PiShot allows capturing high-speed strobe images using the Raspberry Pi v1 Camera. Specifically, it allows the v1 camera to operate in an open shutter mode without a rolling shutter, and allows for precise syncing of multiple Pi's.
The project is still under active development.
Enable the camera using sudo raspiconfig. Make sure that you can take an image
using raspistill -o test.jpeg.
Then,
sudo apt-get install wiringpi
Add dtparam=i2c_vc=on and the end of /boot/config.txt and i2c-dev to
/etc/modules-load.d/modules.conf.
Then reboot.
Build the project,
make all
And then run it,
sudo python pishot.py --one -t 10
This will take a 10 second exposure and save all the frames to temp.264.
Note: The auto white balance makes the initial images really sad. Just wait for a minute before firing the strobe to get a better colored image.
Multiple Pi's can be daisy changed to open and close shutters at the same time. All slave Pi's run,
sudo python pishot.py --slave
And the master Pi runs,
sudo python pishot.py --master
The Pi's must be chained as follows, (all the grounds must be tied together)
Master Pi's 23 --> Slave 1's 17
Slave 1's 23 --> Slave 2's 17
Slave n's 23 --> Slave (n+1)'s 17
.
.
.
Then, in the Master's prompt,
>> o
will open the shutter and,
>> c
will close the shutter.
This work was done in collaboration with Varun Mangalick, Kristin Sheridan and Candace Okumko.
Copyright (c) 2019 Shreyas Kapur. Released under MIT License.