Corresponding image processing method for compensating colour

A corresponding image processing method comprising:

• a first step for searching for a corresponding point between a target image and a corresponding image;
• a second step for performing radiometric calibration such that a camera response function of the corresponding image has a linear function;
• a third step for compensating for a color of the corresponding image by calculating a color conversion matrix;
• and
• a fourth step for measuring similarity between the target image and the corresponding image,
• wherein the first step comprises:
• detecting features using a feature detecting method based on a corner point;
• deriving first matching points N by matching the features;
• deriving second matching points M by removing outlier in the first matching points N;
• and
• determining suitability of the feature detection, and
• wherein the determining the suitability of the feature detection comprises:
• when a number of the second matching points M is divided by a number of the first matching points N and a quotient falls below 0.7, re-detecting the features using a feature detecting method based on invariant features;
• and
• matching the features and re-deriving second matching points M2 by removing outlier.