1. An information processing method, comprising: providing information for pixels in an image corresponding to an object, wherein the information specifies a measurement reading; determining an image of preliminary contour of the object based on the information; assigning primary and reference pixels; wherein for each primary pixel, determining a corresponding anchor point of the primary pixel located on the preliminary contour of the object, wherein the reference pixels are adjacent to the primary pixel; and the anchor point is the center of the primary pixel; determining a modification vector according to the information corresponding to the primary and reference pixels; and adjusting the position of the anchor point according to the modification vector to obtain the final contour.