About
This application uses your iPhone camera to measure water quality parameters like turbidity and suspended particulate matter. It guides you through image capture with a gray card reference and provides detailed analysis and data export.
What's New in HydroColor
2.4
February 3, 2025
Back-end updates to the latest APIs and frameworks.
Developer apps
FAQ
What is HydroColor used for?
HydroColor uses your iPhone camera to measure water quality parameters like turbidity and suspended particulate matter. It provides scientific data on water reflectance, helping users understand water conditions.
Does HydroColor require any special equipment?
Yes, HydroColor requires the use of an 18% photographer's gray card as a reference for accurate measurements. These are widely available at photography shops and online.
What specific water quality metrics can HydroColor measure?
HydroColor can estimate water turbidity in NTU (0-80 NTU), concentration of suspended particulate matter (SPM) in g/m^3, and the backscattering coefficient in the red spectrum.
How does HydroColor ensure accurate measurements?
HydroColor uses your iPhone's GPS, gyroscope, and compass to guide image collection. It also corrects for sky reflection and uses the gray card for illumination normalization, ensuring illumination-independent reflectance measurements.
Can I save and export the data collected by HydroColor?
Yes, data is saved instantly within HydroColor and can be accessed later. You can also download the data to a computer from the documents folder accessible via iTunes, including detailed measurement information.
Is HydroColor available on Android devices?
Based on the provided information, HydroColor is designed for iOS devices, specifically supporting iPhone and iPod. There is no mention of Android compatibility.
How often is HydroColor updated?
The latest version of HydroColor is 2.4, and it was last updated on February 3, 2025. This indicates a recent update, suggesting ongoing development and support.
What is the scientific basis for HydroColor's measurements?
The method used by HydroColor to measure reflectance has been published in the peer-reviewed journal Sensors and is freely available online. This ensures the scientific validity of the app's measurements.
