1. An image processing method for handheld devices, for use in an electronic device, comprising; determining an image effect; continuously capturing a plurality of images by an image capture unit for previewing; after the plurality of images are captured, respectively, applying the image effect to each of the plurality of images; displaying each of the plurality of images applied with the image effect in a display unit, wherein the display unit is a touch-sensitive display unit; displaying a control interface in the touch-sensitive display unit; receiving an operation corresponding to the control interface via the touch-sensitive display unit, in which the operation is used to determine at least one effect parameter corresponding to the image effect; and applying the image effect to each of the plurality of images based on the at least one effect parameter, wherein the control interface comprises a specific region having a range covered on the plurality of images for determining an area of the plurality of images for applying the image effect.