Method and system for automated visual analysis of a dipstick using standard user equipment
First Claim
1. A method comprising:
- capturing, using a capturing device of a mobile device, a captured image containing;
a dipstick having colored test reagents, and a color board comprising a grid of grey patches and a plurality of sets of reference color patches, said reference color patches reflecting variations in one of;
illumination conditions, capturing capabilities of potential mobile devices, and response functions of capturing devices of the potential mobile devices, wherein each of the sets of reference color patches is tailored to span a color gamut of a respective one of said colored test reagents;
deriving, based on the plurality of sets of reference color patches and the grid of grey patches on the captured image, local illumination parameters associated with the colored test reagents and the plurality of sets of reference color patches;
normalizing local illumination of the captured image, based on the local illumination parameters; and
interpreting the colored test reagents, based on the normalized local illumination and the reference color patches, in the captured image.
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Abstract
A method for analyzing a dipstick using a smartphone is provided herein. The method includes: capturing an image containing: a dipstick having colored test reagents, and a color board having a grid of grey patches and a plurality of reference color patches; deriving, based on the grid, local illumination parameters associated with the colored test reagents and the plurality of reference color patches; determining whether illumination parameters are sufficient for interpreting the colored test reagent; in a case the illumination parameters are insufficient, notifying a user that an interpretation of the colored test reagents is not possible, otherwise, applying one or more image enhancement operation to the captured image, based on an analysis of the grid of grey patches, to yield enhanced reference color patches; and interpreting the one or more colored test reagents, by projecting the colored test reagents onto a vector of the enhanced reference color patches.
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Citations
20 Claims
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1. A method comprising:
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capturing, using a capturing device of a mobile device, a captured image containing;
a dipstick having colored test reagents, and a color board comprising a grid of grey patches and a plurality of sets of reference color patches, said reference color patches reflecting variations in one of;
illumination conditions, capturing capabilities of potential mobile devices, and response functions of capturing devices of the potential mobile devices, wherein each of the sets of reference color patches is tailored to span a color gamut of a respective one of said colored test reagents;deriving, based on the plurality of sets of reference color patches and the grid of grey patches on the captured image, local illumination parameters associated with the colored test reagents and the plurality of sets of reference color patches; normalizing local illumination of the captured image, based on the local illumination parameters; and interpreting the colored test reagents, based on the normalized local illumination and the reference color patches, in the captured image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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a mobile device having specified image capturing and processing capabilities, configured to capture an image containing a dipstick having colored test reagents, and a color board comprising a grid of grey patches and a plurality of sets of reference color patches, said reference color patches reflecting variations in one of;
illumination conditions, capturing capabilities of potential mobile devices, and response functions of capturing devices of the potential mobile devices, wherein each of the sets of reference color patches is tailored to span a color gamut of a respective one of said colored test reagents; anda computer processor configured to; derive, based on the plurality of sets of reference color patches and the grid of grey patches on the captured image, local illumination parameters associated with the colored test reagents and the plurality of sets of reference color patches; normalize local illumination of the captured image, based on the local illumination parameters; and interpret the colored test reagents, based on the normalized local illumination and the reference color patches, in the captured image. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification