Abstract: A method for conducting a urinalysis is provided. The method includes receiving an image of a urine strip having a plurality of reacting areas configured to react with a predetermined urine parameter, and a plurality of reference regions each having a designated color; extracting, from each reference region, reference values representative of a detected color in the reference region; extracting, from each reacting area, color values representative of a detected color of the reacting area; conducting a regression analysis by determining least-squares of the reference values in accordance with prestored set of values corresponding to expected colors of each reference region; determining a color correction model by calculating root polynomial expansion of the least-squares; applying the color correction model on the color values by calculating root polynomial expansion of the color values to obtain normalized values; and determine level of the urine parameters in accordance with normalized values.