1. A managing device for managing data of a result of image capturing, comprising: the image capturing being performed by an image capturing device so as to capture a print pattern, provided onto a printed material, and the data of the result of the image capturing indicates the result of the image capturing and is sent from the image capturing device to the managing device, the print pattern being constituted by one or more symbols and being associated with information on a predetermined control of a print process on a print processing device, the managing device comprising: pattern extracting means for extracting image data for the print pattern from the data of the result of the image capturing sent from the image capturing device, and calculating at least one of a density, hue, and width of lines of the print pattern; obtaining means for obtaining, from a storage device, (i) first output pattern data that is data for use in printing the print pattern, and (ii) reference pattern data that is used to identify the print pattern from the data of the result of image capturing performed by the image capturing device to capture the print pattern printed onto the printed material based on the first output pattern data; determining means for determining a matching level between the reference pattern data obtained by the obtaining means and at least one of the density, hue, and width of lines of the print pattern calculated by the pattern extracting means so as to determine whether the matching level is less than a predetermined threshold; and modifying means for modifying at least one of the density, hue, and width of lines of the first output pattern data which is for use in printing the print pattern and is stored in the storage device if the determining means determines that the matching level is less than the predetermined threshold such that the print pattern is printed at a higher density, in a different hue, or with thicker lines.