Feature quantity extracting method, the object classification method, the object identification method, the feature amount extraction device, object classification system, a subject judging unit, a feature extraction and subject classification and subject determination program and a recording medium recording the program

摘要

From an image obtained by imaging an object, feature extraction methods representing a feature of the subject regardless of the shape of the subject, and provides a classification and discrimination method of an object using the extracted feature quantity. An extracting feature quantity extracting process characteristic quantity from the image of the subject captured by the imaging means, the step of creating a filter bank from the image, a step of creating a maximum brightness image from the filter bank, the maximum brightness Set the image area circle image, and the step of setting the center Cc and the radius Rc of the image area circle, the pixel having the maximum luminance image, between the center Cc (a) to the position of the pixel (x, y) and the distance L _D, the ratio of the radius Rc, (b) the luminance value F _D of the pixel _(x, y), _(c) the sum of the difference of the luminance values ​​of the neighboring pixels, and is projected to the three-dimensional space in the axial a step of, by including the step of creating a frequency histogram from a pixel projected on the three-dimensional space, and extracts a feature quantity from an image obtained by imaging a subject.