1. An image discrimination device comprising: an edge calculating section that calculates an edge direction in each processing unit including a predetermined number of pixels of an image; a local connectivity calculating section that calculates a local connectivity intensity indicating a degree of alignment with the edge direction of a surrounding processing unit in each of the processing units based on the calculated edge direction; and an image attribute discrimination section that discriminates among image attributes in each attribute discrimination region including a predetermined number of processing units of the image using the local connectivity intensity of the processing unit in the attribute discrimination region.