1. A computer-implemented method for processing stereo images, the method comprising: receiving a video sequence associated with a recorded setting of a stereoscopic camera, the recorded setting including a desired setting of the stereoscopic camera, the video sequence comprising pairs of left and right images; determining, by a computer, a corresponding actual setting of the stereoscopic camera, the corresponding actual setting including an actual setting of the stereoscopic camera while the video sequence is captured, wherein the corresponding actual setting is determined using a virtual three-dimensional (3D) space and a virtual camera rig in the virtual 3D space; and processing the pairs of left and right images by the computer to detect and reduce an influence of a discrepancy between the recorded setting of the stereoscopic camera and the corresponding actual setting of the stereoscopic camera, wherein the discrepancy is detected by the computer using the virtual 3D space and the virtual camera rig in the virtual 3D space.