Two-way mass center tracking imaging method and device

The invention discloses a dual-line center-of-mass following imaging method. When in treatment of a whole spot image, gray values of the current two lines of pixels are simultaneously read at each time, the gray values of the two lines of the pixels are simultaneously compared with a preset threshold, when at least one of the two lines of the pixels is larger than the threshold, the dual-line data labeling, the dual-line data merging and the dual-line data accumulation processes are implemented till the completion of the treatment of the whole spot image, and the obtained coordinates of the center-of-mass of the spot image are output. The invention further simultaneously discloses a dual-line center-of-mass following imaging device, and the use of the method and the device can improve the parallel treatment ability of data and the treatment speed of the data.