5 results about "Calibration result" patented technology

The invention discloses a binocular distance measurement device and method, and an accelerator radiotherapy system comprising the same. The binocular distance measurement device is composed of two optical sensors, a calibration processing module, and a distance measurement module. The two optical sensors are used for carrying out digital image collection on a measured object. The calibration processing module is used for carrying out binocular stereo calibration and coordinate system calibration to obtain a calibration result. The distance measurement module carries out distortion correction processing on a collected original digital image based on the calibration result obtained by the calibration processing module and acquires a real-time distance between a radioactive source and a target by combining a Kalman prediction algorithm, a template matching algorithm, and an angular point extraction algorithm. According to the invention, because of combination of the Kalman prediction algorithm, the template matching algorithm, and the angular point extraction algorithm based on the binocular distance measurement system, the calculation precision is improved substantially and the processing speed of the algorithm is increased; and a real-time processing effect is realized in actual hospital treatment.

The invention provides an alignment calibration method and system for a 3D measuring device and a computer readable storage medium. The method is applied to a 3D measuring device comprising at least one automatic focusing module and an imaging module and comprises the steps of: calibrating a lens of the automatic focusing module, and obtaining a calibration result; acquiring a first motion displacement value and a motion inclination value of the lens of the automatic focusing module at a plurality of preset distances according to the calibration result; constructing a polynomial fitting function, fitting the optical center deviation value of the lens obtained according to the motion inclination value with the first motion displacement value, determining the value of an undetermined coefficient in the polynomial fitting function, and storing the value of the undetermined coefficient as the fitting parameter of the lens; obtaining the optical center deviation value of the lens accordingto a second motion displacement value during the real-time movement of the lens and the polynomial fitting function; and calibrating the optical center parameter of the lens according to the optical center deviation value of the lens, and aligning and calibrating the 3D measuring device. The method is simple and efficient, and eliminates errors caused by gravity.