5 results about "Template matching" 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 discloses a template image global searching method based on a mask matrix and fast Fourier transform. The template image global searching method mainly solves the problem that the existing template searching method has too high calculation complexity. The template image global searching method comprises the steps of copying a template figure and a full figure, generating a mask figure by utilizing the template figure, processing an original template figure by means of the mask figure, calculating energy of the template figure, extending the template figure and the mask figure, carrying out cyclic convolution on the template extended figure and the full figure, calculating an energy matrix of the full figure, substituting the energy matrix into a template matching formula, finding out a maximum response position, and achieving full figure searching. The template image global searching method realizes the calculation of a response matrix at one step through extension of the template figure and generation of the mask figure, realizes dense matching, calculates cyclic convolution through Fourier transform, reduces calculation complexity of temperate searching, greatly shortens calculation time, and ensures the ''cyclic direction'' of cyclic convolution through conjugation. The template image global searching method can be applied to the situations of video tracking, template position searching, mechanical part positioning and the like.