IMAGE PROCESSING APPARATUS AND IRRADIATING FIELD RECOGNITION METHOD

摘要

According to one implementation, an image processing apparatus includes the following. A setting unit sets a point in an irradiating field region of a radiation image as a reference point. A candidate point extracting unit extracts irradiating field edge candidate points based on the set reference point. A straight line candidate extracting unit extracts straight line candidates of the irradiating field edge based on the extracted irradiating field edge candidate points. A judging unit performs correct/incorrect judgment of the extracted straight line candidates. A recognizing unit recognizes the irradiating field region based on the straight line candidates judged to be correct. The judging unit calculates an evaluating value of the straight line candidates as the irradiating field edge. The judging unit performs correct/incorrect judgment of the straight line candidates based on the calculated evaluating value.

主权项

1. An image processing apparatus comprising:
a setting unit which sets a point in an irradiating field region of a radiation image obtained by capturing a subject with radiation using an irradiating field diaphragm as a reference point; a candidate point extracting unit which extracts a plurality of irradiating field edge candidate points which are candidates of points on an irradiating field edge in the radiation image based on the set reference point; a straight line candidate extracting unit which extracts a plurality of straight line candidates of the irradiating field edge from the radiation image based on the extracted irradiating field edge candidate points; a judging unit which performs correct/incorrect judgment of whether the extracted straight line candidates are correct or incorrect; and a recognizing unit which recognizes the irradiating field region in the radiation image based on the straight line candidates judged to be correct by the judging unit, wherein, the judging unit calculates an evaluating value of the straight line candidates as the irradiating field edge within a range where the straight line candidates are included in the irradiating field region or on the irradiating field edge, and performs correct/incorrect judgment of the straight line candidates based on the calculated evaluating value.