StereoPi

by StereoPi

An open source stereoscopic camera based on Raspberry Pi

View all updates Oct 09, 2020

How to Synchronize Multiple StereoPi?

by Eugene Pomazov

Why?

You may ask, "Why do I need to use multiple StereoPi at once?"

Well, we got a set of requests from some customers who needed to take a lot of images at once. One of the most popular use cases is the creation of animated "3D" GIFs. These images are created using a set of images (usually 4). In our article we are describing all processes, starting from capturing files and up to creating MP4 video files. So you can post it as a video, or use a video->gif converter to get an animated image.

The second popular use case is a 3D reconstruction, using a set of cameras. For example, through the use of Multi-View 3D Digital Image Correlation (Multi-DIC), a technique recently published by Dr Dana Solav and Dr Kevin Moerman.

DIC allows the researchers to capture both the 3D shape and the 3D deformation of the objects imaged. Their application is imaging of the lower limb with the aim of automated design of prosthetic devices.

Their initial work featured a circular array of 12 Raspberry pi systems with cameras. However, true synchronous imaging and triggering of the separate cameras proved very challenging, and the lack of proper triggering is limiting the application to relatively slow movements.

Since StereoPi systems can naturally acquire images simultaneously from two cameras, Dr. Kevin Moerman is now exploring the use of this simple StereoPi setup for 2-camera DIC:

Through the use of the StereoPi system they can now achieve synchronized imaging and simplify their set-up significantly. The two camera DIC setup will enable low cost deformation and strain imaging, e.g. for imaging tensile testing of materials. You can find more details in Dr. Kevin Moerman’s post on our forum here. In the future they aim to use a circular set-up featuring multiple StereoPi systems to achieve full 360 degree shape and deformation imaging, and will require simultaneous triggering.

How?

If you are interested in this synchronization approach, you can find our detailed how-to guide here on our blog.

Stay tuned and happy making!

About the Author

Eugene Pomazov

StereoPi  ·  Realizator  ·   St. Petersburg


$106,198 raised

of $35,000 goal

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Product Choices

$35

StereoPi AnyCase Kit

With AnyCase Kit you can get your setup in a 10 minutes, before you go to your 3D printer or laser cut machine! You can assemble any case with 25, 65, 120 or 200 mm stereobase, or for 360 degree video with just a screwdriver! And you have 12 more camera ribbons now, do not afraid to bend you cables in your bold experiments!


$79

StereoPi Slim Edition

Perfect for DIY ninjas and those wanting to embed StereoPi in a tight space. This board is the same as the standard edition, but without all the bulky connectors - the Ethernet RJ45 jack, GPIO header, and dual USB Type-A connector have not been populated. To use this board, you will need your own Raspberry Pi Compute Module, cameras, and camera ribbon cables. Two short power cables already included.


$99

StereoPi Standard Edition

The world of stereoscopic video awaits! This board is the ultimate interface between two cameras and a Raspberry Pi Compute Module. It comes with all the bells and whistles, including Ethernet, dual USB ports, GPIO header, microSD slot, HDMI output, and more. To use this board, you will need your own Raspberry Pi Compute Module, cameras, and camera ribbon cables. Two short power cables already included.


$139

StereoPi Starter Kit

This kit has everything you need to get started right away. The kit includes one StereoPi Standard Edition board, two V1 cameras (w/ ~20 cm ribbon cables), one Raspberry Pi Compute Module 3 + Lite, and everything in the StereoPi Accessories Kit (two short ribbon cables, one USB power cable, two power cables, one V1/V2 dual-camera mounting plate, and one wide-angle dual-camera mounting plate). We've also included a microSD card pre-imaged with Raspbian and all the stereoscopic video and image demos you see on this project page.


$214

StereoPi Deluxe Kit

This kit includes everything in the StereoPi Starter Kit and adds two wide-angle (160°) cameras (w/ ~20 cm ribbon cables). With this kit, you'll be able to run all of the demos shown on this project page and start experimenting on your own. You will reign supreme over your stereoscopic domain.

Credits

StereoPi

We are a small team of geeks who have been making remote-controlled things with livestreaming video since 2010. We've done everything from boats and planes, to robots, copters, and VR helmets. If we can't find the right tools for our projects, we build them ourselves.


Eugene

Sergey Serov

Kirill Shiryaev


NexPCB

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