1. An image correction apparatus comprising: an imaging device configured to capture an image, with an optical axis thereof being set inclined upward or downward with respect to a direction parallel to a ground surface; a memory section storing therein a transformation map that shows a relationship in location of pixels between the captured image and a corrected image to create the corrected image from the captured image via making a correction on inclination of a display object with respect to a vertical direction perpendicular to the ground surface, wherein the display object having the inclination to be corrected is a display object that, although should be displayed in the vertical direction on the captured image, has the inclination with respect to the vertical direction on the captured image; a corrected image creation section configured to transform location of pixels of the captured image in accordance with the transformation map stored in the memory section, thereby creating the corrected image, in which the correction has been made on the inclination of the display object with respect to the vertical direction; and a display device configured to display the corrected image created by the corrected image creation section.