Measuring method and apparatus using color images
AssigneeOMRON Corporation
InventorsJun Kuriyama, Masato Ishiba, Kiyoshi Murakami
Life of this patent
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Abstract
A method for correcting a color captured by a detector using a light source includes determining target reference color values corresponding to a plurality of groups each of which includes at least three reference colors; determining detected reference color values corresponding to the plurality of groups by capturing the emitted reference colors using the detector; calculating a plurality of sets of correction factors; and correcting the detected color value or the target color value to generate a corrected color value based on one of the sets of the correction factors.
Claims10
A method for correcting a color captured by a detector using a light source comprising:
- determining target reference color values corresponding to a plurality of groups each of which includes at least three reference colors;
- emitting the reference colors corresponding to the target reference color values by the light source;
- determining detected reference color values corresponding to the plurality of groups by capturing the emitted reference colors using the detector;
- calculating a plurality of sets of correction factors, each set of which maps relationships between the detected reference color values of each of the groups, and the target reference color values of each of the groups;
- by using the detector, determining a detected color value corresponding to a target point which is subsequently measured with respect to a target color value;
- and
- correcting the detected color value or the target color value to generate a corrected color value based on one of the sets of the correction factors.
An apparatus for correcting a color captured by a detector using a light source comprising:
- means for determining target reference color values corresponding to a plurality of groups each of which includes at least three reference colors;
- means for emitting the reference colors corresponding to the target reference color values by the light source;
- means for determining detected reference color values corresponding to the plurality of groups by capturing the emitted reference colors using the detector;
- means for calculating a plurality of sets of correction factors, each set of which maps relationships between the detected reference color values of each of the groups, and the target reference color values of each of the groups;
- means for, by using the detector, determining a detected color value corresponding to a target point which is subsequently measured with respect to a target color value;
- and
- means for correcting the detected color value or the target color value to generate a corrected color value based on one of the sets of the correction factors.
Dependencies are inferred from the claim text.