Patent ID: 9514526
Filing Date: 2016-12-06
CPC Classification: G06K,G06T

Claim Text:
1. A device for detecting a rotation angle from a normal position of an image, the device comprising: an electron microscope configured to generate an original photographed image of an inspection object; a computing device coupled to the electron microscope, wherein the computing device is configured to: based on one of the original photographed image and the original photographed image having been subjected to predetermined preprocessing used as an input image, generate a plurality of equally-spaced virtual parallel lines that extend at each angle of a plurality of angles, at each angle that the plurality of equally-spaced virtual parallel lines extend, of the plurality of angles, generate an evaluation value based on reference points of each of the equally-spaced virtual parallel lines, the reference points are points of intersection of each of the equally-spaced virtual parallel lines and horizontal axis lines of the input image, or the reference points are points of intersection of each of the equally-spaced virtual parallel lines and vertical axis lines of the input image; generate evaluation value data based on the evaluation value of the equally-spaced virtual parallel lines extending at each of the plurality of angles wherein a distance between each of the equally-spaced virtual parallel lines, in a direction that is perpendicular to the equally-spaced virtual parallel lines, differs depending on the angle; and detect a desired angle of the plurality of predetermined discrete angles based on the evaluation value data.