1. An image processing apparatus synthesizing a plurality of sub-images in a panoramic way to create a panoramic image, comprising: a face recognizing unit recognizing a person's face in one or more detected face regions from the plurality of sub-images, thereby determining one or more sub-images each having the person's face in the one or more detected face regions, wherein the face recognizing unit determines a number of face regions having one or more faces recognized in the one or more sub-images having the person's face; a sampling image selecting unit selecting a sampling image which has the person's face recognized by the face recognizing unit, out of the plurality of sub-images in a panoramic way to create a panoramic image, wherein the sub-images are arranged adjacent and abut each other in a grid to create the panoramic image having a larger scope than each of the sub-images in the plurality of sub-images; a sampling unit sampling a plurality of pixels from the selected sampling image to obtain a plurality of sampled pixels, wherein the sampling image selecting unit selects the sampling image which has the most determined number of face regions having the one or more faces recognized, from the one or more sub-images having the person's face from the face recognizing unit; a correction parameter establishing unit extracting features from the plurality of the sampled pixels from the sampling unit, and establishing a correction parameter for image correction based on the extracted features, wherein the correction parameter is established such that the extracted features are within a predetermined range of an image quality parameter; and an image processing unit synthesizing the plurality of the sub-images in a panoramic way and simultaneously correcting the entire panoramic image based on the established correction parameter from the correction parameter establishing unit, wherein the sample image selecting units creates the panoramic image by detecting a center coordinate of a face region in the number of face regions determined by the face recognizing unit and finding a distance from a center of the panoramic image to the center of the face region.