The embodiments of the invention provide an image processing method which can improve the quality of image processing during shooting and improve the fidelity of image colors. The method comprises thesteps of: when a preflashing function is enabled, acquiring a first white balance parameter, wherein the first white balance parameter is acquired when a flash lamp is not turned on; performing preflashing on a target object, collecting a preflashing image of the target image and a reference white balance parameter of preflashing reference points, and acquiring a second white balance parameter; according to the preflashing reference points, determining the number of effective preflashing pixel points in the preflashing image; receiving a shooting instruction of turning on the flash lamp and,in response to the shooting instruction, acquiring a third white balance parameter; according to the number of the effective preflashing pixel points, the first white balance parameter, the second white balance parameter and the third white balance parameter, determining a current white balance parameter; processing collected shot images by using the current white balance parameter. The embodiments of the invention also provide a terminal and a computer readable medium.