A system for monitoring an analyte concentration in liquid is provided. The system includes a coupon comprising an absorbent body with a window through the absorbent body wherein the liquid is maintained in said window by capillary action and surface tension. A reactant is in the absorbent body wherein the reactant is capable of diffusing into the window to react with an analyte in the liquid, or the reactant is able to react with the analyte within the coupon itself, with color-indicating by-products of the reaction diffusing into the window, wherein the analyte is present in an analyte concentration, to form a reactant with a color wherein the color has an intensity which correlates to the analyte concentration. A light source is provided which is capable of passing light into the window wherein the light is attenuated by the color proportional to the analyte concentration to form attenuated light. A detector is provided which is capable measuring an intensity of the attenuated light. Alternatively, the color change can be read by eye and compared to a color chart relating the color to an analyte concentration.

A textile wash cycle indicator system comprising a textile fiber or yarn or section comprising a dye system comprising at least one dye, the dye system configured to release an amount of the at least one dye during each consecutive wash cycle; wherein the release of the amount of the at least one dye correlates with the consecutive wash cycles, and a method of using same.

A method of image processing includes receiving a first image of human skin. The first image corresponds to a first, uniform broadband illumination condition. The method also includes receiving a second image which has the same field of view and contents as the first image. The second image corresponds to a second illumination condition which comprises a uniform narrowband illumination condition. The method also includes processing the first and second images to fit parameter maps for a spectral bidirectional scattering surface reflectance distribution function skin model. The parameter maps include a modelled melanin concentration, a modelled haemoglobin concentration, a modelled melanin blend-type fraction and a modelled epidermal haemoglobin fraction. At least three of the parameter maps are independent.

A system for monitoring an analyte concentration in liquid is provided. The system includes a coupon comprising an absorbent body with a window through the absorbent body wherein the liquid is maintained in said window by capillary action and surface tension. A reactant is in the absorbent body wherein the reactant is capable of diffusing into the window to react with an analyte in the liquid, or the reactant is able to react with the analyte within the coupon itself, with color-indicating by-products of the reaction diffusing into the window, wherein the analyte is present in an analyte concentration, to form a reactant with a color wherein the color has an intensity which correlates to the analyte concentration. A light source is provided which is capable of passing light into the window wherein the light is attenuated by the color proportional to the analyte concentration to form attenuated light. A detector is provided which is capable measuring an intensity of the attenuated light. Alternatively, the color change can be read by eye and compared to a color chart relating the color to an analyte concentration.

A method of image processing includes receiving a first image of human skin. The first image corresponds to a first, uniform broadband illumination condition. The method also includes receiving a second image which has the same field of view and contents as the first image. The second image corresponds to a second illumination condition which comprises a uniform narrowband illumination condition. The method also includes processing the first and second images to fit parameter maps for a spectral bidirectional scattering surface reflectance distribution function skin model. The parameter maps include a modelled melanin concentration, a modelled haemoglobin concentration, a modelled melanin blend-type fraction and a modelled epidermal haemoglobin fraction. At least three of the parameter maps are independent.

A method includes: disposing a light-transmissive container containing a target solution in which a reagent is added to a solution of a peracetic acid formulation side by side with a plurality of color samples, wherein the peracetic acid formulation being for food use, and the concentration of the peracetic acid formulation being 50 mg/L to 500 mg/L, and visually identifying transmitted light transmitted through the container and any one of the plurality of color samples so that the concentration of the peracetic acid formulation contained in the target solution is determined, wherein each of the plurality of color samples exhibits a color corresponding to each of a plurality of the target solutions containing solutions of the peracetic acid formulation of mutually different concentrations, and the plurality of target solutions corresponding to the color samples exhibit an absorbance of 1.5 to light in wavelength ranges different from each other.

A method according to an embodiment of the present invention includes acquiring an image of a urine test kit equipped with a biochemical sample rod including a plurality of pad cells including a plurality of sub-pad cells, extracting at least one potential RGB value from the image by means of a potential color extractor, and converting and analyzing the at least one potential RGB value using a plurality of color spaces included in a color space conversion engine and a color space analysis engine by means of an analyzing unit. The plurality of color spaces are randomly generated, and a color space having a smallest distance value from the potential RGB value is determined as an optimal color space.

A system for monitoring an analyte concentration in liquid is provided. The system includes a coupon comprising an absorbent body with a window through the absorbent body wherein the liquid is maintained in said window by capillary action and surface tension. A reactant is in the absorbent body wherein the reactant is capable of diffusing into the window to react with an analyte in the liquid, or the reactant is able to react with the analyte within the coupon itself, with color-indicating by-products of the reaction diffusing into the window, wherein the analyte is present in an analyte concentration, to form a reactant with a color wherein the color has an intensity which correlates to the analyte concentration. A light source is provided which is capable of passing light into the window wherein the light is attenuated by the color proportional to the analyte concentration to form attenuated light. A detector is provided which is capable measuring an intensity of the attenuated light. Alternatively, the color change can be read by eye and compared to a color chart relating the color to an analyte concentration.

A method for identifying a dry salt flat based on the sentinel-1 data is provided. The method includes: carrying out field survey and acquiring data; processing sentinel-1 data; determining backscattering values, spectrum characteristics and colors of different polarization; and determining a classification criterion and carrying out threshold classification.

A beverage dispenser includes a nozzle to dispense a beverage. The beverage dispenser further includes a camera to capture an image of the beverage as the beverage is dispensed from the nozzle. The camera has a field of view that includes the beverage. The beverage dispenser further includes a light source that illuminates the field of view of the camera. The beverage dispenser further includes a computer. The computer analyzes the image of the beverage and determines a characteristic of the beverage.