1. An information processing device comprising: one or more processors operable to: perform conversion such that an area including a feature point and the periphery thereof in a specific target included in an image is set as a first area and, when one pixel included in the first area is set as a reference pixel, an area including the reference pixel and pixels in the periphery thereof is set as a second area, and, based on a comparison result of the feature amount of the reference pixel and the feature amount of another pixel included in the second area relating to the reference pixel, the feature amount of another pixel is converted for each pixel included in the second area, wherein each pixel included in the first area is set as the reference pixel, and wherein a plurality of second areas are set with each second area in the plurality of second areas including the corresponding reference pixel and the corresponding pixels in the periphery thereof for each pixel included in the first area; and calculate a feature amount to be used in an identification process for identifying the specific target by performing addition of the value of each pixel included in one of the plurality of second areas and the value of each corresponding pixel included in others of the plurality of second areas.