PROBLEM TO BE SOLVED: To provide an image processing apparatus capable of improving accuracy of irradiation field recognition in a radiation image.SOLUTION: In an irradiation field recognition processing, a control part of a photographing console calculates an evaluation value as an irradiation field end of each straight line candidate within such a range that each straight line candidate extracted from a radiation image as a straight line candidate of the irradiation field end is included in an irradiation field region or on the irradiation field end, and then performs truth/falseness determination of each straight line candidate based on the calculated evaluation value.【課題】放射線画像における照射野認識の精度を向上させることができる画像処理装置を提供する。【解決手段】撮影用コンソールの制御部は、照射野認識処理において、放射線画像から照射野端の直線候補として抽出された各直線候補が照射野領域内又は照射野端上に含まれている範囲内で各直線候補の照射野端としての評価値を算出し、算出した評価値に基づいて各直線候補の正誤判定を行う。【選択図】図１１
