ColourWorker
Spectral measurement on phones
Free · Designed for iPad
In general it is not possible to make accurate colorimetric and spectral measurements in conventional photographic images for two main reasons. First because variation in illumination spectra cannot be discounted, and second because the number of degrees of freedom in reflectance spectra is potentially much greater than the three provided by camera RGB signals. Consequently, colorimetry requires either spectrometers or multi- and hyper-spectral imaging, which are costly and inconvenient. ColourWorker uses automatic calibration and statistical modelling to improve the accuracy of color measurement in photographic images. This app implements ColourWorker technology on iOS. It allows users to select application areas, to take a photograph with a calibration standard, and returns estimated an average L*a*b* colorimetric value and for pixels in a defined region of the image along with a plot of the reflectance spectrum.
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This version uses a 1-1-3-1-1 QR pattern for the colour standard.
The developer, Miguel Garvie, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Miguel Garvie
- Size
- 10.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.2 or later.
- iPhone
Requires iOS 13.2 or later. - iPad
Requires iPadOS 13.2 or later. - iPod touch
Requires iOS 13.2 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2024 ColourWorker