The present disclosure relates to a image data generating method and device. The device may be configured to obtain a plurality of frames of images of a scene including at least one object, each of the plurality of frames of images is associated with a character distance of a plurality of character distances of the electronic device. For each of the plurality of frames of images, device may determine a target image area, wherein the target image area is an image area on which an object in the scene is sharply focused; and set a focus area in the target image area. Finally, the device may generate an all-focused image by combining the plurality of frames of images, wherein each of the at least one object is sharply focused.