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Aerial drones may find use as smart photographic light sources

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July 12, 2014

A light-equipped UAV moves to maintain the desired lighting on the model

A light-equipped UAV moves to maintain the desired lighting on the model

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As any professional photographer knows, setting up lights can be a hassle. This is often the case in the studio, but especially when shooting on location. Before too long, however, it may be possible to use hovering autonomous drones as light sources. In fact, that's just what a team from MIT and Cornell University has already done. Their system not only does away with light stands, but the light-equipped aircraft automatically moves to compensate for movements of the model or photographer.

In a demo of the system, the researchers used a Parrot AR.Drone quadcopter to create rim lighting, an effect in which only one edge of the subject is strongly lit. The drone was equipped with a continuously-shining halogen light, a photographic flash, and a Lidar (Light Detection and Ranging) unit. It was also communicating with an external computer.

The drone was equipped with a continuously-shining halogen light, a photographic flash, an...

The photographer's camera, meanwhile, was linked to that same computer, sending signals to it 20 times a second. A program analyzed the images, and monitored the width of the brightly-lit area along the edge of the subject.

To start, the photographer indicated the direction from which they wanted the light to come. The copter responded by proceeding to that side of the subject. The photographer then indicated how wide they wished the brightly lit rim to be, as a percentage of the total lit area of the subject. This caused the copter to adjust its position, in order to create that effect.

When the subject or photographer moved, however, it would cause that width (and thus percentage) to change. Using an algorithm that was constantly assessing the image from the camera, the drone was able to compensate for those movements, restoring the lit area to its desired width.

Rim lighting is particularly tricky, so producing more conventional lighting should presumably be easier. Likewise, for stationary subjects, the ability to compensate for movements won't be a crucial feature.

The system was developed by Manohar Srikanth when he was an MIT grad student, along with MIT's Prof. Frédo Durand and Cornell's Kavita Bala. It will be presented in August, at the International Symposium on Computational Aesthetics in Graphics, Visualization, and Imaging.

Source: MIT

About the Author
Ben Coxworth An experienced freelance writer, videographer and television producer, Ben's interest in all forms of innovation is particularly fanatical when it comes to human-powered transportation, film-making gear, environmentally-friendly technologies and anything that's designed to go underwater. He lives in Edmonton, Alberta, where he spends a lot of time going over the handlebars of his mountain bike, hanging out in off-leash parks, and wishing the Pacific Ocean wasn't so far away.   All articles by Ben Coxworth
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3 Comments

It's cool, but until we have light weight protective cages we can put around our little flying buddies, or at least their props, the shoot will be tense.

Dan Lewis
14th July, 2014 @ 10:29 am PDT

$26 will buy a remote control helicopter with a cage around the rotors. It's not big enough to lift photography lights, but shipping is free.

The next step will be photographers using these drones for cameras as well as lights, for location shoots.

theotherwill
14th July, 2014 @ 03:52 pm PDT

Professional studio lights have variable output modeling lights built in. These are generally powered from mains and in a very few instances by very heavy battery paks for location shooting. The output of the flash also changes in proportion to the modeling light. This is required to get the lighting just right. I wonder what kind of batteries this gizmo can carry that will permit this on any kind of extended shoot ! Or this may just be a change the battery after every shot kind of devce!

pmshah
14th July, 2014 @ 07:00 pm PDT
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