naaman

Information about naaman

Published on November 2, 2007

Author: Marigold

Source: authorstream.com

Content

Slide1:  Adventures in Space and Time: Mor Naaman Digital Library Project, Database Group Stanford University Leveraging Geo-Referenced Digital Photographs Geo-referenced photos:  Geo-referenced photos Geo-photography Technology:  Geo-photography Technology + 1) 2) Outline:  Outline Personal Enhancing value of collection “Social” Enable sharing to create more value Personal Enhancing value of collection Enhancing Personal Collections:  Enhancing Personal Collections Browse/search for photos by location Detect events Add metadata from other sources Browsing by Location/Time:  Browsing by Location/Time Use a map to browse for photos wwmx.org from MSR: Map issues:  Map issues Lots of screen space Sparse Not intuitive for some Limited interaction? Automatically-Created Hierarchies:  Automatically-Created Hierarchies Location hierarchy Event hierarchy Our algorithm: Creates them simultaneously Such that they inform each other Assigns geo-names using gazetteers and Google Result of processing:  Result of processing Challenges:  Challenges Locations should be intuitive Events are tricky 3-days trip to NYC The kid’s soccer game, followed by a birthday party Good names are important. Location Hierarchy:  Location Hierarchy Photoshop Album (about 4 man-hours) Our PhotoCompas application (about 0 man-seconds) Location Hierarchy (US):  Location Hierarchy (US) San Francisco, Berkeley, Sonoma, CA -Stanford, Mountain View, Monterey, CA Monterey (58 miles S of San Jose)  Mountain View (4 miles NW of San Jose)  Stanford; Palo Alto (14 miles W of San Jose) -Colorado (219 miles W of Denver) -Long Beach (35 miles S of Los Angeles, CA) -Philadelphia, PA -Seattle, WA -Sequoia N.P. (153 miles E of Fresno, CA) -South lake Tahoe; Bear Valley, CA -Yosemite N.P.; Yosemite Valley, CA  Event “Hierarchy”:  Event “Hierarchy” PhotoCompas (about 0 man-seconds): 4-5 Oct 2003: Sequoia NP 12 Oct 2003: Stanford,CA 27 Nov 2003: Oakland,CA 30 Nov 2003: San Francisco,CA 5 Dec 2003: Stanford,CA 19 Dec 2003: Stanford,CA 24 Dec 2003: Palo Alto,CA … Photoshop Album (about 4 man-hours) Experiment 1: Processing:  Experiment 1: Processing Tested on 3 real-world geo-referenced photo collections Location hierarchy accepted by owners High accuracy (precision/recall) for events Names intuitive and accurate Experiment 2: Map vs. No Map:  Experiment 2: Map vs. No Map Paid 13 participants to “reference” their photos Loaded to WWMX and to PhotoCompas Most liked the map better, but… Performed the same for search/browse tasks Event notion helps overcome location handicap P.S. Some didn’t touch the map, yet used our location hierarchy. P.S.2 This was on a BIG screen! Enhancing Personal Collections:  Enhancing Personal Collections Browse/search for photos by location Detect events Add metadata from other sources Enhancing Personal Collections:  Enhancing Personal Collections Sources: web services, camera sensors Local time… easy but important! Day/night status – sunset photos, anyone? Weather – it was freezing! Demo!:  Demo! Outline:  Outline Personal Enhancing value of collection “Social” Enable sharing to create more value The Motivation:  The Motivation Finally, can share!:  Finally, can share! Location data is key for sharing The Vision: few label, many benefit:  The Vision: few label, many benefit Shared website / application / P2P system Simple Example:  Simple Example Hector takes a picture in front of Gates building Hector labels the photo. Label and coordinates recorded on LOCALE server “Gates building” Simple Example (Cont.):  Simple Example (Cont.) Mor takes a picture from the same location Too lazy to label. Mor’s computer contacts LOCALE server, gets Hector’s label “Gates building” Problems:  Problems May label the photo differently “A typical Stanford Scene” “Two Mating Squirrels” Problems:  Problems May be using a different name “CS building” Problems:  Problems May have pointed the camera in a different direction “Packard Building” Problems:  Problems May be just plain wrong “Packard Building” LOCALE: Location to Label:  Users submit labels and locations of photos Services for users: Search (their own photos) Label their photos Using IR techniques LOCALE: Location to Label LOCALE Submissions:  LOCALE Server User machine User labels LOCALE Submissions (label, location) pairs (label1,loc1) (label2,loc2) … No need for the photos! LOCALE Labeling:  LOCALE Labeling LOCALE Server User machine Lat,Lon Proposed Labels (label1,loc1) (label2,loc2) … Label:  Lat1,Lon1 “Mom and Dad”, Lat1, Lon1 “Empire State Building”, Lat2, Lon2 Lat2,Lon2 Label What will it Look Like?:  What will it Look Like? Stanford Campus Experiment:  Stanford Campus Experiment Gave Cameras and GPSs to visitors After tour, participants labeled their photos “Enjoying the beautious weather” “Hoover Tower & Fountain” “Crowds of Stanford students” “Fountain in Action” “Non-Denominational Church” The Numbers:  The Numbers 52 participants, 1100 photos (~21 photos each) 37 participants submitted 760 labels “Enjoying the beautious weather” “Hoover Tower & Fountain” “Crowds of Stanford students” “Fountain in Action” “Non-Denominational Church” Example Data – “????” labels:  Example Data – “????” labels Example Data – “Fountain” labels Example of Suggested Labels:  Example of Suggested Labels A Note About Privacy:  A Note About Privacy Notice previous page had no “personal” data “General” terms float, others sink. “IDF” can help identify stop words Anonymous submissions Search:  Search Lat1,Lon1 “Mom and Dad”, Lat1, Lon1 Lat2,Lon2 “Empire State Building”, Lat2, Lon2 Search Demo:  Search Demo Example Of Search:  Example Of Search Ranked results Find my “Hoover tower” photos Future Work:  Future Work Add time to detect “events” Outline:  Outline Personal Enhancing value of collection “Social” Enable sharing to create more value Thank You!:  Thank You! Advised: Andreas Paepcke, Hector Garcia-Molina Did the work: Susumu Harada, Yee Jiun Song, QianYing Wang Gets the credit: [email protected] http://www-db.stanford.edu/~mor/

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