Four aspects of relevance:content, time, location

and network

Pasi Fränti, Jinhua Chen and Andrei Tabarcea

MOPSIPROJECTMOPSI

PROJECTUNIVERSITYOF EASTERN

FINLAND

UNIVERSITYOF EASTERN

FINLAND

• Search engines• Recommendation systems• Web mining• Event detection• Push/pull notifications• Clustering• Social networks• GPS tracectory analysis• Road network extraction

Preliminary content

wwwwwwwwwwww

Data Collection in MOPSI System

GPS

Data collector:

Other users:

MOPSI webpage/ Facebook

Service directory

N 62.63 E 29.86

User collection

Last skiing of winter

User: Pasi

Last skiing of winterDate: 4.4.2010Location: N 62.63 E 29.86Arppentie 5, Joensuu

User: Pasi

Keywords: skis, forest, snow Informal description

Relevance defined by the network of the user

Date and time (not expected in July)

1. Content

2. Time

3. Location

4. Social network

Exact coordinates Address for usability

Four aspects of relevanceExample from practice

1. Content2. Time

3. Location

4. Network

Last skiing of winterDate: 4.4.2010Location: N 62.63 E 29.86Arppentie 5, Joensuu

Content of picture

Keywords orinformal description

snow

skis

User: Pasi

Aspect 1: Content

1. Content

2. Time3. Location

4. Network

Last skiing of winterDate: 4.4.2010Location: N 62.63 E 29.86Arppentie 5, Joensuu

Date

Not expected in

July

User: Pasi

Aspect 2: Time

1. Content

2. Time

3. Location4. Network

Last skiing of winterDate: 4.4.2010Location: N 62.63 E 29.86Arppentie 5, Joensuu

Exact coordinates

Address forusability

User: Pasi

Aspect 3: Location

1. Content

2. Time

3. Location

4. Network

User: Pasi

Relevance of data is defined by social or other network

Aspect 4: Network

MOPSI Description: Picasa Flickr All Real

Places --- 28% 21% 32% Events and action 31% 17% 5% 7% People 6% 7% 6% 10% Objects --- 5% 8% 12% Architect & Nature 25% 21% 23% 37% Animals --- 3% 2% 2% Other 20% 16% --- 0% Garbage 19% 2% 35% ---

Data Collection in MOPSI System

Content: Description:

Urban 121 People 68 Nature 54 Events 13 Documents 13 Animals 11 Others 25

Office & Computers 196 Other test photos 153 Failures 155

Places 36 Events and action 24 People 21 Objects 20 Architecture and nature 11 Animals 5

Garbage 228 None 464

Photos by categories in MOPSI

Content descriptionSingapore flier (Going to) sauna

(no words needed) (no words needed)

Description of pictures of people

• People by their name or role:- Runner

- Floorball player

• Related to place:- Untung / STMIK

- Young Andrei

- My son Amir

• Among the pictures of people, 31% (21/68) has some kind of identity.

Description of events

• Content or location not enough.

• Description adds to the relevance.

• Examples:- Work: ecse, abi, mopsi meeting, ubiikki- Running competition: Åland half marathon- Actions attached with feelings:

quality time in skiing elevator.

Location of travel photos

• Not easily recognized from content.• Can be concluded from GPS data.• Descriptions are used anyway:

- Locations as such: Clarke Quay, Geger beach, Suceva, Tahkovuori and Aholansaari (location

- With additional details: Petronas Towers, Heureka, Singapore flier, Olavin linna.

- With additional feelings: Musta Pekka mutkan takana (Black Pete behind the curve)

MOPSI Description: Picasa Flickr All Real

Places --- 28% 10% 31% Events and action 31% 17% 7% 21% People 6% 7% 6% 18% Objects --- 5% 6% 17% Architecture and nature 25% 21% 3% 9% Animals --- 3% 1% 4% Others 20% 16% --- 0% Garbage 19% 2% 66% ---

Comparison with Picasa and Flickr

Photo distribution in MOPSI

Phone: Accuracy:

Nokia 6110n 2.73 Nokia N95 (slider open) 3.13 Pretec external GPS 3.61 Garmin Forerunner 3.69 Nokia E72 3.76 Nokia E66 5.10 Nokia N-95 (slider closed) 6.05 Fortuna external GPS 6.44

Accuracy of mobile GPS

Technical problemsAsynchronous problem (1) Asynchronous problem (2)

Low illumination Interrupted transmission

Thank you

Time for Time for questions!questions!