1. A portable terminal apparatus for transmitting image data to an image output apparatus, the image output apparatus including: a correction processing section for carrying out a high resolution correction in accordance with a plurality of pieces of the image data so as to obtain high resolution image data which has a higher resolution than the plurality of pieces of the image data, the image output apparatus outputting the high resolution image data corrected by the correction processing section, said portable terminal apparatus, comprising: an image capture section for consecutively more than once capturing images of an identical object; a captured image determination section for determining whether or not a plurality of pieces of captured image data captured by the image capture section meet a given requirement; and a transmission section for transmitting, to the image output apparatus, captured image data which is determined, by the captured image determination section, to meet the given requirement, the given requirement including a requirement A, the requirement A being such that the plurality of pieces of captured image data consecutively captured by the image capture section include a combination of a given number (an integer not less than 2) of pieces of captured image data which are applicable to be subjected to the high resolution correction by the correction processing section and are offset by a given amount, the transmission section transmitting the given number of pieces of captured image data which are determined to be the combination by the captured image determination section.