Focus-stacking with Raspberry Pi for macro photography #piday #raspberrypi @Raspberry_Pi
Another really great RasPi photography project from Dave Hunt, via RaspberryPi.org:
Dave Hunt is on a bit of a roll at the moment. Not content with having engineered the water droplet photography setup behind the prettiest post we’ve featured here, he’s also been working with the Pi and an home-made macro rail for sharper macro photographs without all that woolly depth of field. Bokeh – the fuzzy blur from the out-of-focus parts of a picture – is an effect that can be really beautiful, but sometimes you want a sharper picture, which can be nigh-on impossible in macro photography without special equipment.
There’s a way professional photographers deal with this, but, of course, it’s expensive. You can buy a rig which allows you to take many images, each taken a little closer to the object, so different parts of it are in focus with each picture. You can then combine or stack all those images in software, as in the cow picture on the right. There’s an open software solution to the matching and stacking problem called CombineZ (somebody port this thing to the Pi; that GPU is built for just this sort of application), but if you want to buy a rail that automates the moving of your camera, things suddenly start to look expensive. Dave says commercial solutions come in at around $600.
Enter the $35 Raspberry Pi and an old flat-bed scanner from the loft….
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.