Disclosed are methods for dual-camera-based imaging, a mobile terminal. A first image shot by the wide-angle camera and a second image shot by the telephoto camera are acquired. The first image is cropped according to a target region of the first image to acquire a third image. Depth information of the third image is determined according to the third image and the second image. Blurring processing is performed on the third image according to the depth information, to obtain a fourth image.