An image processing method and an image processing apparatus are provided. The image processing method measures a myocardial performance index (MPI), the image processing method including: obtaining a region of interest (ROI) for measuring the MPI, based on signal levels of an input signal and an output signal of a heart spectrum image obtaining a plurality of marker areas, within the obtained ROI, wherein at least one marker for measuring the MPI is located in each of the plurality of marker areas, based on at least one from among a feature value of the input signal and a feature value of the output signal and obtaining the at least one marker for each of the plurality of marker areas.提供一種影像處理方法及一種影像處理裝置。所述影像處理方法量測心肌效能指數(MPI),所述影像處理方法包含:基於心臟頻譜影像之輸入信號及輸出信號之信號位準,獲得用於量測所述MPI之注意區域(ROI);基於所述輸入信號之特徵值及所述輸出信號之特徵值當中的至少一者,在所獲得的ROI內獲得多個標記區域,其中用於量測所述MPI之至少一標記位於所述多個標記區域中之每一者中;以及針對所述多個標記區域中之每一者獲得所述至少一標記。300‧‧‧影像處理方法310、320、330‧‧‧操作