The present invention aims to provide an eyeglass set that is easy to manufacture and that can be used as a prescription sunglass having excellent designability. The tubing string can be used for staged wellbore fluid treatment where a selected segment of the wellbore is treated, while other segments are sealed off. The second information processing apparatus includes first reception means, computation means, determination means, and second transmission means. The method includes receiving a plurality of pixel offset values in the range of pixel offset values, calculating a gain level value for each of the plurality of pixel offset values, and mapping a gain level value to a pixel offset value.