Image reconstruction method and device

An image reconstruction method, comprising:

• when a preset long-focus image set acquisition condition is met, driving a pan-tilt platform of a binocular long-focus and short-focus pan-tilt camera to rotate throughout a field-of-view range, obtaining one long-focus image every preset horizontal and/or vertical angle, and constituting a first long-focus image set with all long-focus images acquired throughout the field-of-view range, wherein adjacent long-focus images overlap partially;
• receiving a zoom request, and performing interpolating on a first short-focus image currently acquired by the binocular long-focus and short-focus pan-tilt camera to obtain a second short-focus image that meets the zoom request;
• downsampling each long-focus image in the first long-focus image set to obtain a second long-focus image set, wherein a target in each long-focus image in the second long-focus image set and the same target in the second short-focus image are matched in size;
• dividing the second short-focus image into blocks, and searching, for each of the divided blocks, all long-focus images in the second long-focus image set for a matching block;
• fusing each of the divided blocks in the second short-focus image with the matching block for this divided block to obtain a reconstructed short-focus image;
• wherein the binocular long-focus and short-focus pan-tilt camera is composed of a short-focus camera and a long-focus camera, relative positions of the short-focus camera and the long-focus camera are fixed, and the short-focus camera and the long-focus camera rotate simultaneously with the pan-tilt platform.