Image calibration method and system

Abstract

The present invention provides an image calibration method and system. The method comprises a step of obtaining the coordinates of multiple calibration points of a user to be detected in a first coordinate system, wherein the first coordinate system is the coordinate system of the first image of the user to be detected, a step of obtaining the coordinates of corresponding calibration points in a real-time image to the user to be detected in a second coordinate system, wherein the second coordinate system is the coordinate system of the user to be detected, a step of obtaining the conversion relationship between the first coordinate system and the second coordinate system according to the coordinates of the multiple calibration points in the first coordinate system and the coordinates of the corresponding calibration points in the real-time image in the second coordinate system, a step of obtaining the initial point cloud and real-time point cloud of the user to be detected, a step of registrating the real-time point cloud and the initial point cloud and obtaining the conversion relationship between the third coordinate system and the first coordinate system, wherein the third coordinate system is the coordinate system of point cloud acquisition equipment, and a step of calibrating the first image. According to the method and the system, the detection of a user movement is realized, and the image error caused by the movement of the user is adjusted.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an image calibration method and system. Background technique [0002] Skull base tumors refer to tumors that originate from the skull base and its adjacent structures and grow intracranially or extracranially. Such tumors are often located deep, adjacent to the brainstem, cranial nerves, and important blood vessels. With the development of endoscopic surgical technology and auxiliary technology and the continuous accumulation of surgical experience, endoscopic minimally invasive diagnosis and treatment technology has been widely used in the treatment of skull base tumors. While meeting the same surgical scope and purpose, it avoids surgical approach The damage to facial skin, soft tissue and bone structure greatly reduces the probability of surgical complications. However, the clinical curative effect of endoscopic minimally invasive diagnosis and treatment is closely r...

AI Technical Summary

Problems solved by technology

However, the system is affected by surgical operations and breathing movements, and organs will move and deform, resulting in the inability of the real-time endoscopic image to be well superimposed with the preoperative data, which seriously affects the navigation accuracy.

The irregular movement of the user during the operation is a huge challenge for the surgical navigation system. In the traditional navigation system, it is necessary to repeat the manual calibration during the operation to correct this movement, which brings great inconvenience to the operation process.

Images