Plane coding target and image splicing system and method applying the same

A two-dimensional image splicing system for a plane coding target, comprising a data processing device, a first image acquisition device, a second image acquisition device, an acquisition device connecting bracket, a first XY motion platform, the plane coding target, a coding target fixing base, a second XY motion platform and a measured object fixing base, wherein:

• the first image acquisition device is connected with the second image acquisition device through the acquisition device connecting bracket, the acquisition device connecting bracket is connected with the first XY motion platform, the first XY motion platform drives the acquisition device connecting bracket to move, and the first image acquisition device and the second image acquisition device are respectively in communication connection with the data processing device through a data transmission line;
• the plane coding target covers an upper surface of the whole coding target fixing base, an upper surface of the measured object fixing base is used for placing and fixing a measured object, the coding target fixing base and the measured object fixing base are both fixed on the second XY motion platform, the second XY motion platform drives the coding target fixing base and the measured object fixing base to move synchronously, and the second XY motion platform is located below the first XY motion platform;
• an optical axis direction of the first image acquisition device is parallel to an optical axis direction of the second image acquisition device, the optical axis direction of the first image acquisition device vertically points to the upper surface of the coding target fixing base, and the optical axis direction of the second image acquisition device vertically points to the upper surface of the measured object fixing base;
• a motion plane of the first XY motion platform is perpendicular to the optical axis direction of the first image acquisition device;
• and
• a motion plane of the second XY motion platform, the motion plane of the first XY motion platform, the upper surface of the coding target fixing base and the upper surface of the measured object fixing base are parallel to each other.