An image processing apparatus includes a pre-combination processing unit configured to perform a pre-combination process so that a plurality of frames of image data having continuity in time are used as combination-use image data to be combined, an operation detection unit configured to detect operation input information used for a combination process, a storage unit configured to store coefficient templates each having a pattern of weighting coefficients assigned to image data of frames, a template management unit configured to select one of the coefficient templates stored in the storage unit according to the operation input information, and a combination processing unit configured to perform a combination process on the combination-use image data of the plurality of frames obtained in the pre-combination process using the coefficient template selected by the template management unit so as to generate combined-image data representing a still image.