To project images of lost public art onto the surface it originally occupied. The projection mechanism of display would allow for display of art from other locations as well.

Underlying issue

The city of Venice is rich with public displays of art. Over the years, some of this has been lost, destroyed, damaged or stolen. This is an effort to restore some of what was lost.



The image of the art would be projected onto or near the original surface the art occupied.

Technical Challenges

  • Competing with sunlight
  • Getting power to device(s)
  • Getting data to device(s)

Logistical Challenges

  • Permission to project on the surface
  • Permission and location to place equipment

To be seen in daylight, the projector must be bright enough. Direct sunlight, with no clouds has an illuminance of around 100,000 lux. With clouds and other obstructions in the sky to filter and reduce the light, the luninance of daylight is reduced to around 5,000 to 10,000 lux. The unit lux is lumens per square meter. Lux takes into account the area to be illuminated. If 1,000 lumens were focused onto one square meter, that square meter would be lit with an illuminance of 1,000 lux. The same 1,000 lumens spread over 10 square meters would light the space with 100 lux. Recommended lumen rating for a projector to be used in a room with sunlight is at least 2,000 lumens. This should be the minimum lumen rating for a projector if it is intended to be visible during the day. The other side to consider is that 2,000 lumens will be very bright at night, so a projector with variable brightness may be desired.

Indoor Implementation

Implementing this indoors changes things somewhat. An indoor location takes the art out of context as far as where it used to be. This could be compensated for with one larger image that includes some surroundings, multiple projections to show more of the surrounding area, or a small map in one corner of the image to show where it used to be. There could be multiple of these set-ups for different pieces of art, or have just one that cycles through various locations. The indoor venue could provide power outlets and places to put computers to control these images. Being inside would also allow for more tolerance of projector brightness (or lack thereof).

Here are a few samples of available projectors that would be well suited to applications in either venue, but would easier to implement indoors due to lack of self contained input mechanisms. Projectors listed in the X-ray page could also be used for an indoor implementation.

Model Cost Lumens Dimensions Features / Comments
Canon REALiS SX7 1 5,200 4000 (inches)(HxWxD):
4.5 x 10.6 x 13.2
Can project an image from up to 16',* Built in speakers, 1600x1200 Max resolution, 2000 hour lamp life, 1000:1 contrast ratio
InFocus IN10 2 1,249 1800 (inches)(HxWxD):
2.5 x 7.8 x 6.1
Can project from up to 16',* Built in speakers, 1280x1026 Max resolution, 4000 hour lamp life, 1100:1 contrast ratio
Epson PowerLite Home Cinema 720 3 1,299 1600 (inches)(HxWxD):
4.9 x 16.0 x 12.2
Can project from up to 22',* No speaker, 1280x720 Max resolution, 3000 hour lamp life, 10000:1 contrast ratio
Product Links
1 [http://www.projectorcentral.com/Canon-REALiS_SX7.htm]
2 [http://www.projectorcentral.com/InFocus-IN10.htm]
3 [http://www.projectorcentral.com/Epson-PowerLite_Home_Cinema_720.htm]

* Brightness diminishes with distance

Interactive Possibilities

There could be a screen or other interface to allow visitors to choose what is displayed. Choices could include specific pieces of art, areas where the art used to be, or maybe a "grab bag" sort of item where a randomly chosen piece of art would be displayed. If the display was implemented on a small scale, large enough for only a few people at a time with displays reaching around the viewer, "head tracking" could be implemented. Head tracking, as shown in the videos on Johnny Lee's website, would require the viewer to wear a headset of some sort. With some more detailed and complete footage of the areas where the art was, this would allow the viewer a very realistic and involving experience. This would require a small scale display, because the effect of head tracking only works for the person wearing the headset.
With or without the head tracking, a real or animated areal "fly to" type of transition, similar to what Google Earth does, would add an interesting touch to the transitions. This would require some areal footage or possibly use Google Earth or some part of it for the location transitions. Using Google Earth may involve acquiring some permissions for this type of use, but this could be easier than creating/acquiring the footage ourselves.


Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License