1. A system for displaying image recognition processing suitability, comprising: a resolution evaluation unit for performing a process of evaluating, by using a resolution evaluation function, a resolution of a monitoring target object in an image to be acquired when the monitoring target object placed within a preset monitoring target region is photographed and thereby calculating a resolution evaluation value of the monitoring target object at its placement location, the resolution evaluation function defining a relationship between the resolution and a resolution evaluation value indicating suitability for an image recognition process, calculation of the resolution evaluation value being performed for each location within the monitoring target region excluding a presence area of an obstacle; a gazing point angle evaluation unit for performing a process of evaluating a gazing point angle by using a gazing point angle evaluation function and thereby calculating a gazing point angle evaluation value of the monitoring target object at its placement location, the gazing point angle denoting an angle that the ground forms with a straight line passing through a location of a camera and a gazing point in the monitoring target object placed within the monitoring target region, the gazing point angle evaluation function defining a relationship between the gazing point angle and a gazing point angle evaluation value indicating suitability for the image recognition process, calculation of the gazing point angle evaluation value being performed for each location within the monitoring target region excluding the presence area of the obstacle; a suitability calculation unit for calculating suitability for each location within the monitoring target region excluding the presence area of the obstacle, on the basis of at least the resolution evaluation values and the gazing point angle evaluation values, the suitability indicating a degree to which the image of the monitoring target object placed at each location is suitable for the image recognition process; and a display control unit for causing a display device to show regions within the monitoring target region in a mode commensurate with the suitabilities, the regions corresponding to the suitabilities.