsearch (image)

• FindSounds (audio)

• SearchVideo (video)

• Clipblast! (video)

• Flurl (multimedia)

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Images: Picsearch

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Picsearch Advanced Interface

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Audio: FindSounds

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Types of Sounds

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Video: SearchVideo

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Video: Clipblast!

• Organizes and makes the video Web relevant, fast and simple to navigate.

• Video Search and Navigation technology makes it easy to search, browse and personalize the video that viewers want, when they want it.

• Crawls the entire Web for all video content available, indexing more video content providers than any other video search engine.

• Largest video distribution platform ever.

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Video: Clipblast

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Multimedia: Flurl

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Flurl list of sites

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Contents






• Video downloads

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Tag-based Search Sample

• Flickr (image)

• Panoramio (image, maps)

• YouTube (video)

• Keotag (multimedia)

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Flickr

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Flickr

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Flickr

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Image/Maps: Panoramio

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Video: YouTube

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Keotag Meta-SE

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Keotag Meta-SE

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Contents






• Video downloads

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“Content-based“ Image Search/Retrieval

• “Content based” image DB or Web site(s) that contain a large number of images.

• Image analysis techniques used to describe images by their extracted visual features such as color, texture, shape and orientation.

• These objects can be represented by sets of image features and then compared with the sets extracted from other images.

• Feature sets are described by their statistics, and the computer searches for statistically likely matches.

• Queries can be formulated in terms of visual features or by similarity options.

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Content-based Search Sample

• Squid (image)

• retriever (image)

• Melodyhound (audio)

• Musipedia (music)

• Blinkx (video)

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Image: Squid

• Has about 1100 images of marine creatures in its database.

• Each image shows one distinct species on a uniform background.

• Every image is processed to recover the boundary contour, which is then represented by three global shape parameters and the maxima of the curvature zero-crossing contours in its Curvature Scale Space (CSS) image.

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Images: Squid

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Images: Squid

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Images: Squid

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Images: Squid

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Image: retriever

• Experimental service which lets you search and explore in a selection of Flickr images by drawing a rough sketch.

• Matches the most pronounced shapes and slabs of colors.

• The results are usually fairly good, sometimes even stunning,

• But it doesn't do object/face recognition of any kind, so if drawing an outline sketch of a chair, it almost certainly won't get you one back.

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Images: retriever

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Images: retriever

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Images: retriever

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MelodyHound

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MelodyHound

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MelodyHound

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MelodyHound

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Musipedia

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Audio: MusiPedia

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Music: Musipedia

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Musipedia or Web Search?

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Video: Blinkx

• World's largest and most advanced video search engine.

• Use of visual analysis and speech recognition to better understand rich media content.

• Advanced image and audio analysis techniques are used to automatically extract information about a video in real time and to create a rich index about the video content.

• Automatically and implicitly conducts searches based on the content being viewed by each individual user.

• With the advent of blinkx TV, users can now search and access news, movie trailers, popular multimedia segments and other video formats on demand.

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Video: Blinkx

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Video: Blinkx

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Blinkx TV Architecture

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Contents






• Video downloads

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Video downloads

• Nearly none of the video search/sharing sites provide a simple one-click button to download video clips.

• If video download needed, various workarounds exist (ordered by preferred methods, if some not working):

1. Right-click on link -> “Save Target/Link As”.2. Install/use the Firefox VideoDownloader Extension,

from Mozilla addons site, to download video (and audio).3. Copy video link into KeepVid site and download from

the provided link (usually saving it as FLV file).4. View -> “(Page) Source”, locate video filename/format,

and look in its directory, or search for it (filetype:, contains:). 5. Use Applian Technologies streaming capture applications

to record streaming audio/video into a file.

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VideoDownloader

• A Mozilla Firefox Extension that downloads all embedded MM objects on a page including video.

• Just click the icon to download the watched video.• VideoDownloader

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Keepvid

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“View Source” techniques

How to get playing VideoDownloader Flash file!?

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“View Source” page

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File name/path search & save

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Applian’s A/V Streaming Capture Suite

• Replay A/V & Media Catcher are the simplest and most powerful ways to capture Video and Audio from the Web on your PC.

• Capture Windows Media, Real, Streaming MP3, Streaming Flash Animations and Video.

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References

• Kate Greene, Better, More Accurate Image Search, Technology Review, April 9, 2007, http://www.technologyreview.com/Infotech/18501/

• Kate Greene, Surfing TV on the Internet, Technology Review, April 18, 2007, http://www.technologyreview.com/Infotech/18545/

• Amit Agarwal, 10 Interesting Things You Can Do with YouTube or Google Videos, Digital Inspiration (Blog), July 27, 2006, http://labnol.blogspot.com/2006/07/10-interesting-things-you-can-do-with.html

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