1. An image processing apparatus comprising: an image capturing section that captures at least a part of a target image, which includes a plurality of marker images and a recognition target range defined by the plurality of marker images, to acquire a captured a marker-image detecting section that detects the marker images from the captured image; a judging section that judges, based on a detection result, whether or not the recognition target range is included in the captured image by judging whether a predetermined number of the marker images have been detected; and an output section that, when the judging section judges that the recognition target range is not included in the captured image, outputs guidance for capturing the recognition target range.