1. An image process apparatus, comprising: an image capture device capturing an original image comprising at least one target object and generating a first depth map corresponding to the original image; a filter selecting the at least one target object from the original image according to the first depth map, and generating a temporary image comprising the at least one target object, wherein the temporary image has a depth information of the at least one target object; a depth estimation unit generating a second depth map corresponding to an input image according to the input image; and a mixture unit blending the temporary image into a predetermined field depth of the input image to generate a blending image comprising the input image and the at least one target object according to the depth information of the at least one target object and the second depth map.