Image splicing method and device for multi-channel optical detection system

The invention provides an image splicing method for a multi-channel optical detection system. The method comprises the steps that collected images are preprocessed according to a set downsampling ratio, and downsampled to-be-spliced images are obtained; reference images are selected from the to-be-spliced images, and the splicing sequence of the to-be-spliced images is set; according to the set splicing sequence, features of splicing regions of the adjacent to-be-spliced images are extracted respectively and screened, and a transformation matrix of the preferential feature point pair information and the to-be-spliced images is determined; initial image balance parameters of the to-be-spliced images corresponding to the preferential feature point pair information are calculated; according to the set splicing sequence, and image balancing processing is performed on the to-be-spliced images by means of the initial image balance parameters, and the to-be-spliced images obtained after image balancing processing ar