| 摘要 |
[Aim] To obtain an immunochromatographic assay method that can accurately measure a color-developed state by a reagent. [Solution Means] In an immunochromatographic assay method for performing an assay related to a specimen by reacting a reagent held by a carrier and the specimen with each other, and by obtaining an image signal by imaging a reagent portion by a camera (42), and by measuring, based on the image signal, the color-developed state of the reagent, a morphological opening operation is applied to the image signal by using a structuring element the size of which is less than or equal to a signal change width of the reagent portion that has developed color, and a morphological opening operation is applied to the image signal by using a structuring element the size of which is larger than the signal change width of the reagent portion that has developed color. The color-developed state is measured based on a difference signal obtained by performing a subtraction between the image signals to which the opening operations have been applied respectively. |
