An information processing device for generating a piece of drawing information of a line image drawn by intermittently imparting energy to a chromogenic medium while changing a position to be imparted, the information processing device being operably coupled to a laser irradiation device configured to emit a laser beam for drawing a line image on the chromogenic medium: the information processing device comprising: a shape information storing part configured to store pieces of shape information for respective combinations of a thickness of a line of line images and a line image size of a line images; a thickness information obtaining part configured to obtain a piece of thickness information describing the thickness of the line of the line image; a code information obtaining part configured to obtain a piece of code information describing a character to be drawn in the target line image; a size information obtaining part configured to obtain a piece of size information of the target line image; a shape information selecting part configured to select a piece of shape information out of pieces of shape information for each character based on the piece of thickness information and the piece of size information; and a drawing information generating part configured to read out the piece of shape information selected by the shape information selecting part from the shape information storing part and to generate a piece of drawing information from the piece of shape information, characterized in that the shape information storing part is configured to store a piece of lower limit information including a combination of a line image thickness and a lower limit size of a line image drawn by the line image thickness, and the shape information selecting part is configured to compare a first ratio (Rt) between the lower limit size and the line image thickness in the lower limit information on the one hand and a second ratio between the size information and the thickness information on the other hand, and to select a piece of shape information for a line image determined as drawable if the comparison results in that the second ration is more than or equal to the first ratio (Rt). the information processing device comprising: a shape information storing part configured to store pieces of shape information for respective combinations of a thickness of a line of line images and a line image size of a line images; a thickness information obtaining part configured to obtain a piece of thickness information describing the thickness of the line of the line image; a code information obtaining part configured to obtain a piece of code information describing a character to be drawn in the target line image; a size information obtaining part configured to obtain a piece of size information of the target line image; a shape information selecting part configured to select a piece of shape information out of pieces of shape information for each character based on the piece of thickness information and the piece of size information; and a drawing information generating part configured to read out the piece of shape information selected by the shape information selecting part from the shape information storing part and to generate a piece of drawing information from the piece of shape information, a shape information storing part configured to store pieces of shape information for respective combinations of a thickness of a line of line images and a line image size of a line images; a thickness information obtaining part configured to obtain a piece of thickness information describing the thickness of the line of the line image; a code information obtaining part configured to obtain a piece of code information describing a character to be drawn in the target line image; a size information obtaining part configured to obtain a piece of size information of the target line image; a shape information selecting part configured to select a piece of shape information out of pieces of shape information for each character based on the piece of thickness information and the piece of size information; and a drawing information generating part configured to read out the piece of shape information selected by the shape information selecting part from the shape information storing part and to generate a piece of drawing information from the piece of shape information,