Patent ID: 7197169

Claim:
A method for detecting a response for a probe zone on a test strip, comprising: providing a test strip having a light color base and a color pattern displayed thereon, said color pattern occurring in response to a tested solution contacting with said test strip and including a plurality of color lines displayed in sequence from a first portion of said test strip to a second portion thereof, the site of a said color line representing a probe zone of said test strip; capturing an image of said test strip; selecting at least one scan line from the image, said scan line being substantially perpendicular to the image of said color lines; setting a pixel position of said scan line having a minimum pixel value corresponding to a first edge of said test strip; and assigning respective pixel positions of said scan line corresponding to said color lines of said test strip by using said pixel position with the minimum pixel value as a reference and in accordance with the sequence of said color lines displayed on said test strip, thereby a response of a probe zone of said test strip related to a respective pixel value of one said pixel position corresponding to one said color line is obtained.