The high-end application of corner calibration technology--the successful take-off and landing of China's J15 marks that China's aircraft carrier platform experiment has entered a new stage, and it also marks that the platform has begun to have combat effectiveness and has a very practical significance for safeguarding the territorial sovereignty of the country.

After the successful landing of the J15 was officially confirmed, the domestic and foreign media madly reprinted the report. Careful people will find traces of corner markings on the J15 carrier. Corner calibration technology is a new visual marking technique that does not cause bias, which is not only highly accurate but also reliable. Our Hualang 3D (Holon3D) also has a corner calibration technique like this.

The corner points of the corner mark are similar to the intersection of the black and white checkerboard, which satisfies the requirement of "ideal point" - that is, there is no size. When extracting, we get the coordinates of the corner point directly, instead of getting it by fitting, so there is no deviation from the real corner point. This not only improves the positioning accuracy, but also ensures the accuracy and reliability of subsequent photogrammetry.Compared with dot markers, the extraction of corner markers is much more complicated. If it is implemented by software alone, it is difficult to achieve real-time smooth scanning.

To this end, we have incorporated the corner extraction algorithm into the hardware chip, which not only ensures the smoothness of scanning, but also greatly reduces the requirements for computer configuration.

Corner point calibration technology for high-end applications - the US lunar rover also uses this technology

Hualang 3D has developed a handheld 3D scanner (Holon-3DH-3M) with this technology. The handheld 3D scanner 3DH-3M (2013 version) is the basic model of the line laser handheld 3D scanner with self-calibration function ( Module), which uses a 635nm red line laser with two cameras, uses a reflective corner marker when working, and works with scanning software to support photogrammetry and self-calibration techniques. The scanner's interface is very simple, a USB 2.0 interface and a power interface, the power interface is connected to 12V / 1A DC power.

Our company is a professional manufacturer of handheld 3D scanners, camera 3D scanners and 3D measuring instruments. We are committed to the manufacture of 3D digital technology and continuously develop and produce 3D scanners and 3D measuring systems suitable for production needs.