Many people have shared recently This interesting offer (Confused) with us – visualize the airflow using a so-called “bottom-oriented” smartphone. On a hot summer day, You can see waves in the air – Caused by the change in density of the air as it heats up, and therefore the light is refracted differently. Schlieren photography This is a general set of techniques for visualizing the flow of fluids, but of course it can also be applied to the flow of air. In this case, thanks to some clever tricks of optical recognition, this schlieren method makes it possible to visualize the airflow using only the HD camera of your Android smartphone and a wallpaper printed with a known pattern!
The Scientific article behind this trick It describes how well this method works – it is recommended to check. For a simple explanation, as the background is high contrast and known to the smartphone app, you can magnify the differences between what the camera expects to see and what the camera sees – matrix icons corner data helps your smartphone recognize the position of the background image for more accurate mapping. hot air and cold air flow These are the most visually noticeable, and it’s not clear how much even airflow will be noticeable. but, Code source de l’application Android And the printable template Available for free on GitHub – you can just try this method and see if it works!
It’s an awesome and accessible hack, and we wonder what our fellow hackers can use it for. In a way, it’s a poor man’s thermal camera for airflow! We have covered Réglage du miroir schlieren A few years ago – with a smartphone too. Maybe those ubiquitous HD cameras can be useful for more things than we think!
Create an ally that allows you to see the flow of air with just a smartphone camera. pic.twitter.com/XaQ7lgmVJ1
– kambara (kambara) July 12, 2022
We thank [shinwachi] And an anonymous sender to share this with us!