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US 12,461,038 B2Granted
Systems and methods for device-independent color measurements for colorimetric sensing
AssigneeMozarc Medical US LLC
InventorsShawn C. Kelley, Michael N Missaghi, Sumaya M Abdullahi, Subin Sebastian
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Abstract
A calibration method and related systems for colorimetric chemical assay and a fluid sensor apparatus using the same are provided. Reference measurements are taken from both a digital camera and a spectrometer. The digital camera is installed in the fluid sensor apparatus. Subsequently, color measurements from the digital camera are then converted and compared to prior spectrometric measurements to perform a colorimetric analysis.
Claims9
A method for calibrating a digital camera for use in a dialysis system, comprising the steps of:
- providing:
- the dialysis system including a fluid sensor apparatus;
- and
- the digital camera to be calibrated for use in the dialysis system, wherein the digital camera is configured to receive light projected through the fluid sensor apparatus, when installed to the fluid sensor apparatus;
- determining fit parameters for a characteristic equation that inputs a set of two or more image color values associated with a captured image element and outputs a spectral color value, wherein the fit parameters are based on:
- images taken at a plurality of different exposure times by the digital camera of each of a plurality of light sources, a set of image color values for each of two or more colors associated with elements in each captured image, and one or more spectral color values associated with each of the plurality of light sources obtained from spectrometer measurements;
- and
- calibrating the digital camera when used in the dialysis system, wherein the calibration is based on at least the determined fit parameters and the characteristic equation.
5 more elements
Dependencies are inferred from the claim text.