The purpose of the present invention is to make it possible to perform high-precision measurement of a measuring object such as a farm field in a short time. For this purpose, a multi-spectrum camera that captures images of multiple different wavelength bands is used to capture a portion of the range of a measuring object to obtain sampling images which are subjected to processing. The sampling images are calculated, as processing objects, to generate a calculation result image that provides information for evaluating the entire measuring object.
