JOSM/Plugins/VideoMapping
From OpenStreetMap Wiki
Contents |
JOSM video mapping plugin
The video mapping plugin should allow users to link a video against a recorded GPS track. It will be designed for multiscreen systems for a quick see&add workflow.
- playback multiple videos within JOSM
- control playback with shortcuts
- link videos against GPS track -> jump to video time
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Started at the "GIS Projekt" at the cair of Geodäsie und Geoinformatik at the university of rostock it became the topic of my bachelor thesis. |
- started: April 2010
- released: July 2011
- current: 0.6b (testing, deploying)
- progress: /Design, /Concept, /history, /history2)
Sponsorship
My research had been kindly supported by test samples of the following companies
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ELMO cooperation lend a SUV Cam II helmet camera |
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Kodak GmbH lend a Kodak Zi8 Pocket Camcorder |
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Rollei] with a Movieline P3 |
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Medion with a P47350 |
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Cisco with a Flip Ultra HD |
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Aiptek with a PocketDV T8, a AHD A100 and a PenCam Trio HD |
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Blickvang with a GoPro HD Hero 960 helmet camera |
| Stadtrundfahrten Rostock |
And of couse by the OSM community [1], [2]
Roadmap
Have a look at the /history2, /history Development:
V 0.1 min JOSM Plugin with interaction on JOSM layer (see GPSracer Plugin for ideas)- V 0.2 video functionality in JAVA
- V 0.3 GPS interaction
- V 0.4 sync video<->GPS track
- V 0.5 advanced comfort (shortcuts, options, UI improvements...)
- V 0.6 multiple videos and gps track interpolation (stage 2 bachelor thesis)
- ... (further extensions /Design#ideas)
- V 0.9 adding vehicle physics and estimating view angle?
- V 1.0 adding OCR functionality to recognize housenumbers, traffic signs,....?
Problems
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register for GPS track layer - create video window, player, controls
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follow/interpolate position in main view -
register shortcuts for video control - better JOSM integration (context menu, deployment)
- stability
Video framework
Cause Java has no good video engine I use the brilliant native library by the VideoLan Project (GPL, Credits). To make it accessible within Java I use the VLCj library provided by Eduardo Sherington (aka William Mark Lee) that comes under GPL, too.
Test recordings
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This page just contains my personal experiences. Please refer Video mapping article instead. |
Camcorders
Mini DV PMDV80 (cheap Keycam)
Kodak Zi8 (Pocket camcorder)
Sony HDR-XR500VE (full hand camcorder)
Movieline P3
HD Hero 960 (helmet cam)
Camcorder setups
bike
car
doube size bus
tram back
rapid transit
helmet camera
walking
- 5km/h
- need a steady cam tripod for >15min (big camcorders becomes heavy over the time...)
- with jumping/slowmo very comfortable
walking, cam in hand
cycling
- 15-30km/h
- easy wearables: tripod+knapsack
- only carrying in hand is possible but not recommend for own security!
looking to side
backward angeled
in hand
car
- very nice within city 30-50km/h
- hidden objects by transporters, trucks, buses, trams,... if you film the opposite lane
- countryside only a few objects
30km/h angled
50km/h angled
70km/h front countryside
bus
- 30-70km/h AVG 25km/h
- heavy acceleration/turns -> mount tripod
- heavy vibrations possible
- have to take a good place esp. in front
- 2nd floor avoids hidden objects
angeled to side
angeled to front
tram
- very fast 30-40km/h -> deinterlacing/artifacts
- looking to the side doesn't work
- even big lettered shops unreadable
- tripod not necessary
- no interaction necessary
backward:
- traffic signs not recognizable
- small shops unreadable
- to much rails
- only very few hidden objects by other trams
angular:
- zoom might get better results cause less speed
backward
backward to the side
rapid transit(sBahn)
- ~80km/h
- very poor results: only big houses/signs identifiable
- mostly surrounded by green
rapid transit 40km/h
rapid transit 50km/h
rapid transit 100km/h
train
- 130km/h
- only ways parallel to the rails visible
- areas surrounding the train stations good visible
UAV
- produce mostly photos that are stitched together
Cameras
- price from 30€(webcam) over 120€(pocket camcorder), 500€(amateur camcorder), 1000€(adv. camcorder) till x000€(prof. TV camera)
- industry cams? (outdoor mount)
- Video suites suck
Sony HDR-XR500VE
- embedded HDD and GPS
- HD is realy great
Panasonic NVS-GS300
- DV tapes suck, cause you have to stream it to PC
- 60-120mins
ELMO SUV II Helmet camera
- 1.50m cable
- has manual focus
- can slow down FPS
- powerfull-> you can point to interesting things
- filming to (oppo)side is difficult cause of focus and limited point of view
- filming to front is very cool but might reduce your attention to the rest of the traffic
- better than webcam
- see demovideo: http://vimeo.com/13626453
Kodak Zi8 Pocket Camcorder
- monitor for review -> you can re-adjust
- handy enough to carry it over long time in hand (even on a bike)
- handy enough to take it allways with you
- brilliant HD quality, 60fps possible
- camcorder like very fast brightness adaption
- very inconspicuous (looks like a mobile phone)
- noise in darker scenarios
conclusion
- best results at 10-25km/h and in a city
- faster means more 'in front' looking cam
- film objects that are far away (opposite lane)
- fix focus to infinite
- have only to decide:
- if road+signs are important (then direct in front looking cam)
- or the scenario (then a traversal to left/right)
- be aware of scratched/unclean windows, rain, reflections, flying hairs -> cloudy weather is cool
- be aware of refocusing and misplaced setups ->fix focus is good
- a second person for body cam setup is perfect!
- GPS cams don't necessarily offer a GPS track
- Cams run <2h
- comparable medium quality of digicams/helmet cams
- luxury camcorders (autofocus,...) not necessary
- a lot of data (1.5h -> 4.8GB) -> prefer MPEG4 and non HD
- Analyzing takes ~ 3x recording time (in premapped city areas with high object density)
- privacy is not a problem most faces unrecognizable and movie has a documentation character.
You/other might be filmed during illegal actions (red crossings....).
Yourself will filmed in different ways (reflections,...).
results
- good tool for: road features, road structure, streetnames, shops, high grade details (barriers, benches, clocks,...), high density (housenumbers) and QA in general
- might get problems with some house numbers (bad contrast on the same colored ground etc...)
legal/pricacy issues
- need no permisssion if recording in public transport (see forums, wikipedia:Drehgenehmigung)
