Target-based measurement coordinate error correction method

The invention discloses a target-based measurement coordinate error correction method. The method comprises steps of marking a plurality of feature points in a target, and measuring a distance Dn between each feature point and the center of the target; setting the center of the target as a reference point O, and measuring the three-dimensional coordinates (x0, y0, z0) of the reference point O; calculating the size L of each pixel point in the initial image, and obtaining the three-dimensional coordinates (xn, yn, zn) of each feature point in the initial image; the distance Dn between each feature point and the center of the target being determined again according to the size L of the pixel points, the three-dimensional coordinates (x'n, y'n and z'n) of each feature point in the next frame of image being obtained, and three-dimensional coordinates (xn, yn and zn) of each feature point and the three-dimensional coordinates (x'n, y'n and z'n) being compared and corrected. The method is advantaged in that coordin