PROBLEM TO BE SOLVED: To acquire an image having a wide observable density range while reducing noises, in an image processing apparatus, method, and program for performing an addition process on a radiographic image.SOLUTION: An image acquisition unit 31 acquires first and second radiographic images from first and second radiation detectors. A first frequency analysis unit 32 generates a first high-frequency component GH1 which is a high-frequency component of the first radiographic image, and a second frequency analysis unit generates a second high-frequency component GH2 and a second low-frequency component GL2 which are a high-frequency component and a low-frequency component of the second radiographic image. An addition processing unit 34 performs weighting and addition on the first and second high-frequency components GH1, GH2 to generate an addition high-frequency component GHa, and a synthesis unit 35 synthesizes the addition high-frequency component GHa and the second low-frequency component GL2 to generate a processed image.SELECTED DRAWING: Figure 2【課題】放射線画像を加算処理する画像処理装置、方法およびプログラムにおいて、ノイズを低減しつつ、観察可能な濃度範囲が広い画像を取得する。【解決手段】画像取得部３１が、第１および第２の放射線検出器から、第１および第２の放射線画像を取得する。第１の周波数解析部３２が、第１の放射線画像の高周波成分である第１の高周波成分ＧＨ１を生成し、第２の周波数解析部が、第２の放射線画像の高周波成分および低周波成分である第２の高周波成分ＧＨ２および第２の低周波成分ＧＬ２を生成する。加算処理部３４が、第１および第２の高周波成分ＧＨ１，ＧＨ２に対して重み付け加算を行うことにより加算高周波成分ＧＨａを生成し、合成部３５が、加算高周波成分ＧＨａと第２の低周波成分ＧＬ２とを合成して処理済み画像を生成する。【選択図】図２
