1. A method of panoramic image processing, for generating an object image from an image sequence obtained in a real-time way or stored in a medium, in which a serial number i of an image is 1, 2, 3,. .. , and Δ is an interval for picking up the image sequence, comprising the steps of: a. obtaining the image sequence from an ultrasonic imaging apparatus comprising a probe for transmitting an ultrasonic wave to a detected organism and receiving an ultrasonic echo reflected from the detected organism, and initializing an aligned image and a spliced image as a first image frame; b. dividing an i-th image frame F i into a plurality of sub-regions, and selecting valid sub-regions from the sub-regions of the i-th image frame F i through a first filtering based on at least one of organism smoothness and grayscale level within the sub-regions; c. calculating motion vectors for the valid sub-regions of the i-th image frame F i with respect to a current aligned image; d. calculating a transform coefficient based upon a fitting of the motion vectors; e. splicing the i-th image frame F i to a current spliced image based upon the transform coefficient, and configuring or splicing the current aligned image with the i-th image frame F i ; and f. displaying the current spliced image as a resultant image on a display device.