backgrounddrift.m

ESTIMATION OF AIRCRAFT TRAJECTORY FROM ITS MOTION USING KALMAN TRACKING FILTER

for t = 1:num_frames
        % Drift the Background at the rate driftx and difty (in pixels/second) and add in the vibration:
        xshift = driftx*delt*t+levarmx*vibx(t,1);
        yshift = drifty*delt*t+levarmy*viby(t,1);

        % Interpolate the 2D image using the MATLAB function interp2:
        [xgrid ygrid] = meshgrid(1:backsize);
        [xindex yindex] = meshgrid(xshift:1:xshift+backsize,yshift:1:yshift+backsize);
        outtemp = interp2(xgrid,ygrid,background,xindex,yindex);

        % Truncate the drifted image down from backsize to framesize:
        out(:,:,t) = outtemp(xoff:xoff+framesize-1,xoff:xoff+framesize-1);
end