Image resolution recognition device, method for recognizing image resolution and image resolution recognition program

摘要

Accurately expresses the size of the standard resolution on the photographed image of the fingerprint. A start point setting section 12 for setting a starting point on the display line initially designated by the start point specifying instruction among the display lines of the scale marks on the scale in accordance with the start point specifying instruction inputted on the scale included in the fingerprint image, A passing point setting section 13 for setting a passing point on the passing display line each time an input line drawn along the scale from the starting point passes through the display line, and an image An inter-division distance calculating unit 14 for calculating the inter-division distance above, a standard resolution for calculating the size of the standard resolution corresponding to the image by using the inter-division distance and the unit length which is the length of one scale of the scale A calculation unit 15, and a frame display unit 16 that displays a frame on the image in accordance with the size of the standard resolution.